In our earlier studies (1), we proposed to formulate (-) luteoskyrin, C30H22012,m.p. 281Β°(decomp.),[q/D -880'. a hepatotoxic yellow pigment of Penicillium islandicum Soap (NRRL 1036, UD and E strains) as (I), and (+)rugulosin, C30H22010,m.p. 290Β°(decomp.),1dD +492\*, a yellow pigment isolated from P
The structure of lumiluteoskyrin, a photoreaction product of luteoskyrin
β Scribed by Shujiro Seo; Ushio Sankawa; Yukio Ogihara; Shoji Shibata
- Publisher
- Elsevier Science
- Year
- 1969
- Tongue
- French
- Weight
- 136 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
β¦ Synopsis
Lumiluteoskyrin, C30H20012, dark reddish purple crystals, m.p.7 360Β°, was obtained from luteoskyrin, C30H22012, yellow crystals, m.p.>360Β°,isolated from Penicillium islandicum Sopp, on exposing its acetonic solution under sunlight. In 1961 (1) a structural formula was forwarded for lumiluteoskyrin(1) on the basis of the old structural formula of luteoskyrin (II) (2).
π SIMILAR VOLUMES
Recently we proposed (1) new structures of rugulosin (I), a pigment of enicillium rugulosum Thorn and some other fungi, luteoskyrin (II) and rubroskyrin (III), the pigments of p,. islandicum Sopp. The evidence for the structural formulae was provided mostly by the NMR spectral analysis of these comp
By means of 2D NMR experiments (COSY, HMQC, HMBC, ROESY), the constitution of the photoreaction product 3-deoxo-1a,3 a-diacetoxy-1,2,3,3,8,30-hexahydro-18bH-andirobin (2), obtained by photolysis of 7-deacetoxy-7-oxokhivorin (1) in methanol, was shown to be a ring B seco-limonoid with the 14,15-epoxi