Triazolinylidenes promote γ-selective C-carboxylation (up to 99 : 1 regioselectivity) in the O- to C-carboxyl transfer of furanyl carbonates in contrast to DMAP that promotes preferential α-C-carboxylation with moderate regiocontrol (typically 60 : 40 regioselectivity).
三唑啉卡宾在
呋喃基
碳酸酯的O-C羧基转移中促进γ-选择性C-羧化(高达99:1的区域选择性),而
DMAP则促进α-C羧化,但区域选择性较低(通常为60:40)。