Catalytic Chemodivergent Annulations of
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‐Aminotrifluoroacetophenone and Allenyl Imide through β’‐C−H Functionalization or β/γ‐Bisfunctionalization
Lewis base and Brønsted base controlled chemodivergent annulations of α-methyl substituted allenyl imide and o-aminotrifluoroacetophenones are realized to afford highly valuable furo[3,2-b]indol-2-ones and dihydroquinolines bearing a CF3-substituted quaternary stereogenic center. The possible reaction mechanisms are proposed through deuterium labelling experiments. This work demonstrates the unprecedented
Lewis碱和Brønsted碱控制的α-甲基取代的烯丙基酰亚胺和邻氨基三氟苯乙酮的化学发散环化被实现以提供具有CF 3 -取代的四元立体中心的非常有价值的呋喃[3,2- b ]吲哚-2-酮和二氢喹啉。通过氘标记实验提出了可能的反应机制。这项工作展示了 α-甲基取代的烯丙酰亚胺与亲电-亲核化合物在环化反应中的前所未有的双重反应性,并具有化学发散性,通过膦催化的 β'-C-H 官能化和通过布朗斯台德碱的 β/γ-双官能化转化烯丙酰亚胺催化。