5-Chloro-8-nitro-1-naphthoyl (NNap): A Selective Protective Group for Amines and Amino Acids
作者:Asmaa Habib、José J. Garrido-González、Estela Sánchez-Santos、Irene Boya del Teso、Francisca Sanz、Victoria Alcázar、Ángel L. Fuentes de Arriba、Joaquín R. Morán
DOI:10.1021/acs.orglett.3c01334
日期:2023.6.9
as a protective group for amines is described. Protection is carried out with an auxiliary amine or under mild Schotten-Baumann conditions in high yield (>86%), while deprotection can be achieved easily under gentle reducing conditions due to the large steric tension between C-1 and C-8 naphthalene substituents. The reaction has been successfully tested in dipeptide synthesis and amino alcohols protection
描述了 5-chloro-8-nitro-1-naphthoyl chloride 的合成及其作为胺保护基团的用途。使用辅助胺或在温和的 Schotten-Baumann 条件下进行保护,产率高 (>86%),同时由于 C-1 和 C-8 萘取代基之间的空间张力大,在温和的还原条件下可以轻松实现脱保护. 该反应已成功地在二肽合成和氨基醇保护中进行了测试,并证明它对赖氨酸的 ε-胺基团具有选择性。