127966-47-6Relevant articles and documents
A preparing method of a penem medicine mercaptan branch chain
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, (2016/10/27)
A preparing method of a penem medicine mercaptan branch chain is disclosed. The method includes reacting an intermediate that is (2S,4R)-4-(3-fluorophenylthio)pyrrolidine-2-carboxylic acid with a fluorizating agent to prepare a mercaptan intermediate that is (2S,4S)-4-mercaptopyrrolidine-2-carboxylic acid, and performing amino protection and carboxyl amidation to obtain the penem medicine mercaptan branch chain that is (2S,4S)-1-p-nitrobenzyloxycarbonyl-2-(N,N-dimethylaminoacyl)-4-mercaptopyrrolidine. Compared with the prior art, the method omits a hydroxy protection step in mercaptan preparation, simplifies the synthesis route, and is high in yield, low in cost and suitable for large-scale industrial production.
Carbapenems, their preparation and use the synthesis of carbapenems
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Page/Page column 7; 9, (2008/06/13)
Pyrrolidine compound (V), in free or salt form, is new. Pyrrolidine compound of formula (V), in free or salt form, is new. Independent claims aren also included for: (1) the preparation of (V); (2) the preparation of 3-[(3S,5S)-5-carbamido-3-pyrrolidinyl]-thio substituted carbapenem compound of formula (II) comprising reaction of (V) with an amine compound of formula (NH(R1)(R2)) to give a pyrrolidine compound of formula (III); and elimination of p-nitrobenzyl- and/or p-nitrobenzylcarbonyl-protection groups from (III); and (3) preparation of a pharmaceutical composition of (II) comprising mixing (II) with solvents or auxiliary materials. Either R1, R2alkyl, H, aryl or heterocyclyl; or NR1R25-8 membered optionally saturated heterocyclic group (optionally substituted). [Image] [Image].