Ni-Catalyzed Regioselective Hydrocarboxylation of Alkynes with CO2 by Using Simple Alcohols as Proton Sources
摘要:
A mild and user-friendly Ni-catalyzed regioselective hydrocarboxylation of alkynes with CO2 (1 bar) is described. This protocol is characterized by a wide scope While obviating the need for sensitive organometallic, species and by an unprecedented regioselectivity pattern using simple alcohols as proton sources.
Multi-Metal-Catalyzed Oxidative Radical Alkynylation with Terminal Alkynes: A New Strategy for C(sp<sup>3</sup>)–C(sp) Bond Formation
作者:Shan Tang、Yichang Liu、Xinlong Gao、Pan Wang、Pengfei Huang、Aiwen Lei
DOI:10.1021/jacs.8b02745
日期:2018.5.9
for C(sp3)-C(sp) cross-coupling with terminalalkynes has been developed by using a multi-metal-catalyzed reaction strategy. Alkyl radicals generated from different approaches are able to couple with terminalalkynes by judicious selection of the catalyst combination. This reaction protocol offers an efficient alternative approach for the synthesis of substituted alkynes from terminalalkynes besides
α‐Amino Radical Halogen Atom Transfer Agents for Metallaphotoredox‐Catalyzed Cross‐Electrophile Couplings of Distinct Organic Halides
作者:Xianhai Tian、Jaspreet Kaur、Shahboz Yakubov、Joshua P. Barham
DOI:10.1002/cssc.202200906
日期:2022.8.5
Cross coupling: A practical dual Ni/photoredox catalyzed cross-electrophile coupling of organic halides by employing readily available α-amino radicals as halogenatom transfer agents is reported. Both coupling partners can be flexibly chosen as limiting reactant to forge 6 different types of C−C bond for a broad scope of applications (>70 examples) including late-stage functionalizations of pharmaceutical
交叉偶联:报道了一种实用的双 Ni/光氧化还原催化的有机卤化物的交叉亲电子偶联,通过使用容易获得的 α-氨基作为卤素原子转移剂。可以灵活选择两种偶联伙伴作为限制反应物,形成 6 种不同类型的 CC 键,用于广泛的应用(>70 示例),包括药物化合物的后期功能化。该反应可以批量和连续流动进行扩展。
Pd-Catalyzed Domino Synthesis of Internal Alkynes Using Triarylbismuths as Multicoupling Organometallic Nucleophiles
作者:Maddali L. N. Rao、Deepak N. Jadhav、Priyabrata Dasgupta
DOI:10.1021/ol1004164
日期:2010.5.7
The domino coupling reaction of 1,1-dibromo-1-alkenes with triarylbismuth nucleophiles has been demonstrated to furnish disubstituted alkynes directly under catalytic palladium conditions. The couplings of triarylbismuths as multicoupling nucleophiles with 3 equiv of 1,1-dibromo-1alkenes are very fast, affording high yields of alkynes in a short reaction time. Thus, an efficient domino process has been accomplished using 1,1-dibromo-1-alkenes as surrogates for internal alkyne synthesis in couplings with triarylbismuths in a one-pot operation.