of fire: A highly efficient totalsynthesis of the title compounds features a novel benzyne‐mediated one‐pot indoline formation/cross‐coupling sequence for the construction of a highly substituted key indoline intermediate. The peripheral substituents were then introduced onto the intermediate in a modular fashion to complete the total syntheses of dictyodendrin A and B.
Concise Syntheses of Dictyodendrins A and F by a Sequential C–H Functionalization Strategy
作者:Atsushi D. Yamaguchi、Kathryn M. Chepiga、Junichiro Yamaguchi、Kenichiro Itami、Huw M. L. Davies
DOI:10.1021/ja512059d
日期:2015.1.21
Syntheses of dictyodendrins A and F have been achieved using a sequential C-H functionalization strategy. The N-alkylpyrrole core is fully functionalized by means of a rhodium(I)-catalyzed C-H arylation at the C3-position, a rhodium(II)-catalyzed double C-H insertion at the C2- and C5-positions, and a Suzuki-Miyaura cross-coupling reaction at the C4-position. The syntheses of dictyodendrins A and F were completed by formal 6p-electrocyclization to generate the pyrrolo[2,3-c]carbazole core of the natural products.