Weinreb amides into difluoromethylketones with a formal nucleophilic CHF2 transfer agent is reported. Activating TMSCHF2 with potassium tert-amylate enables a convenient access to the difluorinated homologation reagent, which adds to the acylating partners. The high chemoselectivity showcased in the presence of variously multifunctionalized Weinreb amides, jointly with uniformly high yields, enables the
据报道,Weinreb酰胺与正式的亲核
CHF2转移剂同化为二
氟甲基酮。用叔淀粉
戊酸钾激活TMS 可以方便地获得二
氟同系化试剂,从而增加了酰化伙伴。在各种多功能的Weinreb酰胺的存在下展现出的高
化学选择性以及均一的高收率,使得该策略可普遍适用,而无需任何假定的碳负离子稳定化元素。