Catalytic Anti-Markovnikov Hydroallylation of Terminal and Functionalized Internal Alkynes: Synthesis of Skipped Dienes and Trisubstituted Alkenes
作者:Melrose Mailig、Avijit Hazra、Megan K. Armstrong、Gojko Lalic
DOI:10.1021/jacs.7b02104
日期:2017.5.24
and functionalized internal alkynes. In this article, we describe the development of the reaction, exploration of the substrate scope, and a study of the reaction mechanism. Synthesis of skipped dienes through the hydroallylation of terminal alkyl and aryl alkynes with simple allyl phosphates and 2-substituted allyl phosphates is described. The hydroallylation of functionalized internal alkynes leads
作者:Pu-Sheng Wang、Hua-Chen Lin、Xiao-Le Zhou、Liu-Zhu Gong
DOI:10.1021/ol501356z
日期:2014.6.20
The first allylic C–H olefination with α-diazo esters synergistically catalyzed by a palladium(II) complex and (salen)CrCl has been established to directly generate conjugated polyene derivatives in moderate to high yields and with excellent stereoselectivities.
Nickel-Catalyzed Allylic Substitution of Simple Alkenes
作者:Ryosuke Matsubara、Timothy F. Jamison
DOI:10.1002/asia.201000875
日期:2011.7.4
This report describes a nickel‐catalyzed allylic substitution process of simplealkenes whereby an important structural motif, a 1,4‐diene, was prepared. The key to success is the use of an appropriate nickel–phosphine complex and a stoichiometric amount of silyl triflate. Reactions of 1‐alkyl‐substituted alkenes consistently provided 1,1‐disubstituted alkenes with high selectivity. Insight into the
A stereoselective, denitrative cross-coupling of β-nitrostyrenes with N-alkylpyridinium salts for the preparation of functionalized styrenes has been developed. The visible-light-induced reaction proceeds without any catalyst at ambient temperature. Broad in scope and tolerant to multiple functional groups, the moderately yielding transformation is orthogonal to several traditional metal-catalyzed
Nickel-Catalyzed Cross-Coupling of Allyl Alcohols with Aryl- or Alkenylzinc Reagents
作者:Bo Yang、Zhong-Xia Wang
DOI:10.1021/acs.joc.6b02564
日期:2017.5.5
Nickel-catalyzed cross-coupling of allylalcohols with aryl- and alkenylzinc chlorides through C–O bond cleavage was performed. Reaction of (E)-3-phenylprop-2-en-1-ol and 1-aryl-prop-2-en-1-ols with aryl- or alkenylzinc chlorides gave linear cross-coupling products. Reaction of 1-phenyl- or 1-methyl-substituted (E)-3-phenylprop-2-en-1-ol with aryl- or alkenylzinc chlorides resulted in 3-aryl/alkenyl-substituted
进行了镍醇与烯丙基氯化锌和烯基氯化锌通过C–O键裂解的镍催化交叉偶联反应。(E)-3-苯基丙-2-烯-1-醇和1-芳基丙-2-烯-1-醇与芳基或烯基氯化锌的反应得到线性交叉偶联产物。1-苯基或1-甲基取代的(E)-3-苯基丙-2-烯-1-醇与芳基或烯基氯化锌的反应生成3-芳基/烯基取代的(E)-(prop-1 -烯-1,3-二基)二苯或3-芳基/烯基取代的(E)-(丁-1-烯基)苯。烯丙醇与p -Me 2 NC 6 H 4 ZnCl的反应生成正常偶联产物4-烯丙基-N,N的混合物-二甲基苯胺及其异构化产物N,N-二甲基-4-(丙-1-烯-1-基)苯胺。