2-Arylethenyl-2′-arylethynyl sulfones: A potential source for some spiroheterocycles

✍ Scribed by Dandu Bhaskar Reddy; Nalla Reddy Chandrasekhar Babu; Venkatapuram Padmavathi

• Publisher: Journal of Heterocyclic Chemistry
• Year: 2001
• Tongue: English
• Weight: 35 KB
• Volume: 38
• Category: Article
• ISSN: 0022-152X
• DOI: 10.1002/jhet.5570380338

✦ Synopsis

Abstract

The double Michael addition of dimethyl malonate to 2‐arylethenyl‐2′‐arylethynyl sulfones (3) resulted in 3,5‐diaryl‐5,6‐dihydro‐4,4‐dimethoxycarbonyl‐1‐thiin‐1,1‐dioxides (4). The latter on cyclocondensation with urea / thiourea / hydrazine hydrate / hydroxylamine hydrochloride gave spiroheterocycles.