439589-27-2

Upstream product

• 439589-24-9 (S)-2-[Benzyloxycarbonyl-(4-methoxy-benzyl)-amino]-3-phenyl-propionic acid (1R,2S,4S)-1-[(dicyclohexylsulfamoyl)-methyl]-7,7-dimethyl-bicyclo[2.2.1]hept-2-yl ester 
• 439589-14-7 (S)-2-Benzyloxycarbonylamino-3-phenyl-propionic acid (1R,2S,4S)-1-[(dicyclohexylsulfamoyl)-methyl]-7,7-dimethyl-bicyclo[2.2.1]hept-2-yl ester 
• 439589-16-9 (S)-2-(4-Methoxy-benzylamino)-3-phenyl-propionic acid (1R,2S,4S)-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 
• 133010-22-7 benzyl (S)-(1-fluoro-1-oxo-3-phenylpropan-2-yl)carbamate 
• 99295-72-4 (+)-(1R,2S,4S)-N,N-dicyclohexyl-7,7-dimethyl-2-hydroxybicyclo[2.2.1]heptane-1-methanesulfonamide 
• 439589-19-2 (S)-2-[(2-Chloro-acetyl)-(4-methoxy-benzyl)-amino]-3-phenyl-propionic acid (1R,2S,4S)-1-[(dicyclohexylsulfamoyl)-methyl]-7,7-dimethyl-bicyclo[2.2.1]hept-2-yl ester 

Downstream Products

• 113890-23-6 (S)-α-benzylaspartic acid 
• 439589-18-1 (S)-2-(4-Methoxy-benzylamino)-propionic acid (1R,2S,4S)-1-[(dicyclohexylsulfamoyl)-methyl]-7,7-dimethyl-bicyclo[2.2.1]hept-2-yl ester 
• 439589-15-8 (S)-2-Benzyloxycarbonylamino-propionic acid (1R,2S,4S)-1-[(dicyclohexylsulfamoyl)-methyl]-7,7-dimethyl-bicyclo[2.2.1]hept-2-yl ester 
• 439589-21-6 (S)-2-[(2-Chloro-acetyl)-(4-methoxy-benzyl)-amino]-propionic acid (1R,2S,4S)-1-[(dicyclohexylsulfamoyl)-methyl]-7,7-dimethyl-bicyclo[2.2.1]hept-2-yl ester 
• 439589-30-7 (S)-1-(4-Methoxy-benzyl)-2-methyl-4-oxo-azetidine-2-carboxylic acid (1R,2S,4S)-1-[(dicyclohexylsulfamoyl)-methyl]-7,7-dimethyl-bicyclo[2.2.1]hept-2-yl ester 
• 439589-16-9 (S)-2-(4-Methoxy-benzylamino)-3-phenyl-propionic acid (1R,2S,4S)-1-[(dicyclohexylsulfamoyl)-methyl]-7,7-dimethyl-bicyclo[2.2.1]hept-2-yl ester 
• 439589-14-7 (S)-2-Benzyloxycarbonylamino-3-phenyl-propionic acid (1R,2S,4S)-1-[(dicyclohexylsulfamoyl)-methyl]-7,7-dimethyl-bicyclo[2.2.1]hept-2-yl ester 
• 439589-26-1 (S)-2-[Benzyloxycarbonyl-(4-methoxy-benzyl)-amino]-propionic acid (1R,2S,4S)-1-[(dicyclohexylsulfamoyl)-methyl]-7,7-dimethyl-bicyclo[2.2.1]hept-2-yl ester 
• 439589-24-9 (S)-2-[Benzyloxycarbonyl-(4-methoxy-benzyl)-amino]-3-phenyl-propionic acid (1R,2S,4S)-1-[(dicyclohexylsulfamoyl)-methyl]-7,7-dimethyl-bicyclo[2.2.1]hept-2-yl ester 
• 99295-72-4 (+)-(1R,2S,4S)-N,N-dicyclohexyl-7,7-dimethyl-2-hydroxybicyclo[2.2.1]heptane-1-methanesulfonamide 
• 439589-31-8 (S)-2-Benzyl-1-(4-methoxy-benzyl)-4-oxo-azetidine-2-carboxylic acid 

Relevant academic research and scientific papers

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%).