作者:Gaël Ung、Daniel Mendoza-Espinosa、Jean Bouffard、Guy Bertrand
DOI:10.1002/anie.201100420
日期:2011.4.26
Substitutes you can rely on: Mesoionic carbenes (MICs) are not always stable. However, the acyclic ethynylcarbamodithioate 2 formed (instead of the corresponding MIC) by deprotonation of dithiolium salt 1 underwent cyclization to its precursor under acidic conditions and reacted with a variety of transition‐metal centers to yield robust MIC complexes 3; (see scheme; Tipp=2,4,6‐triisopropylphenyl).
您可以信赖的替代品:中离子卡宾 (MIC) 并不总是稳定的。然而,通过二硫鎓盐1的去质子化形成的无环乙炔基氨基二硫代酸酯2(而不是相应的 MIC)在酸性条件下环化为其前体,并与各种过渡金属中心反应生成稳定的 MIC 配合物3;(参见方案;Tipp=2,4,6-三异丙基苯基)。