The synthesis of multi-substituted 2-iminopyridines by conjugate addition of ethyl cyanoacetatederivatives to alkynyl imines has been developed. The reaction of ethyl cyanoacetatederivatives with alkynyl imines provided multi-substituted 2-iminopyridines in good yields. Also described is the transformation of 2-iminopyridines into 2-aminopyridines by deprotection of the substituent on the nitrogen
Conjugated imines and iminium salts as versatile acceptors of nucleophiles
作者:Makoto Shimizu、Iwao Hachiya、Isao Mizota
DOI:10.1039/b814930e
日期:——
development of synthetic methodologies where nucleophilicaddition reactions to imino carbons are utilized in crucial steps. This article summarizes double nucleophilicaddition reactions with alpha,beta-unsaturated aldimines, addition reactions using alkynyl imines, "umpoled" reactions of alpha-imino esters, and the use of iminium salts as reactive electrophiles.
Novel 2-Pyridone Synthesis via Nucleophilic Addition of Malonic Esters to Alkynyl Imines
作者:Iwao Hachiya、Kana Ogura、Makoto Shimizu
DOI:10.1021/ol026283c
日期:2002.8.1
[reaction: see text] A novel 2-pyridone synthesis via nucleophilic addition of malonicesters to alkynyl imines has been developed. The reaction of dialkylalkyl sodiomalonates with alkynyl imines provided 2-pyridones in good to excellent yields.