Dichloro[(2-dimethylamino)propyldiphenylphosphine]palladium(II) (PdCl2(alaphos)): An Efficient Catalyst for Cross-Coupling of Aryl Triflates with Alkynyl Grignard Reagents1
摘要:
Dichloro[(2-dimethylamino)propyldiphenylphosphine]palladium (PdCl2(alaphos)) was found to be much more effective as catalyst than other palladium complexes for cross-coupling of aryl triflates with alkynyl Grignard reagents. Reaction of bromoaryl triflates with alkynyl Grignard reagents in the presence of PdCl2(alaphos) catalyst gave high yields of alkynyl arene bromides, which were formed by selective replacement of triflate by alkynyl group.
吲哚[3,2- b ]咔唑呈现出具有杰出的电子结构和有趣的潜在应用的π骨架。但是,它也与模棱两可和争议有关。本文报道了吲哚[3,2- b ]咔唑的新衍生物,它们使吲哚[3,2- b ]咔唑的电子结构和新的n型有机半导体的开发成为可能。实验和计算研究表明,吲哚[3,2- b ]咔唑具有较大的局部对苯二醌二亚胺部分和显着的抗芳香性。当被(4-甲硅烷基乙炔基)苯基取代时,吲哚[3,2- b]咔唑表现出一维π–π堆积,并在溶液处理的场效应晶体管中充当n型有机半导体。
Cross‐dehydrogenativecoupling of various terminalalkynes and monohydrosilanes efficiently proceeded in the presence of gold supported on OMS‐2 (Au/OMS‐2) using O2 as a terminal oxidant, affording the corresponding alkynylsilanes in moderate to high yields (see picture). The observed catalysis was truly heterogeneous, and the catalyst could be reused at least ten times without a significant loss of
Base-mediated one-pot synthesis of alkynylsilanes from terminal alkynes and chlorosilanes
作者:Jianyang Chen、Hongmei Fu、Huamei He、Shuting Liang、Xiaofeng Luo
DOI:10.1016/j.tet.2024.133823
日期:2024.2
An efficient one-pot method has been developed to synthesize alkynylsilanes from terminalalkynes by treatment with chlorosilanes and LiN(SiMe3)2. The reaction proceeded smoothly at room temperature, showing a broad substrate scope and good functional group tolerance. The practical application was demonstrated by gram-scale reaction.