RO75006A - Procedeu pentru prepararea unor mercaptoazetidinone - Google Patents

Procedeu pentru prepararea unor mercaptoazetidinone

Info

Publication number: RO75006A
Authority: RO; Romania
Prior art keywords: mercaptoazetidinone; preparation
Prior art date: 1975-02-17

Application number

RO7694586A

Other languages

English (en)

French (fr)

Inventor

Yoshio Hamashima

Nitsuru Yoshioka

Original Assignee

Shionogi & Co.,Ltd.,Jp

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1975-02-17

Filing date

1976-02-17

Publication date

1980-10-30

Family has litigation

First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27457226&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=RO75006(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.

1975-02-17 Priority claimed from JP50019612A external-priority patent/JPS5198265A/ja

1975-02-21 Priority claimed from JP50022229A external-priority patent/JPS51105051A/ja

1975-03-07 Priority claimed from JP50028452A external-priority patent/JPS609516B2/ja

1975-03-20 Priority claimed from JP50033808A external-priority patent/JPS5817460B2/ja

1976-02-17 Application filed by Shionogi & Co.,Ltd.,Jp filed Critical Shionogi & Co.,Ltd.,Jp

1980-10-30 Publication of RO75006A publication Critical patent/RO75006A/ro

Links

Classifications

- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D205/00—Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom
- C07D205/02—Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings
- C07D205/06—Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
- C07D205/08—Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with one oxygen atom directly attached in position 2, e.g. beta-lactams
- C07D205/09—Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with one oxygen atom directly attached in position 2, e.g. beta-lactams with a sulfur atom directly attached in position 4
- C07D205/095—Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with one oxygen atom directly attached in position 2, e.g. beta-lactams with a sulfur atom directly attached in position 4 and with a nitrogen atom directly attached in position 3
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/55—Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups

Landscapes

Chemical & Material Sciences (AREA)
Organic Chemistry (AREA)
Cephalosporin Compounds (AREA)
Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Nitrogen Condensed Heterocyclic Rings (AREA)
Plural Heterocyclic Compounds (AREA)

RO7694586A 1975-02-17 1976-02-17 Procedeu pentru prepararea unor mercaptoazetidinone RO75006A (ro)

Applications Claiming Priority (4)

Application Number	Priority Date	Filing Date	Title
JP50019612A JPS5198265A (ro)	1975-02-17	1975-02-17
JP50022229A JPS51105051A (ro)	1975-02-21	1975-02-21
JP50028452A JPS609516B2 (ja)	1975-03-07	1975-03-07	セフエム骨格の環化製法
JP50033808A JPS5817460B2 (ja)	1975-03-20	1975-03-20	チアゾリンカンノカイカンホウホウ

Publications (1)

Publication Number	Publication Date
RO75006A true RO75006A (ro)	1980-10-30

Family

ID=27457226

Family Applications (4)

Application Number	Title	Priority Date	Filing Date
RO7684836A RO68460A (ro)	1975-02-17	1976-02-17	Procedeu pentru prepararea unor derivati de azetidinona
RO7694587A RO74958A (ro)	1975-02-17	1976-02-17	Procedeu de preparare a unor cefalosporine
RO7694586A RO75006A (ro)	1975-02-17	1976-02-17	Procedeu pentru prepararea unor mercaptoazetidinone
RO197694535A RO74936A (fr)	1975-02-17	1976-07-17	Procede pour la preparation des mercaptoazetidiones

Family Applications Before (2)

Application Number	Title	Priority Date	Filing Date
RO7684836A RO68460A (ro)	1975-02-17	1976-02-17	Procedeu pentru prepararea unor derivati de azetidinona
RO7694587A RO74958A (ro)	1975-02-17	1976-02-17	Procedeu de preparare a unor cefalosporine

Family Applications After (1)

Application Number	Title	Priority Date	Filing Date
RO197694535A RO74936A (fr)	1975-02-17	1976-07-17	Procede pour la preparation des mercaptoazetidiones

Country Status (24)

Country	Link
US (4)	US4079181A (ro)
AR (1)	AR225878A1 (ro)
AU (1)	AU508160B2 (ro)
BE (1)	BE838656A (ro)
BG (5)	BG25076A3 (ro)
CA (5)	CA1136132A (ro)
CH (5)	CH627160A5 (ro)
DD (5)	DD127902A5 (ro)
DE (1)	DE2606278A1 (ro)
DK (1)	DK156575C (ro)
ES (1)	ES445250A1 (ro)
FR (1)	FR2334669A1 (ro)
GB (3)	GB1548641A (ro)
GR (1)	GR60437B (ro)
IE (1)	IE42479B1 (ro)
IL (5)	IL49048A (ro)
MX (1)	MX3818E (ro)
NL (1)	NL190721C (ro)
NZ (1)	NZ180037A (ro)
PH (1)	PH18022A (ro)
PT (1)	PT64806B (ro)
RO (4)	RO68460A (ro)
SE (4)	SE421691B (ro)
YU (5)	YU40272B (ro)

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CA1136132A (en) *	1975-02-17	1982-11-23	Teruji Tsuji	Cyclization to form cephem ring and intermediates therefor
US4550162A (en) *	1975-02-20	1985-10-29	Ciba-Geigy Corporation	Process for the manufacture of enol derivatives
US4579684A (en) *	1975-02-20	1986-04-01	Ciba-Geigy Corporation	Process for the manufacture of enol derivatives
AT342197B (de) *	1975-02-20	1978-03-28	Ciba Geigy Ag	Neues verfahren zur herstellung von 3-cephemverbindungen
GB1543048A (en) *	1976-02-04	1979-03-28	Beecham Group Ltd	4-mercapto-3-phenoxyacetamido-2-azetidinone
US4271305A (en) *	1979-02-01	1981-06-02	Eli Lilly And Company	Thiazolinoazetidinones and process therefor
JPS55133355A (en) *	1979-04-03	1980-10-17	Shionogi & Co Ltd	Inversion of 3-amino group of beta-lactam ring
FR2455604A1 (fr) *	1979-04-30	1980-11-28	Lilly Co Eli	Nouveaux derives de thiazolino-azetidinones et leur preparation
US4518531A (en) *	1979-04-30	1985-05-21	Eli Lilly And Company	Allylic chlorination process and compounds prepared thereby
CA1148938A (en) *	1979-05-08	1983-06-28	John R. Corfield	Preparation of cephalosporins and intermediates employed therein
US4237279A (en) *	1979-07-27	1980-12-02	Eli Lilly And Company	Crystalline 3-hydroxycephalosporin solvates
DE3265390D1 (en) *	1981-05-19	1985-09-19	Ciba Geigy Ag	Process for the preparation of 4-thio-azetidinone compounds
FR2511376A1 (fr) *	1981-08-17	1983-02-18	Rhone Poulenc Sante	Nouveaux derives de la cephalosporine et leur prepration
JPS5832884A (ja) *	1981-08-20	1983-02-25	Otsuka Chem Co Ltd	３−エキソメチレンセフアム誘導体の製造方法
JPS59101485A (ja) *	1982-11-29	1984-06-12	Otsuka Chem Co Ltd	アセチジノン誘導体
US4533497A (en) *	1982-12-27	1985-08-06	Eli Lilly And Company	N-ethylidene azetidinones
KR850000291B1 (ko) *	1983-02-07	1985-03-16	한국과학기술원	3-메틸렌 세팜 화합물의 제조방법
JPS59164771A (ja) *	1983-03-10	1984-09-17	Otsuka Chem Co Ltd	塩素化アゼチジノン誘導体の製造方法
EP0133670A3 (de) *	1983-08-09	1985-12-18	Bayer Ag	Verfahren zur Herstellung von 7-Acylamino-3-hydrocy-cephem-4-carbonsäuren und 7-Acylamino-3-hydroxy-1-de-thia-1-oxacephem-4-carbonsäuren
DE3725375A1 (de) *	1987-07-31	1989-02-09	Bayer Ag	Stabile oxapenem-3-carbonsaeuren
JP3007986B2 (ja) *	1990-03-02	2000-02-14	大塚化学株式会社	β―ラクタム誘導体の製法
EP0445822B1 (en) *	1990-03-08	1997-06-04	Otsuka Kagaku Kabushiki Kaisha	Thiazolinoazetidinone derivative and process for preparing 2-exo-methylene-penam derivative thereform
US5604222A (en) *	1993-12-27	1997-02-18	Lupin Laboratories, Ltd.	Method for the preparation of 2-chloro sulfinyl azetidinones
US5578721A (en) *	1994-07-11	1996-11-26	Lupin Laboratories Limited	Process for preparation of 3-exomethylene cepham sulfoxide esters
IT1277048B1 (it) *	1995-12-06	1997-11-04	3 Exo S R L	Procedimento per la preparazione di cefalosporine attraverso ciclizzazione riduttiva dicarbonilica per trattamento con
US5986091A (en) *	1996-03-13	1999-11-16	Otsuka Kagaku Kabushiki Kaisha	Process for preparation of β-lactam compounds
JP5733856B2 (ja)	2007-10-09	2015-06-10	ソファーミア，インコーポレイテッド	広帯域β−ラクタマーゼ阻害薬
CN101525341B (zh) *	2009-04-01	2012-07-04	浙江东邦药业有限公司	一种3-羟基头孢化合物的制备方法
ES2700575T3 (es)	2013-03-12	2019-02-18	Gladius Pharmaceuticals Corp	3-Estiril-cefalosporinas derivadas
CN108727409A (zh) *	2017-04-24	2018-11-02	浙江省化工研究院有限公司	一种3-羟基头孢菌素的制备方法
EP4136066A1 (en) *	2020-04-17	2023-02-22	DSM IP Assets B.V.	A process for preparation of substituted enamine compounds
CN111647638A (zh) *	2020-04-17	2020-09-11	江苏正泰药业有限公司	一种7-anca的制备工艺

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3862164A (en) *	1971-02-03	1975-01-21	Lilly Co Eli	Thiazolidine azetidinones
GB1457421A (en) *	1973-01-04	1976-12-01	Glaxo Lab Ltd	Cepham derivatives
AU498131B2 (en) *	1974-02-26	1979-02-15	Ciba-Geigy Ag	Production of cephems by cyclization
JPS5188955A (ro) *	1975-01-30	1976-08-04
CA1136132A (en) *	1975-02-17	1982-11-23	Teruji Tsuji	Cyclization to form cephem ring and intermediates therefor
US4147864A (en) *	1975-02-20	1979-04-03	Ciba-Geigy Corporation	Process for the manufacture of 7β-amino-3-cephem-3-ol-4 carboxylic acid compounds
AT342197B (de) *	1975-02-20	1978-03-28	Ciba Geigy Ag	Neues verfahren zur herstellung von 3-cephemverbindungen
JPS5214789A (en) *	1975-07-22	1977-02-03	Shionogi & Co Ltd	Process for preparing 3-substiuted cephem compounds by ring closure
US4008230A (en) *	1975-10-29	1977-02-15	Eli Lilly And Company	Process for preparing 3-hydroxy cephalosporins
JPS6019315B2 (ja) *	1976-01-23	1985-05-15	塩野義製薬株式会社	アゼチジノン化合物
GB1529913A (en) *	1976-02-04	1978-10-25	Beecham Group Ltd	Beta-lactam compounds
US4264597A (en) *	1978-06-06	1981-04-28	Masashi Hashimoto	Cephalosporin analogues and processes for the preparation thereof

1976
- 1976-02-09 CA CA000245317A patent/CA1136132A/en not_active Expired
- 1976-02-16 PT PT64806A patent/PT64806B/pt unknown
- 1976-02-16 IL IL49048A patent/IL49048A/xx unknown
- 1976-02-16 DK DK061976A patent/DK156575C/da active
- 1976-02-16 SE SE7601715A patent/SE421691B/xx not_active IP Right Cessation
- 1976-02-17 AR AR262283A patent/AR225878A1/es active
- 1976-02-17 BG BG034108A patent/BG25076A3/xx unknown
- 1976-02-17 BE BE164401A patent/BE838656A/xx not_active IP Right Cessation
- 1976-02-17 ES ES445250A patent/ES445250A1/es not_active Expired
- 1976-02-17 CH CH191876A patent/CH627160A5/de not_active IP Right Cessation
- 1976-02-17 RO RO7684836A patent/RO68460A/ro unknown
- 1976-02-17 FR FR7604318A patent/FR2334669A1/fr active Granted
- 1976-02-17 YU YU384/76A patent/YU40272B/xx unknown
- 1976-02-17 MX MX76898U patent/MX3818E/es unknown
- 1976-02-17 BG BG034106A patent/BG25216A3/xx unknown
- 1976-02-17 IE IE313/76A patent/IE42479B1/en unknown
- 1976-02-17 GB GB6187/76A patent/GB1548641A/en not_active Expired
- 1976-02-17 DD DD7600195998A patent/DD127902A5/xx unknown
- 1976-02-17 BG BG034105A patent/BG24949A3/xx unknown
- 1976-02-17 NL NL7601613A patent/NL190721C/xx not_active IP Right Cessation
- 1976-02-17 DD DD191283A patent/DD124986A5/xx unknown
- 1976-02-17 BG BG034107A patent/BG27557A4/xx unknown
- 1976-02-17 DE DE19762606278 patent/DE2606278A1/de active Granted
- 1976-02-17 GR GR50078A patent/GR60437B/el unknown
- 1976-02-17 RO RO7694587A patent/RO74958A/ro unknown
- 1976-02-17 DD DD7600195997A patent/DD127901A5/xx unknown
- 1976-02-17 BG BG032385A patent/BG24948A3/xx unknown
- 1976-02-17 DD DD7600195995A patent/DD127900A5/xx unknown
- 1976-02-17 RO RO7694586A patent/RO75006A/ro unknown
- 1976-02-17 US US05/658,665 patent/US4079181A/en not_active Expired - Lifetime
- 1976-02-17 AU AU11181/76A patent/AU508160B2/en not_active Expired
- 1976-02-17 DD DD7600195993A patent/DD127899A5/xx unknown
- 1976-02-17 GB GB41074/78A patent/GB1548643A/en not_active Expired
- 1976-02-17 GB GB41073/78A patent/GB1548642A/en not_active Expired
- 1976-02-17 NZ NZ180037A patent/NZ180037A/xx unknown
- 1976-03-03 PH PH18164A patent/PH18022A/en unknown
- 1976-07-17 RO RO197694535A patent/RO74936A/ro unknown
1977
- 1977-12-01 US US05/856,806 patent/US4160085A/en not_active Expired - Lifetime
1978
- 1978-11-26 IL IL56050A patent/IL56050A0/xx not_active IP Right Cessation
- 1978-11-26 IL IL56049A patent/IL56049A0/xx not_active IP Right Cessation
1979
- 1979-05-28 IL IL57418A patent/IL57418A0/xx not_active IP Right Cessation
- 1979-06-11 IL IL57541A patent/IL57541A0/xx unknown
- 1979-09-20 SE SE7907813A patent/SE434637B/sv not_active IP Right Cessation
- 1979-09-20 SE SE7907811A patent/SE444811B/sv not_active IP Right Cessation
- 1979-09-20 SE SE7907812A patent/SE434950B/sv not_active IP Right Cessation
- 1979-10-19 CA CA000337975A patent/CA1095026A/en not_active Expired
- 1979-10-19 CA CA000337973A patent/CA1144924A/en not_active Expired
- 1979-10-19 CA CA000337974A patent/CA1077936A/en not_active Expired
- 1979-10-22 CA CA000338132A patent/CA1132547A/en not_active Expired
1980
- 1980-01-30 CH CH75080A patent/CH628030A5/de not_active IP Right Cessation
- 1980-01-30 CH CH74980A patent/CH634579A5/de not_active IP Right Cessation
- 1980-01-30 CH CH74880A patent/CH630074A5/de not_active IP Right Cessation
- 1980-01-30 CH CH75180A patent/CH628031A5/de not_active IP Right Cessation
- 1980-02-27 US US06/125,233 patent/US4346218A/en not_active Expired - Lifetime
1982
- 1982-01-11 US US06/338,651 patent/US4440683A/en not_active Expired - Lifetime
- 1982-08-10 YU YU1739/82A patent/YU40412B/xx unknown
- 1982-08-10 YU YU1738/82A patent/YU40411B/xx unknown
- 1982-08-10 YU YU1741/82A patent/YU40413B/xx unknown
- 1982-08-10 YU YU1742/82A patent/YU40414B/xx unknown

Also Published As

Publication number	Publication date
YU40272B (en)	1985-12-31
RO74958A (ro)	1980-10-30
IE42479L (en)	1976-08-17
BG25216A3 (en)	1978-08-10
YU173982A (en)	1983-01-21
CA1144924A (en)	1983-04-19
NZ180037A (en)	1979-11-01
AU508160B2 (en)	1980-03-13
DE2606278C2 (ro)	1989-05-03
BE838656A (fr)	1976-06-16
CH627160A5 (en)	1981-12-31
GB1548643A (en)	1979-07-18
SE7601715L (sv)	1976-08-18
YU173882A (en)	1983-01-21
YU174282A (en)	1983-01-21
YU174182A (en)	1983-01-21
IL49048A0 (en)	1976-04-30
ES445250A1 (es)	1977-06-16
US4346218A (en)	1982-08-24
FR2334669A1 (fr)	1977-07-08
DK156575B (da)	1989-09-11
NL7601613A (nl)	1976-08-19
US4160085A (en)	1979-07-03
CH630074A5 (en)	1982-05-28
SE7907812L (sv)	1979-09-20
GB1548642A (en)	1979-07-18
IL49048A (en)	1981-12-31
IL56049A0 (en)	1979-01-31
DK61976A (da)	1976-08-18
CA1095026A (en)	1981-02-03
CA1077936A (en)	1980-05-20
DD127902A5 (de)	1977-10-19
BG24949A3 (en)	1978-06-15
DD124986A5 (ro)	1977-03-23
IE42479B1 (en)	1980-08-13
DK156575C (da)	1990-02-05
AU1118176A (en)	1977-08-25
RO74936A (fr)	1980-10-30
BG24948A3 (en)	1978-06-15
DD127901A5 (de)	1977-10-19
YU40413B (en)	1985-12-31
PT64806B (en)	1977-07-07
YU38476A (en)	1983-01-21
AR225878A1 (es)	1982-05-14
NL190721B (nl)	1994-02-16
CH628030A5 (en)	1982-02-15
DD127900A5 (de)	1977-10-19
MX3818E (es)	1981-07-30
FR2334669B1 (ro)	1981-12-31
DE2606278A1 (de)	1976-08-26
US4440683A (en)	1984-04-03
YU40412B (en)	1985-12-31
CA1132547A (en)	1982-09-28
CA1136132A (en)	1982-11-23
SE434637B (sv)	1984-08-06
BG27557A4 (en)	1979-11-12
YU40414B (en)	1985-12-31
SE7907813L (sv)	1979-09-20
BG25076A3 (en)	1978-07-12
GR60437B (en)	1978-05-26
YU40411B (en)	1985-12-31
DD127899A5 (de)	1977-10-19
IL56050A0 (en)	1979-01-31
CH634579A5 (en)	1983-02-15
RO68460A (ro)	1981-08-17
SE434950B (sv)	1984-08-27
SE421691B (sv)	1982-01-25
US4079181A (en)	1978-03-14
SE444811B (sv)	1986-05-12
GB1548641A (en)	1979-07-18
IL57418A0 (en)	1979-09-30
CH628031A5 (en)	1982-02-15
SE7907811L (sv)	1979-09-20
NL190721C (nl)	1994-07-18
IL57541A0 (en)	1979-10-31
PH18022A (en)	1985-03-03

Publication	Publication Date	Title
RO75006A (ro)	1980-10-30	Procedeu pentru prepararea unor mercaptoazetidinone
RO69516A (ro)	1981-08-30	Procedeu pentru prepararea unor copolimeri grefati
RO69411A (ro)	1982-02-01	Procedeu pentru prepararea unor derivati de chinazolona
RO69617A (ro)	1980-08-15	Procedeu pentru prepararea unor 2-tetrahidrofurfuril-6,7-benzomorfani
RO70246A (ro)	1982-09-09	Procedeu pentru prepararea derivatilor de (1-fenil-2-triazoliletil)-eter
RO73511A (ro)	1981-04-30	Procedeu pentru prepararea unor derivati de pirimidona
RO75730A (ro)	1981-02-28	Procedeu pentru prepararea unor 1,2-benzizotiazol-3-one
RO69720A (ro)	1980-08-15	Procedeu pentru prepararea unor (-(perfluoracil)-n-fosfonometilglicine
RO70349A (ro)	1982-09-09	Procedeu de preparare a unor 3-piridilizoxazolidine
FR2319609A1 (fr)	1977-02-25	Procede de preparation de resorcines
IT1062629B (it)	1984-10-20	Procedimento per la produzione di cantaxantina
RO70677A (ro)	1981-11-04	Procedeu pentru prepararea unor derivati de difenilamina
RO72582A (ro)	1982-07-28	Procedeu pentru prepararea unor benzoil-uree
RO78952A (ro)	1982-04-12	Procedeu pentru prepararea unor gama-pirone
FR2303541A1 (fr)	1976-10-08	Procede de preparation de nouvelles indolylalcoylpiperidines
RO68141A (ro)	1981-08-30	Procedeu pentru prepararea unor 3a-fenildecahidroizochinoline
RO78954A (ro)	1982-04-12	Procedeu pentru prepararea unor gama-pirone
RO71258A (ro)	1982-05-10	Procedeu de preparare a unor hidroxibenzofenone substituite
AR211273A1 (es)	1977-11-15	Procendimiento de preparacion de nuevas (fenoxi-4-fenil)1-piperazinas
RO77295A (ro)	1981-06-22	Procedeu pentru prepararea unor ozicarbamati-n-sulfenilati
RO77767A (ro)	1981-11-24	Procedeu pentru prepararea unor oxadetiacefalosporine
BE842735A (fr)	1976-12-09	Procede de preparation de para-alkylphenols
RO65456A (ro)	1980-01-15	Procedeu pentru prepararea unor 6-metil-8-metilergoline substituite
RO69458A (ro)	1981-08-30	Procedeu pentru prepararea unor eteri ai acidului clavulanic
BE841768A (fr)	1976-11-16	Procede de preparation de 2-aryl-2h-benzotriazoles