Hmr. Hoffmann et al., NEW BICYCLIC CONJUGATES OF 3-MEMBERED AND 5-MEMBERED HETEROCYCLES WITH 5-ALKOXYFURAN-2(5H)-ONES (4-ALKOXY-DELTA(2)-BUTENOLIDES), Synthesis, (1), 1996, pp. 164
The title molecules were built up by 1,3-dipolar cycloaddition and by
palladium-catalyzed cross coupling of 4-bromofuran-2(5H)-ones with het
erocyclic stannanes.