Ring substituted thieno-o-quinodimethanes via electrophilic substitution reactions of thieno-3-sulfolene
作者:Ta-shue Chou、Chia-Tien Wang
DOI:10.1016/0040-4020(96)00725-9
日期:1996.9
Thieno-3-sulfolene 6 has been treated with several electrophiles at very mild temperatures to give substituted derivatives 7a-d. Thermolysis of these substituted 3-sulfolenes at 170–210°C leads to the formation of the corresponding o-quinodimethanes 8a-d which can be trapped as Diels-Alder cycloadducts.