Chemo- and Regioselective Direct Functional Group Installation through Catalytic Hydroxy Group Selective Conjugate Addition of Amino Alcohols to α,β-Unsaturated Sulfonyl Compounds
作者:Zhao Li、Ryo Yazaki、Takashi Ohshima
DOI:10.1021/acs.orglett.6b01464
日期:2016.7.15
A chemoselective functional group installation through catalytic hydroxy group selective conjugate addition of amino alcohols to a variety of functionalized α,β-unsaturated sulfonyl derivatives was developed. Azide group installation for clickchemistry and facile fluorescent labeling onto the less reactive hydroxy group demonstrated the synthetic utility of the present chemoselective catalysis. Moreover
Stereospecific Rearrangements during the Synthesis of Pyrrolidines and Related Heterocycles from Cyclizations of Amino Alcohols with Vinyl Sulfones
作者:Thomas G. Back、Masood Parvez、Huimin Zhai
DOI:10.1021/jo0350864
日期:2003.11.1
Conjugate additions of aminoalcohols derived from alpha-amino acids to vinyl sulfones, followed by N-benzylation, chlorination, and intramolecular alkylation, provide a convenient route to substituted pyrrolidines. The process is accompanied by the stereospecific rearrangement of substituents from the alpha-position of the amine to the beta-position of the product and takes place via the corresponding