Asymmetric Friedel-Crafts alkylation of indole with chalcones catalyzed by chiral phosphoric acids.
نویسندگان
چکیده
The reaction of indole with chalcones, to give Michael-type adducts, was found to occur with good efficiency (up to 98% yield) and moderate enantioselectivity (up to 52% e.e.) in the presence of a chiral BINOL-based phosphoric acid. Furthermore, the alkylation products can be obtained in much higher e.e.s after one only crystallization.
منابع مشابه
The highly enantioselective addition of indoles and pyrroles to isatins-derived N-Boc ketimines catalyzed by chiral phosphoric acids.
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عنوان ژورنال:
- Molecules
دوره 14 8 شماره
صفحات -
تاریخ انتشار 2009