Journal of Organic Chemistry p. 4707 - 4709 (1994)
Update date:2022-08-05
Topics:
Yamamoto, Yoshihiko
Ohno, Masatomi
Eguchi, Shoji
4-Hydroxy-2-cyclobutenones, which were obtained by the reaction of diethyl squarate with an organolithium, reacted with lead tetraacetate (to generate an oxy radical) affording 5-acetoxy-2(5H)-furanones and 5-alkylidene-2(5H)-furanones.This type of rearrangement was realized in a simple four-membered cyclic α-ketol but not in the corresponding five-membered ring.
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