A method for the catalytic α-arylation of indolin-3-ones was developed. The catalytic system comprising Pd(dba)2 and PAd3 was found to be optimal for the transformation. The protocol features broad functional group compatibility in that a range of arylated indoxyl derivatives bearing a fully substituted carbon center was synthesized with high efficiency. A preliminary bioassay study revealed that the
A Convenient Synthesis of 1,2-Dihydro-3<i>H</i>-indol-3-ones and 1,2-Dihydro-2<i>H</i>-indol-2-ones by Baeyer-Villiger Oxidation
作者:A. S. Bourlot、E. Desarbre、J. Y. Mérour
DOI:10.1055/s-1994-25488
日期:——
The Baeyer-Villiger rearrangement of substituted 1H-indole-3-carbaldehydes afforded the corresponding substituted 1,2-dihydro-3H-indol-3-ones. The influence of 3-carbonyl and 1-protecting groups has been examined. Reaction has been extended to 1H-indole-2-carbaldehydes and used for synthesis of 1-(phenylsulfonyl)-1H-indol-2-yl trifluoromethanesulfonate.
Treatment of 2,3-dihydro-1H-indol-3-ones with allyl alcohols in the presence of camphorsulfonic acid and magnesium sulfate at 130 °C gave, via condensation and a Claisen rearrangement, 2-allyl-2,3-dihydro-1H-indol-3-ones in good yields. The stereochemistry of the products was determined by NOE experiments.
2,3- 二氢-1H-吲哚-3-酮与烯丙基醇在樟脑磺酸和硫酸镁存在下于 130 ℃ 处理,通过缩合和克莱森重排,得到 2-烯丙基-2,3-二氢-1H-吲哚-3-酮,收率很高。通过 NOE 实验确定了产物的立体化学性质。
Palladium-catalyzed direct C(sp<sup>3</sup>)–H arylation of indole-3-ones with aryl halides: a novel and efficient method for the synthesis of nucleophilic 2-monoarylated indole-3-ones
the synthesis of nucleophilic 2-monoarylated indole-3-ones via palladium-catalyzeddirectC(sp3)–Harylation of indole-3-ones with aryl halides has been developed. Various 2-monoarylated indole-3-ones were readily obtained with yields up to 95%. As a class of important nucleophilic intermediates, 2-monoarylated indole-3-ones can be used for the construction of C2-quaternary indolin-3-one skeletons.
Reactions of substituted 2,3-dihydro-1 H -indol-3-ones and pyrrolo[2,3- b ]pyridin-3-ones with Wittig and Horner–Emmons reagents: synthesis of 7-azatryptamine
cyanomethanephosphonate for giving the corresponding (7-azaindol-3-yl)acetonitrile or more unexpectedly, a C-2 alkylated product; this behavior has been extended to another nucleophilic reagent. Finally the synthesis of 7-azatryptamine was reported.