Legal status (The legal status 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 status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dainippon Pharmaceutical Co Ltd
Original Assignee
Dainippon Pharmaceutical Co Ltd
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.)
Filing date
Publication date
Application filed by Dainippon Pharmaceutical Co LtdfiledCriticalDainippon Pharmaceutical Co Ltd
Publication of ES442708A1publicationCriticalpatent/ES442708A1/en
Pharmaceuticals Containing Other Organic And Inorganic Compounds
(AREA)
Low-Molecular Organic Synthesis Reactions Using Catalysts
(AREA)
Abstract
A procedure for preparing new piperazine derivatives of the formula **(See formula)** in which R1 is a hydrogen atom, an alcohol group having 1 to 4 carbon atoms, a hydroxyalkyl group having 2 to 4 carbon atoms, a benzyl group, a methoxy-substituted benzyl group, a phenyl group, a propargyl group or an acyl group; and R2 is a hydrogen atom, an alcohol group having 1 to 4 carbon atoms, an alcohol group having 2 to 4 carbon atoms substituted by hydroxyl or halogen, a vinyl group, an allyl group or a benzyl group ; and its salts; which comprises hydrolyzing a compound of the formula **(See formula)** where R1 and R2 are as defined above and R'3 is an alcohol group having 1 to 6 carbon atoms; and optionally transforming the thus obtained compound of formula I into an acid addition salt or an alkaline salt by reacting it with a suitable acid or alkali. (Machine-translation by Google Translate, not legally binding)
ES75442708A1972-12-261975-11-17A procedure for preparing new piperazine derivatives. (Machine-translation by Google Translate, not legally binding)
ExpiredES442708A1
(en)
Process for preparing 7-(alpha-hydroxy-alpha-phenyl)acetamido-3-(1-methyl-1h-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid and derivatives thereof
Procedure for the preparation of new acids 4- (4-bifenilil) - 4 - hydroxibutirics, its esteres or lactonas. (Machine-translation by Google Translate, not legally binding)