Enantioselective transformation of α,β-unsaturated ketones using chiral organic catalysts
申请人:California Institute of Technology
公开号:US07592463B2
公开(公告)日:2009-09-22
Nonmetallic organic catalysts are provided that facilitate the enantioselective reaction of α,β-unsaturated ketones. 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 phenyl or 2-methylfuryl, 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,可以促进α,β-不饱和酮的对映选择性反应。该催化剂是手性咪唑啉酮化合物,其结构式为公式(IIA)或(IIB),或其酸加成盐,在其中,根据一种优选实施例,R1为C1-C6烷基,R2为苯基或2-甲基呋喃基,R3和R4为氢,R5为苯基,可选地被1或2个取代基所取代,所述取代基选自卤素,羟基和C1-C6烷基的群。手性咪唑啉酮在催化各种反应方面都很有用,包括环加成反应,Friedel-Crafts烷基化反应和Michael加成反应。