201347-16-2

Upstream product

• 201347-15-1 N-[2-(4-Chloro-phenyl)-ethyl]-N-(4-nitro-phenyl)-malonamic acid methyl ester 
• 156-41-2 4-chlorophenylethylamine 
• 350-46-9 4-Fluoronitrobenzene 
• 201347-13-9 [2-(4-Chloro-phenyl)-ethyl]-(4-nitro-phenyl)-amine 

Downstream Products

• 201347-18-4 (3S,4R)-4-(4-Chloro-phenyl)-1-(4-nitro-phenyl)-2-oxo-pyrrolidine-3-carboxylic acid methyl ester 
• 123632-35-9 (R)-(-)-4-(4-chlorophenyl)pyrrolidin-2-one 
• 63701-55-3 (R)-(-)-baclofen hydrochloride 

Relevant academic research and scientific papers

Enantioselective synthesis of 4-substituted 2-pyrrolidinones by site- selective C-H insertion of α-methoxycarbonyl-α-diazoacetanilides catalyzed by dirhodium(II) tetrakis[N-phthaloyl-(S)-tert-leucinate]

Site- and enantioselective intramolecular C-H insertion of α- methoxycarbonyl-α-diazoacetamides has been achieved by exploiting a p- nitrophenyl group as the N-substituent and dirhodium(II) tetrakis[N- phthaloyl-(S)-tert-leucinate] as catalyst, leading to the formation of 4 substituted 2-pyrrolidinone derivatives of up to 82% ee. The efficiency of the present protocol has been verified well by a short-step synthesis of (R)- (-)-baclofen.