Abstract A new sesquiterpene, (7 R ,10 R )-carota-1,4-dienaldehyde was identified in Rosarugosaleaves, and its structure elucidated by spectroscopic and chemical methods. The new compound was markedly unstable under air exposure to give several oxidized derivatives, in which rugosal A was found as the main product due to the 1,4-diene structure. The corresponding carboxylic acid, carota-1,4-dienoic
摘要 在蔷薇叶中鉴定出一种新的倍半萜(7 R ,10 R )-carota-1,4-二烯醛,并通过光谱和化学方法对其结构进行了阐明。新化合物在空气暴露下明显不稳定,产生了几种氧化衍生物,其中由于 1,4-二烯结构,发现 rugosal A 作为主要产物。在叶子中发现了相应的羧酸,carota-1,4-二烯酸。
Identification of an intermediate in autoxidation of carota-1,4-die-14-al into rugosal A
In the autoxidation of (7R,10R)-carota-1,4-dien-14-al 1, which is a precursor of an antifungal compound rugosal A 2, in Rosa rugosa leaves, an intermediate possessing a 1,5-endoperoxy-2-hydroperoxy system 4 was isolated as a major product. The structures of compound 4 and other by-products including rugosal A 2 and rugosic acid A 3 were determined. These autoxidation products indicated the conversion pathway of compound 1 into rugosal A 2, similar to the radical reaction pathway in the autoxidation of polyunsaturated fatty acids.
Hashidoko, Yasuyuki; Tahara, Satoshi; Mizutani, Junya, Journal of the Chemical Society. Perkin transactions I, 1993, # 19, p. 2351 - 2356