Reaction of β-amino-α,β-unsaturated esters and amides with aryl diazonium salts
作者:C.B. Kanner、U.K. Pandit
DOI:10.1016/s0040-4020(01)98868-4
日期:1981.1
Conjugated esters and amides react with aryldiazoniumsalts at room temperature (MeCN) to form the corresponding iminium hydrazone derivatives, which can be thermally cyclized to cinnoline-3-esters and cinnoline-3-amides. In general the intermediate iminium salts derived from the enamine amides cyclize faster than those from the enamine esters. Furthermore, the ease of cyclization depends upon the