439589-35-2

Upstream product

• 439589-25-0 (S)-2-[Benzyloxycarbonyl-(4-methoxy-benzyl)-amino]-3-phenyl-propionic acid (1S,2R,4R)-1-[(dicyclohexylsulfamoyl)-methyl]-7,7-dimethyl-bicyclo[2.2.1]hept-2-yl ester 
• 439589-20-5 (S)-2-[(2-Chloro-acetyl)-(4-methoxy-benzyl)-amino]-3-phenyl-propionic acid (1S,2R,4R)-1-[(dicyclohexylsulfamoyl)-methyl]-7,7-dimethyl-bicyclo[2.2.1]hept-2-yl ester 
• 439589-17-0 (S)-2-(4-Methoxy-benzylamino)-3-phenyl-propionic acid (1S,2R,4R)-1-[(dicyclohexylsulfamoyl)-methyl]-7,7-dimethyl-bicyclo[2.2.1]hept-2-yl ester 
• 439589-22-7 Cbz,PMB-Phe-OH 
• 292061-12-2 2-(4-methoxy-benzylamino)-3-phenyl-propionic acid tert-butyl ester 
• 610314-47-1 (R)-2-Benzyl-1-(4-methoxy-benzyl)-4-oxo-azetidine-2-carboxylic acid methyl ester 
• 439589-37-4 (R)-2-Benzyl-1-(4-methoxy-benzyl)-4-oxo-azetidine-2-carboxylic acid (1S,2R,4R)-1-[(dicyclohexylsulfamoyl)-methyl]-7,7-dimethyl-bicyclo[2.2.1]hept-2-yl ester 

Relevant academic research and scientific papers

Simple access to novel azetidine-containing conformationally restricted amino acids by chemoselective reduction of β-lactams

Reduction with diphenylsilane and catalytic amounts of tris(triphenylphosphine)rhodium(I) carbonyl hydride resulted in an efficient, chemoselective method for the transformation of amino-acid-derived β-lactams into the corresponding azetidines, which afte

General approach for the stereocontrolled construction of the beta-lactam ring in amino acid-derived 4-alkyl-4-carboxy-2-azetidinones.

The first general approach toward the asymmetric synthesis of 4-alkyl-4-carboxy-2-azetidinones derived from amino acids is described. The stereoselective construction of the beta-lactam ring was achieved through base-mediated intramolecular cyclization of the corresponding N(alpha)-chloroacetyl derivatives bearing (+)- or (-)-10-(N,N-dicyclohexylsulfamoyl)isoborneol as chiral auxiliary (ee up to 82%).