Amine-effected cyclization of chalcone dihalides to aurones
作者:John A. Donnelly、Geraldine M. Emerson
DOI:10.1016/s0040-4020(01)87903-5
日期:1990.1
aurones was studied using cyclohexylamine and the most representative member of each class of these αβ-disubstituted ketones and α-halogeno chalcones. Overall yields of heterocyclic products were generally poor except from 4'6'-dimethoxy- and 3-nitro- substituted chalcone systems; aurones were obtained in fair yield from the former and in excellent yield from the latter. 22'-Diacetoxychalcone dibromide and