T. Kawano et al., A FACILE SYNTHESIS OF 5-SUBSTITUTED 2-FURYLACETATES VIA 6-HYDROXY-3-OXO-4-HEXENOATES, Tetrahedron letters, 36(42), 1995, pp. 7685-7688
6-Substituted 3-ethoxy-6-hydroxy-2,4-hexadienoates (4) which were prep
ared by reaction of ethyl (4E)-3-ethoxy-5-formyl-2,4-pentadienoate (3a
) with nucleophiles or sodium borohydride reduction of 6-substituted 3
-ethoxy-6-oxo-2,4-hexadienoates (3b-e) have been converted in very goo
d yields into 5-substituted 2-furylacetates (5) by treating with 47%HB
r in THF.