Catalytic Generation of Rhodium Silylenoid for Alkene–Alkyne–Silylene [2 + 2 + 1] Cycloaddition
作者:Toshimichi Ohmura、Ikuo Sasaki、Michinori Suginome
DOI:10.1021/acs.orglett.9b00326
日期:2019.3.15
2 + 1] cycloaddition takes place in the rhodium-catalyzed reaction of 1,6-enynes with borylsilanes bearing an alkoxy group on the silicon atoms, which react as synthetic equivalents of silylene. The reaction proceeds efficiently in 1,2-dichloroethane at 80–110 °C in the presence of a rhodium catalyst bearing bis(diphenylphosphino)methane (DPPM) as a ligand to afford 1-silacyclopent-2-enes in good to
烯烃-炔烃-亚甲基[2 + 2 +1]的环加成反应是在铑催化的1,6-炔烃与在硅原子上带有烷氧基的硼烷基硅烷的反应中进行的,这些硅烷作为合成的甲硅烷基等效物进行反应。在载有双(二苯基膦基)甲烷(DPPM)作为配体的铑催化剂存在下,反应在80-110°C的1,2-二氯乙烷中有效进行,从而以高收率或高收率得到1-silacyclopent-2-enes。