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.
通过亚硒酸钠与有机卤化物的反应,然后添加炔烃的立体选择性合成Z-乙烯基硒化物的方法得以开发。
Efficient Consecutive Four-Component Synthesis of 5-Acylpyrid-2-ones Initiated by Copper-Free Alkynylation
作者:Jan Nordmann、Natascha Breuer、Thomas J. J. Müller
DOI:10.1002/ejoc.201300235
日期:2013.7
A one-pot, consecutive, four-componentsynthesis of 5-acylpyrid-2-onesinitiated by Pd/cataCXium® ABn catalysis proceeds under mild reaction conditions and in good yields, with a broad scope of three points of diversity. This sequence is superior to the initially proposed Pd/Cu-catalyzed version because all four components can be employed in close to stoichiometric amounts.
由 Pd/cataCXium® ABn 催化引发的 5-acylpyrid-2-one 的一锅、连续、四组分合成在温和的反应条件下以良好的收率进行,具有广泛的三点多样性。该序列优于最初提出的 Pd/Cu 催化版本,因为所有四种组分都可以以接近化学计量的量使用。