enantioselective and diastereoselective dearomatization sequences starting from the benzaldehyde chromium tricarbonyl complex. Following aldol condensation, a sequence involving Pd-catalyzed allylic substitution was used in the synthesis of the (-)-enantiomer, whereas the (+)-enantiomer was reached via an Eschenmoser-Claisen rearrangement. Chiroptical data show that a revision of the previously assigned
使用对映选择性和非对映选择性脱芳构化序列从
苯甲醛三羰基
铬配合物开始合成乙酰氧基tubipofuran的两种对映异构体。在醛醇缩合之后,在 (-)-对映异构体的合成中使用了一个涉及 Pd 催化的烯丙基取代的序列,而 (+)-对映异构体是通过 Eschenmoser-Claisen 重排达到的。脊椎数据显示,需要对先前指定的
天然产物绝对构型进行修订。