E. Lattmann et Hmr. Hoffmann, FROM TETRONIC ACID AND FURFURAL TO C(4)-HALOGENATED, VINYLATED AND FORMYLATED FURAN-2(5H)-ONES AND THEIR 5-ALKOXY DERIVATIVES, Synthesis, (1), 1996, pp. 155
Tetronic acid and furfural have been elaborated into the title compoun
ds. Palladium-catalyzed cross coupling with vinylstannanes and control
led ozonolysis followed by anhydrous workup are key reactions.