We present the first example of visible-light-mediated multicomponent annulation of 1,7-diynes by taking advantage of quadruple cleavage olf carbon-halogen bonds of BrCCl3 to generate a C1 synthon, which was adeptly applied to the preparation of skeletally diverse 3-benzoyl-quinolin-2(1H)-one acetates in moderate to good yields. Controlled experiments demonstrated that H2O acted as both oxygen and
我们提出了可见光介导的 1,7-二炔多组分环化的第一个例子,通过利用 BrCCl3 的
碳-卤素键的四重裂解来生成 C1 合成子,该合成子被熟练地应用于制备骨架多样的 3-
苯甲酰基
喹啉-2(1H)-
酮乙酸酯,产率中等至良好。对照实验表明,
H2O既是
氧源又是
氢源,偕二
氯乙烯基羰基化合物是该过程中的关键
中间体。机制途径涉及Kharasch型加成/6-exo-dig环化/1,5-(SN”)-取代/消除/双亲核1,6-加成/质子转移/互变异构序列。