191605-39-7Relevant academic research and scientific papers
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.
Sun, Lijun,Liebeskind, Lanny S.
, p. 3663 - 3666 (1997)
Described it, this paper is a new synthetic approach to angularlyl-fused and simpler substituted xanthones that is based upon the benzanullation 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.
