C–N Bond Formation from Allylic Alcohols via Cooperative Nickel and Titanium Catalysis
作者:S. Hadi Nazari、Norma Tiempos-Flores、Kelton G. Forson、Jefferson E. Bourdeau、David J. Michaelis
DOI:10.1021/acs.joc.8b01474
日期:2018.9.7
Amination of allylicalcohols is facilitated via cooperative catalysis. Catalytic Ti(O-i-Pr)4 is shown to dramatically increase the rate of nickel-catalyzed allylic amination, and mechanistic experiments confirm activation of the allylicalcohol by titanium. Aminations of primary and secondary allylicalcohols are demonstrated with a variety of amine nucleophiles. Diene-containing substrates also cyclize
Method for producing allyl compound, and ether or ester compound produced thereby
申请人:MITSUBISHI CHEMICAL CORPORATION
公开号:US20040147757A1
公开(公告)日:2004-07-29
A method for producing an allyl compound having a compositional formula different from that of an allyl starting material compound, which comprises reacting the allyl starting material compound with an oxygen nucleophilic agent in the presence of a catalyst containing at least one transition metal compound containing a transition metal selected from the group consisting of transition metals belonging to Group 8 to Group 10 of the Periodic Table and a multidentate phosphite compound.
Ligand-Controlled Cobalt-Catalyzed Transfer Hydrogenation of Alkynes: Stereodivergent Synthesis of <i>Z</i>- and <i>E-</i>Alkenes
作者:Shaomin Fu、Nan-Yu Chen、Xufang Liu、Zhihui Shao、Shu-Ping Luo、Qiang Liu
DOI:10.1021/jacs.6b04271
日期:2016.7.13
Herein, we report a novel cobalt-catalyzed stereodivergent transfer hydrogenation of alkynes to Z- and E-alkenes. Effective selectivity control is achieved based on a rational catalyst design. Moreover, this mild system allows for the transfer hydrogenation of alkynes bearing a wide range of functional groups in good yields using catalyst loadings as low as 0.2 mol %. The general applicability of this
在此,我们报告了一种新型的钴催化的炔烃立体发散转移氢化反应生成 Z-和 E-烯烃。基于合理的催化剂设计实现有效的选择性控制。此外,这种温和的系统允许使用低至 0.2 mol% 的催化剂负载量以良好的产率对带有广泛官能团的炔烃进行转移氢化。该程序的普遍适用性通过合成 50 多种具有良好化学和立体选择性的烯烃而突出。初步机理研究表明,E-烯烃产物是通过连续炔烃氢化得到 Z-烯烃中间体,然后是 Z 到 E 烯烃异构化过程产生的。
Electrochemical Synthesis of Allylic Amines from Terminal Alkenes and Secondary Amines
作者:Diana J. Wang、Karina Targos、Zachary K. Wickens
DOI:10.1021/jacs.1c11763
日期:2021.12.29
electrophilic adduct between thianthrene and the alkene substrates. Treatment of these adducts with aliphatic amine nucleophiles and base provides allylic amine products in high yield. This synthetic strategy is also amenable to functionalization of feedstock gaseous alkenes at 1 atm. In the case of 1-butene, high Z-selective crotylation is observed. This strategy, however, is not limited to the synthesis of
amination of allylicalcohols with primary and secondary amines catalyzed by a system made of [Ni(1,5‐cyclooctadiene)2] and 1,1′‐bis(diphenylphosphino)ferrocene was effectively enhanced by adding nBu4NOAc and molecular sieves, affording the corresponding allyl amines in high yield with high monoallylation selectivity for primary amines and high regioselectivity for monosubstituted allylicalcohols. Such remarkable
通过添加n Bu 4 NOAc和分子筛,可以有效地增强由[Ni(1,5-环辛二烯)2 ]和1,1'-双(二苯基膦基)二茂铁构成的体系催化的伯胺和仲胺对烯丙基醇的直接胺化作用。得到高产率的相应烯丙基胺,对伯胺具有高的单烯丙基化选择性,对单取代的烯丙基醇具有高的区域选择性。的如此显着加性效应Ñ卜4 NOAC通过分离和表征一些镍配合物,表现中性电荷的五配位η的关键作用阐明3与较早在烯丙基取代反应中报道的常见阳离子四配位复合物相反,本系统中的乙酸烯丙基乙酸酯络合物。