A double migratory cascade reaction of α-halogen-substituted propargylic phosphates to produce highly functionalized 1,3-dienes has been developed. This transformation features 1,3-phosphatyloxy group migration followed by 1,3-shifts of bromine and chlorine as well as the unprecedented 1,3-migration of iodine. The reaction is stereodivergent: (Z)-1,3-dienes are formed in the presence of a copper catalyst
α-卤素取代的炔丙
磷酸酯的双迁移级联反应已被开发出来,以生产高度功能化的 1,3-二烯。这种转变的特点是 1,3-
磷酰氧基迁移,随后是
溴和
氯的 1,3-位移以及史无前例的
碘 1,3-迁移。该反应是立体发散的:在
铜催化剂存在下形成(Z)-1,3-二烯,而
金催化的反应表现出反向立体选择性,产生相应的E产物。