Herein, we developed an enantioselectiveaddition of aliphatic aldehydes to 2-hydroxychalcone promoted by cooperative organocatalysts, giving access to hybrid flavonoids in excellent enantioselectivities. This reaction took advantage of cycloisomerization of 2-hydroxychalcone to form a transient flavylium under the irradiation of 24 W CFL, which was trapped by the in situ generated chiral enamine intermediate
在这里,我们开发了脂族醛对2-羟基查尔酮的对映选择性加成反应,而2-羟基查耳酮则通过协同有机催化剂促进,从而以优异的对映选择性获得杂合类黄酮。该反应利用2-羟基查耳酮的环异构化在24 W CFL的照射下形成瞬时黄酮,其被原位产生的手性烯胺中间体捕获。通过与瞬时黄酮进行离子配对,手性磷酸的协同作用确保了该反应的出色结果。
Benzene-fused 6-membered oxygen-containing heterocyclic derivatives of bicyclic heteroaryls
申请人:Chen Bei
公开号:US20120289501A1
公开(公告)日:2012-11-15
The invention relates to new derivatives of formula I, wherein the substituents are as defined in the specification; to processes for the preparation of such derivatives; pharmaceutical compositions comprising such derivatives; such derivatives as a medicament; such derivatives for the treatment of a proliferative disease.