Palladium-Catalyzed Arylthiolation of Alkynes Enabled by Surmounting Competitive Dimerization of Alkynes
作者:Daisuke Uno、Keisuke Nogi、Hideki Yorimitsu
DOI:10.1021/acs.orglett.9b03056
日期:2019.10.18
By overcoming the unwanted catalytic dimerization of terminal alkynes, palladium-catalyzed carbothiolation of alkynes with heteroaryl sulfides has been accomplished to provide the corresponding β-heteroaryl alkenyl sulfides with high regio- and stereoselectivity. The key for the preferential arylthiolation is the use of arylsulfanyl segments, instead of alkylsulfanyl, for smooth C(heteroaryl)-SR1 bond
通过克服末端炔烃的不希望的催化二聚作用,已经实现了钯与杂芳基硫醚的炔烃羰基硫醇化反应,以提供具有高区域和立体选择性的相应β-杂芳基烯基硫醚。优先进行芳基硫基化的关键是使用芳基硫烷基片段而不是烷基硫烷基来进行顺畅的C(杂芳基)-SR1键裂解和/或不愿进行二聚化的烷基乙炔。反应在温和和中性的条件下进行,因此可以耐受各种功能。