Efficient condensation of p -substituted phenols, p -thiocresol and 2,7-dihydroxynaphthalene with malonaldehyde tetramethyl acetal in trifluoroacetic acid
作者:Ahmad Banihashemi、Ali Rahmatpour
DOI:10.1016/s0040-4020(99)00353-1
日期:1999.6
Condensation reactions of malonaldehyde tetramethyl acetal with p-substituted phenol derivatives and p-thiocresol have been carried out in trifluoroacetic acid and the corresponding methano-dibenzo[1,3]-dioxocins and dithiocin type compounds were obtained in good to excellent yields. In the case of condensation of 2,7-dihydroxynaphthalene with malonaldehyde tetramethyl acetal 8,16-methano-16H-dinaphtho[2