Preparation of benzofurano-, benzothieno-, indolo-3-sulfolenes as precursors for heteroaromatic o-quinodimethanes
摘要:
Efficient routes have been developed for the synthesis of benzofurano-3-sulfolene 16, benzofurano-3-sulfolene 16, and N-tosylindolo-3-sulfolene 18. These compounds are ideal precursors for the corresponding heteroaromatic alpha-quinodimethanes. (C) 1997 Elsevier Science Ltd.
Preparation and Reactions of Benzofurano-, Indolo-, and Benzothieno-3-sulfolenes
摘要:
Benzofurano-, N-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 o-quinodimethanes. Derivatives of these 3-sulfolenes bearing bromo or alkyl group substitution from which substituted heteroaromatic o-quinodimethanes are generated have also been synthesized.