In the presence of 5 mol% Pd(OAc)2, 1 equiv. of norbornene, and K2CO3, the reaction of 4-iodo-2-quinolones with tertiary o-bromobenzylic alcohols produced the desired benzopyran-fused 2-quinolones in moderate to high yields. A Catellani-type mechanism involving vinylic C–H cleavage is proposed based on the results of control experiments and density functional theory calculations.
在5mol%Pd(OAc)2的存在下,1当量。
降冰片烯和K 2 CO 3的作用下,4-
碘-2-
喹诺酮与叔邻
溴苄醇的反应以中等至高产率产生了所需的苯并
吡喃稠合的2-
喹诺酮。基于控制实验和密度泛函理论计算的结果,提出了一种涉及
乙烯基C–H裂解的Catellani型机理。