esters and the Diels–Alder reaction. The gold catalysis permits the use of enynyl substrates without additional propargylic substitution and achieves the highly regioselective formation of less stable cyclopentadienyl esters. The regioselectivity is enabled by a bifunctional phosphine ligand, the remote aniline group of which facilitates α-deprotonation of a gold carbene intermediate. The reaction works
通过烯炔酯的串联
金催化环异构化和 Diels-Alder 反应,可以方便地获得桥接
苯甲酸酯。
金催化允许使用烯炔基底物,而无需额外的炔丙基取代,并实现了稳定性较差的
环戊二烯酯的高区域选择性形成。区域选择性由双功能
膦配体实现,其远程
苯胺基团有助于
金卡宾中间体的α去质子化。该反应适用于不同的烯烃取代模式和各种亲二烯化合物。