Copper-catalyzed synthesis of internal alkynesvia domino coupling between 1,1-dihalo-1-alkenes and arylboronic acids
作者:Hong Yan、Linhua Lu、Peng Sun、Yan Zhu、Hailong Yang、Defu Liu、Guangwei Rong、Jincheng Mao
DOI:10.1039/c2ra21577b
日期:——
We have developed the practical copper-catalyzed formation of various internal alkynes via domino couplings between 1,1-dihalo-1-alkenes and arylboronic acids in the presence of low-cost 8-hydroxylquinoline as the ligand.
Palladium-catalyzed regioselective allylation of five-membered heteroarenes with allyltributylstannane
作者:Sheng Zhang、Xiaoqiang Yu、Xiujuan Feng、Yoshinori Yamamoto、Ming Bao
DOI:10.1039/c4cc10373d
日期:——
Palladium-catalyzedallylation reactions of 2-(chloromethyl)thiophenes, 2-(chloromethyl)furans, and N-protected 2-(chloromethyl)-1H-pyrroles with allyltributylstannane were described in this study. This type of allylation reaction regioselectively occurred on the heteroarene rings to produce allylated dearomatization products or allylated heteroarenes with satisfactory yields.
Facile one-pot synthesis of diarylacetylenes from arylaldehydes <i>via</i> an addition-double elimination process
作者:Jianyang Chen、Xuan Zhang、Jiajun Wu、Rui Wang、Chunlin Lei、Yanan An
DOI:10.1039/d1ob00627d
日期:——
A practical one-pot protocol has been developed to synthesize diarylacetylenes fromarylaldehydes by treatment with 1-(arylmethyl)benzotriazoles and LiN(SiMe3)2. The reaction proceeded through imine formation, Mannich-type addition and double elimination to deliver products in up to 99% yields with broad substrate scope. In addition, gram-scale synthesis of 1-bromo-4-(phenylethynyl)benzene has been