作者:Fusao Kido、Youichi Tooyama、Yoshihiro Noda、Akira Yoshikoshi
DOI:10.1246/cl.1983.881
日期:1983.6.5
Annulation reaction of α-formylcaprylate (5) with 2,5-dihydro-3-phenylthio-4-vinylfuran-2-one (2), followed by dehydration, oxidation, and rearrangement, provided an epimeric mixture of 2,4,5,6-tetrahydro-6-hexyl-4-hydroxy-6-methoxycarbonylbenzofuran-2-ones (8a and 8b). From both the products, 2,3,3aβ,4,6,6aβ-hexahydro-4β-octylfuro [2,3-c] furan-2,6-dione (4b), the known synthetic precursor of (±)-avenaciolide (1) was obtained.
α-甲酰基
辛酸酯(5)与 2,5-二
氢-3-
苯硫基-4-
乙烯基呋喃-2-
酮(2)发生环化反应,然后进行
脱水、
氧化和重排,得到
2,4,5,6-四
氢-6-己基-
4-羟基-6-甲
氧羰基
苯并呋喃-2-
酮的外延混合物(8a 和 8b)。从这两种产物中得到了 2,3,3aβ,4,6,6aβ-六
氢-4β-辛基
呋喃 [2,3-c]-
2,6-二酮(4b),即已知的 (±)-avenaciolide (1) 的合成前体。