w4o-4ozO/n 53.00+ .Q) 0 19aaRrpmonhap& tion at O°C producd nbhrtirrangad trfbromfdes beside tha reuunged tribroaide dnd the ketoD 12. The structures of the products wdre d8tmaincd by IH-, 13C-MfR dam and. gingh X-r& JtruCturdl MdlySiS. The addftipn wcbamsrr, is discussed in tcrhs # cro-and endo-dtta
The isolation and structure of 6″-bromo-isoarboreol - the first bromine containing lignan
✍ Scribed by A.S.R. Anjaneyulu; A.Madhusudhana Rao; V.Kameswara Rao; L.Ramachandra Row; Andrew Pelter; Robert S. Ward
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- French
- Weight
- 174 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
✦ Synopsis
A new lignan from Gmelina arborea is shown to be (6"-bromopiperonyl)-3, 7-dioxabicyclo-[3, 3, O]-octane, containing lignan. 1, Za-dihydroxy-2e-piperonyl-6ethe first example of a bromine We have recently reported the isolation of a number of new lignans including arboreol (1) and isoarboreol (2) from G.melina arborea Linn. 1. 2 We now report the isolation from the same source of 6"-bromo-isoarboreol (for brevity designated as GA6) (3), a rare example of a halogen containing product derived from a higher plant.
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Studres on the precursors to Tyrran purple by Baker and Sutherland' led to the proposals2 that durrng ether extraction of the hypobranchial glands of Dioathazs orbita Qnelrn and other gastropod m~lluscs, 6-bromo-2-methylthromndolenmone