作者:P.Mark Jackson、Christopher J. Moody、Pritom Shah
DOI:10.1016/s0040-4039(00)82201-7
日期:1988.1
Pyrano[3,4-b]thiophen-5-ones are stable thiophene-2,3-quinodimethanes that undergo Diels-Alder reaction with alkynes to give, after loss of carbon dioxide, benzothiophenes; dibenzothiophenes can be prepared similarly from the corresponding benzothiophene-2,3-quinodimethane equivalent.