Preparation and Reactions of Benzofurano-, Indolo-, and Benzothieno-3-sulfolenes

1998-06-18T00:00:00Z (GMT) by Chung-Wen Ko Ta-shue Chou
Benzofurano-, <i>N</i>-tosylindolo-, and benzothieno-3-sulfolenes have been prepared efficiently via their dihydro analogues. These fused 3-sulfolenes serve as ideal precursors for the corresponding heteroaromatic <i>o</i>-quinodimethanes. Derivatives of these 3-sulfolenes bearing bromo or alkyl group substitution from which substituted heteroaromatic <i>o</i>-quinodimethanes are generated have also been synthesized.