Fatutta,S. et al., Gazzetta Chimica Italiana, 1972, vol. 102, p. 1008 - 1018
作者:Fatutta,S. et al.
DOI:——
日期:——
Enamine chemistry—XVIII
作者:S. Carlsson、S.-O. Lawesson
DOI:10.1016/0040-4020(80)88057-4
日期:1980.1
Enamines (1) derived from cyclohexanone or cyclopentanone are reacted with electrophilic olefins (ethyl acrylate, ethyl 2-methylacrylate, ethyl 2-butenoate) to give the new enamines, 2. When 2 is reacted with LiAlH4, reductive cyclisation takes place giving hexahydrochromane-8a-amines of octahydrocyclopentapyrane-7a-amines, 3, in quantitative yields. 3 is hydrolyzed with dilute aqueous hydrochloric