The reaction of enolates of 1,3-dicarbonyl compounds (1) with 3,4-dibromo-2-butanone (2) afforded hydrofuran derivatives (4) or (5) in the presence of DBU in THF and the reaction was applied to the one-pot synthesis of antitumor naphthofuran natural products (29).
WATANABE MITSUAKI; BABA MITSUKI; KINSOHITA TOSHIO; FURUKAWA SUNAO, CHEM. AND PHARM. BULL, 1976, 24, NO 10, 2421-2427
作者:WATANABE MITSUAKI、 BABA MITSUKI、 KINSOHITA TOSHIO、 FURUKAWA SUNAO