trimethylenemethane donor undergoes palladium-catalyzed [6 + 3] cycloaddition with a variety of tropones to yield bicyclo[4.3.1]decadienes in excellent regio-, diastereo-, and enantioselectivity. Products of the Pd-TMM [6 + 3] cycloaddition participate in a thermal [3,3] sigmatropic rearrangement to yield bicyclo[3.3.2]decadienes in good yield.
氰基取代的三亚甲基
甲烷供体经过
钯催化的 [6 + 3] 环加成与各种托酮生成双环 [4.3.1] 癸二烯,具有出色的区域选择性、非对映选择性和对映选择性。Pd-TMM [6 + 3] 环加成产物参与热 [3,3] σ 重排,以良好的收率产生双环 [3.3.2] 癸二烯。