reacting alkynylmanganese compounds with acyl chlorides. The procedure is especially useful for preparing polyfunctionalized and polyunsaturated α,β-acetylenic ketones. organomanganese - acylation - acetylenic ketones - acyl chlorides
Palladium-catalyzed carbonylative Sonogashira coupling of aryl diazonium salts with formic acid as the CO source: the effect of 1,3-butadiene
作者:Fu-Peng Wu、Jin-Bao Peng、Xinxin Qi、Xiao-Feng Wu
DOI:10.1039/c7cy01773a
日期:——
An efficient carbonylative cross-coupling of aryl diazonium salts with terminal alkynes using formic acid as the CO source has been developed. Various useful alkynones were produced in moderate to good yields. Notably, 1,3-butadiene was found plays a crucial role in this transformation.
(<i>Z</i>)-Tetrahydrothiophene and (<i>Z</i>)-tetrahydrothiopyran synthesis through nucleophilic substitution and intramolecular cycloaddition of alkynyl halides and EtOCS<sub>2</sub>K
This protocol provides a novel, environmentally friendly and simple method for the synthesis of (Z)-tetrahydrothiophene derivatives using the nucleophilic thiyl radical intramolecular cycloaddition cascade process to construct C-S bonds under transition-metal-free conditions. This transformation process offers a broad substrate scope, good functional group tolerance, and excellent stereoselectivity
A Straightforward Synthesis of Ynones by Reaction of Dimethylalkynylaluminum Reagents with Acid Chlorides
作者:Baomin Wang、Martine Bonin、Laurent Micouin
DOI:10.1021/jo050760y
日期:2005.7.1
Alkynyldimethylaluminum reagents react with various aromatic and aliphatic acidchlorides in a fast and efficient way. This reaction provides a simple entry to numerous ynones, using readily available, inexpensive, and nontoxic metalating agent, and does not require any transition metal as a catalyst.