The synthesis of ynamides in water was achieved by a micellarcatalysis strategy using rosin‐based surfactant APGS‐550‐M, which can be easily prepared from natural abundant biomass.
Copper-Catalyzed Ficini [2 + 2] Cycloaddition of Ynamides
作者:Hongyan Li、Richard P. Hsung、Kyle A. DeKorver、Yonggang Wei
DOI:10.1021/ol101418d
日期:2010.9.3
The Ficini [2 + 2] cycloaddition using N-sulfonyl-substituted ynamides is described, featuring the utility of CuCl2 and AgSbF6 as catalysts. This work represents the first successful example of ynamides participating in a thermal [2 + 2] cycloaddition with enones.
Yttrium-Catalyzed Tandem Intermolecular Hydroalkoxylation/Claisen Rearrangement
作者:Bo Zhou、Long Li、Xin Liu、Tong-De Tan、Jinxian Liu、Long-Wu Ye
DOI:10.1021/acs.joc.7b01612
日期:2017.10.6
An efficient yttrium-catalyzed tandem intermolecular hydroalkoxylation/Claisenrearrangement has been developed, providing various γ,δ-unsaturated amides in generally good to excellent yields. Importantly, high Z/E selectivity and diastereoselectivity were achieved. Other notable features of this method include widespread availability of the substrates, compatibility with a broad range of functional
Brønsted acid-catalyzed α-halogenation of ynamides from halogenated solvents and pyridine-N-oxides
作者:Seung Woo Kim、Tae-Woong Um、Seunghoon Shin
DOI:10.1039/c6cc10286g
日期:——
The keteniminium ions generated from the protonation of ynamides formed reversible adducts with counter anions and pyridine-N-oxides as well as halogenated solvents. Above 80 oC, the halonium ions selectively undergo...
to highly substituted 1-naphthol and 2-naphthol derivatives via Lewis acids catalyzed annulations of ynamides with acylchlorides are described here. A one-pot synthesis of 4-amino-2-naphthol derivatives is accomplished via a ZnI2-catalyzed tandem Friedel–Crafts reaction sequence. While in the presence of Pd(0) catalyst, a [2 + 2] cycloaddition reaction of ynamides with monosubstituted ketenes that