78571-67-2Relevant articles and documents
Acid-Catalyzed Rearrangement of Propella-ε-lactones
Kakiuchi, Kiyomi,Tsugaru, Toshinori,Tobe, Yoshito,Odaira, Yoshinobu
, p. 4204 - 4208 (2007/10/02)
The acid-catalyzed rearrangement of - and propella-ε-lactones 9 and 10 in boiling acetic acid takes place readily to afford the 1,2-disubstituted cyclopentene 21 and cyclohexene 26 as the major products, respectively, while such lactone ring cleavage of the - and propella-δ-lactones 1 and 2 does not occur at all under similar conditions.The remarcable distinction in reactivity in the acid-catalyzed rearrangement between the ε-lactones and the δ-lactones is attributed to the effect of lactone ring size.
