96034-61-6

Upstream product

• 130625-70-6 (2S,4R)-2-dimethylaminocarbonyl-4-mesyloxy-1-p-nitrobenzyloxycarbonylpyrrolidine 
• 34832-35-4 sodium thioacetate 
• 130625-69-3 (2S,4R)-1-p-Nitrobenzyloxycarbonyl-2-dimethylaminocarbonyl-4-hydroxypyrrolidine 
• 51-35-4 4R-4-hydroxyproline 
• 4457-32-3 4-nitrobenzyl chloroformate 
• 96034-57-0 (2S,4R)-4-Hydroxy-1-(4-nitrobenzyloxycarbonyl)pyrrolidine-2-carboxylic acid 
• 10387-40-3 potassium thioacetate 

Downstream Products

• 96036-02-1 p-nitrobenzyl (4R,5S,6S)-3-<(3S,5S)-5-dimethylaminocarbonyl-1-(p-nitrobenzyloxycarbonyl)pyrrolidin-3-ylthio>-6-<(1R)-1-hydroxyethyl>-4-methyl-7-oxo-1-azabicyclo<3.2.0>hept-2-en-2-carboxylate 
• 96036-03-2 meropenem 
• 936226-36-7 bi[(2S,4S)-2-dimethylaminocarbonyl-1-PNZ-pyrrolindin-4-yl]disulfide 
• 96034-64-9 (2S,4S)-1-p-nitrobenzyloxycarbonyl-2-dimethylaminocarbonyl-4-thiolpyrrolidine 

Relevant academic research and scientific papers

AN IMPROVED PROCESS FOR THE PREPARATION OF MEROPENEM

The present invention provides an improved process for the preparation of methyl carbapenem derivative of formula (I) or its pharmaceutically acceptable salts or hydrates thereof in a pure form.

A PROCESS FOR THE PREPARATION OF THE INTERMEDIATE OF Β-METHYL CARBAPENEM

A process of preparation of the intermediate of β-methyl carbapenem is disclosed, in which 4-acetylazacyclobutanone as the raw material is firstly reacted with α-bromopropionamide having a big inductive group. Since this reaction is highly stereoselectivity, most of the product is the required parent nucleus of β-methyl carbapenem, a product of β-configuration. Compared with the prior art, the process of the present invention is highly-yielding, cost-effective and can be used for large scale production.

A PROCESS FOR THE PREPARATION OF MEROPENEM

The invention relates to a process for the preparation of meropenem, a β-methylcarbopenem. The said process comprises the following steps: preparing the compound of Formula (XI) from the compound of Formula (IV) through three steps "one-pot process"; then condensing the compound of Formula (XI) with the compound of Formula (XX) to form the compound of Formula (XXIV); finally preparing meropenam of Formula (I) from the compound of Formula (XXIV) by deprotection reaction by means of catalyst. The process of the invention is easily to carry out, the product is isolated in high content and yield, and the cost is reduced, thereby overcoming the shortage of the prior art.