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- W4239488850 abstract "Abstract The direct enantioselective 1,4‐ and 1,8‐arylations of 7‐methide‐7 H ‐indoles and 6‐methide‐6 H ‐indoles, respectively, generated in situ from diarylmethanols, with electron‐rich arenes as nucleophiles, has been achieved in the presence of chiral phosphoric acids (CPAs). These two remote activation protocols provide an efficient approach for the construction of diverse hetero‐triarylmethanes in high yields (up to 97 %) and with excellent enantioselectivities (up to 96 %). Mechanistically inspired experiments tentatively indicate that the catalytic enantioselective 1,4‐addition as well as the formal S N 1 substitution could proceed efficiently in the similar catalytic systems. Furthermore, the modification of the catalytic system and diarylmethanol structure successfully deviates the reactivity toward a remote, highly enantioselective 1,8‐arylation reaction. This flexible activation mode and novel reactivity of diarylmethanols expand the synthetic potential of chiral phosphoric acids." @default.
- W4239488850 created "2022-05-12" @default.
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- W4239488850 date "2018-07-20" @default.
- W4239488850 modified "2023-09-26" @default.
- W4239488850 title "Chiral Phosphoric Acid Catalyzed Asymmetric Synthesis of Hetero-triarylmethanes from Racemic Indolyl Alcohols" @default.
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- W4239488850 doi "https://doi.org/10.1002/ange.201804330" @default.
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