Enantioselective transformation of &agr;,&bgr;-unsaturated aldehydes using chiral organic catalysts
申请人:California Institute of Technology
公开号:US06784323B2
公开(公告)日:2004-08-31
Nonmetallic organic catalysts are provided that facilitate the enantioselective reaction of &agr;,&bgr;-unsaturated aldehydes. The catalysts are chiral imidazolidinone compounds having the structure of formula (IIA) or (IIB)
or are acid addition salts thereof, wherein, in one preferred embodiment, R1 is C1-C6 alkyl, R2 is tri(C1-C6 alkyl)-substituted methyl, R3 and R4 are hydrogen, and R5 is phenyl optionally substituted with 1 or 2 substituents selected from the group consisting of halo, hydroxyl, and C1-C6 alkyl. The chiral imidazolidinones are useful in catalyzing a wide variety of reactions, including cycloaddition reactions, Friedel-Crafts alkylation reactions, and Michael additions.
提供了非金属有机催化剂,有助于α,β-不饱和醛的对映选择性反应。这些催化剂是手性咪唑啉酮化合物,具有公式(IIA)或(IIB)的结构,或其酸加成盐,在其中,根据一种优选的实施方式,R1是C1-C6烷基,R2是三(C1-C6烷基)取代甲基,R3和R4是氢,R5是苯基,可选地被1或2个取代基取代,所述取代基选自卤素,羟基和C1-C6烷基。手性咪唑啉酮在催化各种反应中非常有用,包括环加成反应,Friedel-Crafts烷基化反应和Michael加成反应。