providing the fastest reaction (corresponding to opposite slopes of the Hammett plots). All data were well described, however, by a linear relationship when using Creary radical values; the correlation could be slightly improved by using a combination of σ and values (used in ratio of 0.104 : 1). The results imply a combination of polar and free radical effects for the isomerization reaction of this specific
A novel tandem oxidative Ritter reaction/hydration/aldolcondensation of α-arylketones with substituted propiolonitriles has been developed. This protocol conveniently affords a wide range of functionalized 3-acyl-3-pyrrolin-2-ones through the efficient construction of four chemical bonds, a C–N bond, a C═C bond, and two C═O bonds, and the formation of one ring bearing an aza-quaternary center, which
Copper mediated oxidative coupling between terminal alkynes and CuCN
作者:Yihang Li、Dunfa Shi、Pengqi Zhu、Hongxing Jin、Shuo Li、Feng Mao、Wei Shi
DOI:10.1016/j.tetlet.2014.11.108
日期:2015.1
A direct oxidative cross coupling between terminal alkynes and CuCN to form 1-cyanoalkynes was reported. FeCl3 was employed as the sole additive. The reaction could be carried out under mild conditions, with moderate to good yields. (C) 2014 Published by Elsevier Ltd.
CN115974902
申请人:——
公开号:——
公开(公告)日:——
Direct synthesis of 3-halo-3-arylacrylonitriles from the addition of cyanoalkynes with alkaline metal halides
作者:Zhipeng Guan、Zhiwen Liu、Wei Shi、Hao Chen
DOI:10.1016/j.tetlet.2017.07.104
日期:2017.9
An efficient synthesis of 3-halo-3-arylacrylonitrile is described from the direct addition between cyanoalkynes and inorganic alkaline metal halides such as LiCl, LiBr and KI in good to satisfactory yields. No transition metal is needed for the synthesis of iodo- and bromo-products, although Pd catalyst is used to accelerate the chloro-product.