1333964-84-3

Upstream product

• 35079-19-7 trans-(1R,2R)-1,2-Bis(methoxycarbonyl)-4-oxocyclopentane 
• 1703-61-3 racemic trans-cyclopentanone-3,4-dicarboxylic acid 
• 862259-02-7 trans-(3R,4R)-3,4-bis(methoxycarbonyl)cyclopentanol 

Downstream Products

• 923604-56-2 ethyl (1R,2S)-2-ethenyl-1-({[(1R,2R,4R)-2-[hex-5-en-1-yl-(methyl)carbamoyl]-4-({7-methoxy-8-methyl-2-[4-(propan-2-yl)-1,3-thiazol-2-yl]quinolin-4-yl}oxy)cyclopentyl]carbonyl}-amino)cyclopropanecarboxylate 

Relevant academic research and scientific papers

PROCESSES AND INTERMEDIATES FOR PREPARING A MACROCYCLIC PROTEASE INHIBITOR OF HCV

A process for preparing [(1R,2R)-4-oxo-1,2-cyclopentanedicarboxylic acid II, by the resolution of racemic 4-oxo-1,2-cyclopentanedicarboxylic acid (V), said process comprising: (a) reacting 4-oxo-1,2-cyclopentanedicarboxylic acid (V) with brucine or (1R,2S)-(-)- ephedrine, thus preparing the bis-brucine or bis-(1R,2S)-(-)-ephedrine salt of (V), and (b) precipitating selectively the bis-brucine or bis-(1R,2S)-(-)-ephedrine salt of (1R,2R)-4-oxo-1,2-cyclopentanedicarboxylic acid II, while the bis-brucine or bis- (1R,2S)-(-)-ephedrine salt of [(1S,2S)-4-oxo-1,2-cyclopentanedicarboxylic acid stays in solution; (c) liberating the acid II by removal of brucine or (1R,2S)-(-)-ephedrine from the precipitated salt obtained in step (b).