Novel  Cinchona ‐Aminobenzimidazole Bifunctional Organocatalysts | Zendy

Zhang Lei | Zendy; Lee MyoungMo | Zendy; Lee SooMi | Zendy; Lee Jihye | Zendy; Cheng Maosheng | Zendy; Jeong ByeongSeon | Zendy; Park Hyeunggeun | Zendy; Jew Sangsup | Zendy

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Novel Cinchona ‐Aminobenzimidazole Bifunctional Organocatalysts

Author(s) -

Zhang Lei,

Lee MyoungMo,

Lee SooMi,

Lee Jihye,

Cheng Maosheng,

Jeong ByeongSeon,

Park Hyeunggeun,

Jew Sangsup

Publication year - 2009

Publication title -

advanced synthesis and catalysis

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.541

H-Index - 155

eISSN - 1615-4169

pISSN - 1615-4150

DOI - 10.1002/adsc.200900787

Subject(s) - bifunctional , chemistry , cinchona alkaloids , cinchona , malonate , organocatalysis , organic chemistry , trifluoromethyl , lewis acids and bases , enantioselective synthesis , catalysis , dimethyl malonate , michael reaction , alkyl

Efficient Cinchona ‐derived chiral 2‐aminobenzimidazole catalysts were prepared by the coupling of 5,7‐bis(trifluoromethyl)‐2‐chlorobenzimidazole with C(9 S )‐aminodihydroquinine or C(9 R )‐aminodihydroquinidine and successively applied to the Michael addition of dimethyl malonate to nitroolefins as very efficient chiral Lewis acid bifunctional organocatalysts (up to >99% ee ).

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