Facile N-Derivatization of α-Amino Esters and Amides via Benzotriazolylmethyl Derivatives
作者:Alan R. Katritzky、Nataliya Kirichenko、Boris V. Rogovoy、Hai-Ying He
DOI:10.1021/jo026622f
日期:2003.11.1
Alpha-(N-substitutedamino)esters were prepared in a two-step procedure from available unsubstituted alpha-amino esters. alpha-Amino esters are first converted into the corresponding N-benzotriazolylmethyl derivatives; in the second step, the benzotriazole group is substituted by various nucleophiles with or without the presence of a Lewis acid to give substituted alpha-amino esters in high overall
Aza-Michael reaction promoted by aqueous sodium carbonate solution
作者:Xiao-Ji Tang、Zhao-Lei Yan、Wen-Liang Chen、Ya-Ru Gao、Shuai Mao、Yan-Lei Zhang、Yong-Qiang Wang
DOI:10.1016/j.tetlet.2013.03.043
日期:2013.5
A general and efficient aza-Michael reaction promoted by aqueous sodium carbonate solution has been developed. The reaction has complete mono-alkylation selectivity and proceeds with complete chirality retention for chiral amino esters. With a broad substrate scope, a well-common catalyst and simple operation, the catalytic approach provides a facile, practicable, economical, and environmentally benign method for the synthesis of beta-amino carbonyl compounds. (c) 2013 Elsevier Ltd. All rights reserved.