cyclization mode. Pd-catalyzed cyclization of 2-(2-alkylallyloxy)phenyl boronic acid derivatives in the presence of Selectfluor 2 provides chromanes 3 with concurrent generation of a tertiary alkyl fluoride function. A 5-exo-trig carbopalladation affords PdII intermediate A whose oxidation to PdIV followed by 1,2-aryl/PdIV dyotropic rearrangement and C−F bond-forming reductive elimination affords chromane
逆转本征环化模式。在 Selectfluor 2存在下,Pd 催化的 2-(2-烷基烯丙氧基) 苯基
硼酸衍
生物环化提供苯并三氢
呋喃3,同时生成叔烷基
氟化物功能。5 - exo -trig carbopalladation 提供 Pd II中间体A,其氧化为 Pd IV,然后进行 1,2-芳基/Pd IV变色重排和 C−F 键形成还原消除,得到苯并三氢
呋喃3。