A short route to “reverse-prenylated” pyrrolo[2,3-b]indolesvia tandem olefination and claisen rearrangement of 2-(3,3-dimethylallyloxy)indol-3-ones: First total synthesis of flustramine C
作者:Tomomi Kawasaki、Romi Terashima、Ken-ei Sakaguchi、Hiroko Sekiguchi、Masanori Sakamoto
DOI:10.1016/0040-4039(96)01690-5
日期:1996.10
1-acetyl-2-(3,3-dimethylallyloxy)indol-3-ones proceeded via tandem olefination, isomerization, Claisen rearrangement, and deacetylation to give 3-cyanomethyl-3-(1,1-dimethylallyl)indol-2-ones in good yields, which were reduced with Red-Al® to afford pyrrolo[2,3-b]indoles having the 1,1-dimethylallyl group at the 3a-position. The first total synthesis of the marine alkaloid flustramine C was also described
1-乙酰基-2-(3,3-二甲基烯丙氧基)吲哚-3-酮的Wittig或Horner-Emmons反应通过串联烯化,异构化,克莱森重排和脱乙酰化进行,得到3-氰基甲基-3-(1,1二甲基烯丙基)吲哚-2-酮以良好的收率,将其减少了与红铝®,得到吡咯并[2,3- b具有在图3a-位置1,1-二甲基烯丙基]吲哚。还描述了海洋生物碱氟他胺C的第一个全合成。