Enantioselective transformation of alpha,beta-unsaturated ketones using chiral organic catalysts
申请人:——
公开号:US20030220507A1
公开(公告)日:2003-11-27
Nonmetallic organic catalysts are provided that facilitate the enantioselective reaction of &agr;,&bgr;-unsaturated ketones. The catalysts are chiral imidazolidinone compounds having the structure of formula (IIA) or (IIB)
1
or are acid addition salts thereof, wherein, in one preferred embodiment, R
1
is C
1
-C
6
alkyl, R
2
is phenyl or 2-methylfuryl, R
3
and R
4
are hydrogen, and R
5
is phenyl optionally substituted with 1 or 2 substituents selected from the group consisting of halo, hydroxyl, and C
1
-C
6
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-不饱和酮的对映选择性反应。这些催化剂是手性咪唑烷酮化合物,具有式(IIB)或(IIB)1的结构,或者是它们的酸加成盐,其中,在一个首选实施例中,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,可选择地与来自卤素、羟基和C1-C6烷基的1或2个取代基之一取代。这些手性咪唑烷酮在催化各种反应中很有用,包括环加成反应、弗里德尔-克拉夫斯烷基化反应和迈克尔加成反应。