Synthesis of Peptidyl Ureas Using p‐Nitrophenyl‐(9‐fluorenylmethoxy Carbonylamino)methyl Carbamate Derivatives
摘要:
An efficient synthesis of p-nitrophenyl-(9-fluorenylmethoxy, carbonylamino) methyl carbamates using isocyanates derived from Fmoc-amino acid azides and p-nitrophenol in presence of an equimolar quantity of N-ethyldiisopropyl amine is described. All the carbamates have been isolated as crystalline solids and are fully characterized. Further, their utility for the synthesis of dipeptidyl ureas has been demonstrated.
Synthesis of Peptidyl Ureas Using p‐Nitrophenyl‐(9‐fluorenylmethoxy Carbonylamino)methyl Carbamate Derivatives
摘要:
An efficient synthesis of p-nitrophenyl-(9-fluorenylmethoxy, carbonylamino) methyl carbamates using isocyanates derived from Fmoc-amino acid azides and p-nitrophenol in presence of an equimolar quantity of N-ethyldiisopropyl amine is described. All the carbamates have been isolated as crystalline solids and are fully characterized. Further, their utility for the synthesis of dipeptidyl ureas has been demonstrated.
An Efficient Conversion of the Carboxylic Group of <i>N</i>-Fmoc α-Amino Acids/Peptide Acids into <i>N</i>-Formamides Employing Isocyanates as Key Intermediates
作者:N. S. Sudarshan、N. Narendra、H. P. Hemantha、Vommina V. Sureshbabu
DOI:10.1021/jo701371k
日期:2007.12.1
[Graphics]Reaction of 96% formic acid with isocyanates derived from N-Fmoc alpha-amino acids/peptide acids catalyzed by DMAP has yielded a new class of stable formamides as crystalline solids which have been characterized by IR, H-1 NMR, C-13 NMR, and mass spectroscopy. Conversion of the side chain carboxylic acid of N-Fmoc-5-oxazolidinones of Asp/Glu into the N-formyl group also has been accomplished. The reaction is simple, mild, and high yielding.
作者:Patil, Basanagoud S.、Vasanthakumar, Ganga-Ramu、Suresh Babu, Vommina V.
DOI:——
日期:——
Suresh Babu, Vommina V.; Kantharaju, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2005, vol. 44, # 5, p. 1046 - 1053
作者:Suresh Babu, Vommina V.、Kantharaju
DOI:——
日期:——
Synthesis of Peptidyl Ureas Using <i>p</i>‐Nitrophenyl‐(9‐fluorenylmethoxy Carbonylamino)methyl Carbamate Derivatives
作者:Basanagoud S. Patil、Ganga‐Ramu Vasanthakumar、Vommina V. Suresh Babu
DOI:10.1081/scc-120039483
日期:2004.1.1
An efficient synthesis of p-nitrophenyl-(9-fluorenylmethoxy, carbonylamino) methyl carbamates using isocyanates derived from Fmoc-amino acid azides and p-nitrophenol in presence of an equimolar quantity of N-ethyldiisopropyl amine is described. All the carbamates have been isolated as crystalline solids and are fully characterized. Further, their utility for the synthesis of dipeptidyl ureas has been demonstrated.