By the use of an N-heterocyclic carbene copper(I) complex as a catalyst, the boracarboxylation of various alkynes (e.g., diaryl alkynes, aryl/alkyl alkynes, and phenylacetylene) with a diborane compound and carbondioxide has been achieved for the first time, affording the α,β-unsaturated β-boralactone derivatives regio- and stereoselectively via a borylcupration/carboxylation cascade. Some important
METHOD FOR PREPARING MULTI-SUBSTITUTED ACRYLIC ACID COMPOUND
申请人:NATIONAL TSING HUA UNIVERSITY
公开号:US20190031591A1
公开(公告)日:2019-01-31
A method for preparing a multi-substituted acrylic acid compound includes steps as follow. A reaction solution is provided, wherein the reaction solution includes an organometallic reagent, a nickel-containing metal catalyst, a catalyst ligand, a first solvent, and the organometallic reagent is a Grignard reagent or a Gilman reagent. An addition step is conducted, wherein an alkyne compound is mixed with the reaction solution so as to undergo an addition reaction, thus an intermediate solution is obtained. A substitution step is conducted, wherein a carbon dioxide is introduced into the intermediate solution so as to obtain the multi-substituted acrylic acid compound.
Highly Selective Nickel-Catalyzed Methyl-Carboxylation of Homopropargylic Alcohols for α-Alkylidene-γ-butyrolactones
作者:Suhua Li、Shengming Ma
DOI:10.1021/ol202520x
日期:2011.11.18
A first practical Ni(0)-catalyzed highly stereoselective methyl-carboxylation of homopropargylic alcohols with ZnMe2 and CO2 for the efficient synthesis of alpha-alkylidene-gamma-butyrolactones is described. The reaction may be applied to other alkynols.
THE PREPARATION OF SOME CHLOROMETHYLINDENES AND THE DETERMINATION OF THEIR REACTIVITIES TOWARDS SODIUM IODIDE<sup>1</sup>