β3-Amino acids by nucleophilic ring-opening of N-nosyl aziridines
作者:Jaume Farràs、Xavier Ginesta、Peter W Sutton、Joan Taltavull、Frank Egeler、Pedro Romea、Fèlix Urpı́、Jaume Vilarrasa
DOI:10.1016/s0040-4020(01)00731-1
日期:2001.9
N-Nosyl aziridines can be easily prepared from1,2-aminoalcohols derived fromα-amino acids. Nucleophilic ring-opening of N-nosyl aziridines with cyanide ions followed by hydrolysis of the corresponding nitriles lead to N-nosyl β3-amino acids, which can be readily converted into a variety of derivatives bearing adequate functionality for peptide synthesis. The proposed methodology is simple, efficient
Synthesis of novel N-protected β3-amino nitriles: study of their hydrolysis involving a nitrilase-catalyzed step
作者:Maité Sylla-Iyarreta Veitía、Pierre Louis Brun、Pierre Jorda、Annie Falguières、Clotilde Ferroud
DOI:10.1016/j.tetasy.2009.07.045
日期:2009.9
Several commercially available nitrilases were investigated with regard to their potential to hydrolyze N-protected beta(3)-amino nitriles into their corresponding N-protected beta(3)-amino acids.The biotransformations were obtained in different proportions depending oil the nitrilase involved The best hydrolysis results were achieved for the N-Cbz-beta(3)-amino nitrile from i-alanine using the NIT-107, in a phosphate buffer at 0 05 M However, no biotransformation into the corresponding acids was observed for the N-sulfonylamide beta(3)-amino nitriles. Two simple and efficient procedures to prepare the beta(3)-amino nitriles from their analogous alpha-amino acids are described Thirty four new substances were synthesized and characterized over the course of this work. (C) 2009 Elsevier Ltd All rights reserved