71657-87-9

Upstream product

• 52450-32-5 Ethyl (E)-2-oxo-4-phenylpyrrolidine-3-carboxylate 
• 1217022-86-0 (3S, 4R)-(-)-4-phenyl-3-carbethoxy-2-pyrrolidinone 
• 5292-53-5 diethyl benzalmalonate 
• 185067-05-4 ethyl 2-carbethoxy-3-cyano-3-phenylpropionate 

Downstream Products

• 138812-85-8 (3S,4S)-N-<(1R)-2-Hydroxy-1-phenylethyl>-2-oxo-4-phenylpyrrolidine-3-carboxamide 
• 138782-42-0 (3R,4R)-N-<(1R)-2-Hydroxy-1-phenylethyl>-2-oxo-4-phenylpyrrolidine-3-carboxamide 
• 71657-88-0 (4R)-4-phenyl-2-pyrrolidone 
• 128372-78-1 (+)-(R)-1-tert-Butoxycarbonyl-4-phenyl-2-pyrrolidinone 
• 128372-78-1 (-)-(S)-1-tert-Butoxycarbonyl-4-phenyl-2-pyrrolidinone 
• 62624-45-7 (S)-4-phenyl-1-tosylpyrrolidin-2-one 
• 62624-46-8 (S)-(+)-3-phenylpyrrolidine 
• 61586-46-7 (-)-(R)-3-Phenylpyrrolidine 

Relevant academic research and scientific papers

Asymmetric cyanation of activated olefins with ethyl cyanoformate catalyzed by a modular titanium catalyst

"Chemical Equation Presented" Asymmetric cyanation of a class of easily available olefins with a favorable cyanide source ethyl cyanoformate (CNCOOEt) was realized by an interesting modular catalyst. High yields and ee values were obtained for a range of substrates under solvent-free and mild reaction conditions. The products obtained could be easily transformed to the enantioenriched useful intermediates 5,6, and pharmaceutically Important γ-aminobutyric acid 7.

Resolution of 4-phenyl-2-pyrrolidinone: A versatile synthetic intermediate

A resolution of 4-phenyl-2-pyrrolidinone is described. The resulting enantiomerically pure pyrrolidinones are exploited as precursor to 3-phenylpyrrolidines and 3-phenyl-γ-amino acids (4-amino-3-phenylbutanoic acid derivatives).