The Michael addition reaction of 1,3-dicarbonyl compounds and enones was carried out in the presence of a catalytic amount of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) in ethanol under the mild reaction condition furnished Michael adducts in excellent yield.
Azulenes and related substances—XI
作者:T.M. Jacob、P.A. Vatakencherry、Sukh Dev
DOI:10.1016/s0040-4020(01)98500-x
日期:1964.1
The polyphosphoric acid induced intramolecular acylation of lactones has been applied to the synthesis of the bicyclo [0,3,5] decane system, and the preparation of azulene, 1-methyl-, 2-methyl- and 1,3-dimethylazulene is reported.