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Catalytic asymmetric epoxidation of α,β-unsaturated ketones using polymeric BINOL

✍ Scribed by Doss Jayaprakash; Yukari Kobayashi; Takayoshi Arai; Qiao-Sheng Hu; Xiao-Fan Zheng; Lin Pu; Hiroaki Sasai

Publisher: Elsevier Science
Year: 2003
Tongue: English
Weight: 102 KB
Volume: 196
Category: Article
ISSN: 1381-1169
DOI: 10.1016/s1381-1169(02)00644-1

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## 2-Cycloen-1 -ones / Caroate The synthesis of epoxides 3ar is achieved in excellent yields by reaction of the a,P-unsaturated ketones l a -c , 4,4'-disubstituted (E)-chalcones 1 d -0 , and 2'-hydroxy-4-substituted (E)chalcones l p -r with isolated dimethyldioxirane (2a) (as ac-etone solution) an