Synthesis and cycloadditions of 9H-furo[3,4-b][1]benzo(thio)pyran-9-ones: furan ring formation by a novel hydrolytically induced cycloreversion

✍ Scribed by G.Elena Daia; Christopher D. Gabbutt; John D. Hepworth; B.Mark Heron; David E. Hibbs; Michael B. Hursthouse

• Publisher: Elsevier Science
• Year: 2002
• Tongue: French
• Weight: 136 KB
• Volume: 43
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(02)00820-1

✦ Synopsis

C-2 lithiation of acetals 2 followed by trapping with aldehydes gives 3. Subsequent unmasking of the acetal function provides furobenzo(thio)pyrans 4, cycloadditions of which have been investigated.