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The regiospecific synthesis of angularly-fused xanthones via the benzannulation of 1,2-adducts derived from 3-(o-anisoyl)-4-substituted cyclobutenediones and their dithianyl derivatives

✍ Scribed by Lijun Sun; Lanny S. Liebeskind

Book ID: 104257082
Publisher: Elsevier Science
Year: 1997
Tongue: French
Weight: 193 KB
Volume: 38
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(97)00720-x

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✦ Synopsis

Described in this paper is a new synthetic approach to angularly-fused and simpler substituted xanthones that is based upon the benzannulation of 2-(o-anisoyl)-4-heteroaryl-2-cyclobutenones and 2-(2-( o-anisyl)-1,3-dithian-2-yl)-4-alkenyl-2-cyclobutenones followed by facile intramolecular loss of methanol and cyclization to the xanthone.

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