Recently the isolation of a new C29 sterol, petrosterol, from the marine sponge Petrosia ficiformis has been described'.
X-ray structure of alloisolongifolol-p-nitrobenzoate : revision of the structure of alloisolongifolene, the parent hydrocarbon
β Scribed by H.R. Shitole; V.S. Dalavoy; V.B. Deodhar; U.R. Nayak; K.R. Acharya; S.S. Tavale; T.N. Guru Row; V.P. Kamat; S.K. Paknikar
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- French
- Weight
- 193 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0040-4039
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β¦ Synopsis
403 001 (India) Summary, An X-ray crystal structure analysis of alloisolongifololp-nitrobenzoate as 2 has necessitated a revision of the earlier assigned structure 2 to 2 for alloisolongifolene, the parent hydrocarbon.
IN THE RECENT assignment' of the structure 2 to alloisolongifolene, the remarkably catalyst-specific isomer of longifolene 1, the overriding
π SIMILAR VOLUMES
L O~~U.SCI sesquiterpenes were subjected to an x ray analysis ln order to determine definitively the position of the Br and Cl atoms. As a result some previously-published structures 2 had to be revised. In an earlier paper the structure and absolute configuration of a number of new polyhalogenate
The cation 2 undergoes a number of other interesting reactions (Scheme 2). Thus, treatment with a slight excess of sBu,AIH (CH,C1,, -78Β°C) affords a 2:3 mixture of the starting material and the q4-buta-l ,3-diene complex 5, which could be separated by column chromatography (A1,0, grade 11, benzene/h