Michael addition of the carbanion of the dithian on butenolide, followed by alkylation with the benzylic bromide and regeneration of the ketonic carbonyl group, gave the α,β-disubstitued lactone . Reduction of the ketonic carbonyl of the latter using NaBH4, followed by treatment with CF3CO2H and catalytic hydrogenolysis afforded (±)-α-conidendrin . DIBAL reduction of -dibenzyl (±)-α-conidendrin and
将二
噻吩的碳负离子迈克尔加成在
丁烯内酯上,然后用苄基
溴烷基化并酮酮羰基再生,得到α,β-二取代的内酯。使用NaBH 4还原后者的酮羰基羰基,然后用CF 3 CO 2 H处理并催化氢解得到(±)-α-分枝id烯。用D
IBAL还原-二苄基(±)-α-分生烯醛,然后将中间乳醇甲基化并催化氢解,得到甲基1-表-(±)-α-分生烯醛。该化合物是Cambie描述为还具有结构的甲基α-二
十二烯基差向异构体。