A copper- and solvent-free coupling of acid chlorides with terminal alkynes catalyzed by a polystyrene-supported palladium(0) complex under aerobic conditions
A polystyrene-supported palladium(0) complex [PS-dpp-Pd(0)] is an efficient catalyst for the copper- and solvent-free acylation of terminal alkynes with different acid chlorides in the presence of triethylamine as base, giving the corresponding ynones in good yields.
Polystyrene-Supported Zinc Bromide-Ethylenediamine Complex as a Reusable and Highly Efficient Heterogeneous Catalyst for the Synthesis of α,β-Acetylenic Ketones
A polystyrene-supported zinc bromide-ethylenediamine complex was shown to be useful as a recyclable heterogeneouscatalyst for the rapid and efficient synthesis of α,β-acetylenic ketones in good-to-excellent yields by cross-coupling of acid chlorides with terminal alkynes. The catalyst is easily prepared, stable, reusable, and efficient under the reaction conditions. heterogeneous catalysis - cross-coupling
An efficient one-pot palladium- and copper-free procedure has been developed for a convenientsynthesis of 3,5 -disubstituted-1H-pyrazoles from various acid chlorides, terminalalkynes and hydrazine by a coupling reaction and cyclocondensation sequence. Acid chlorides react with terminalalkynes in the presence of silica-supported-zinc bromide to give α,β-unsaturated ynones, and in situ conversion
Stereoselective Synthesis of <i>Z</i>
-Vinyl Selenides Through the Reaction of Sodium Selenide with Organic Halides and Alkynes
作者:Renan P. Pistoia、Davi F. Back、Gilson Zeni
DOI:10.1002/ejoc.201900544
日期:2019.6.23
A stereoselectivesynthesis of Z‐vinyl selenides through the reaction of sodium selenide with organic halides, followed by the addition of alkynes was developed.