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Low Molecular Weight Sulphur Containing Natural Products. by J. Wróbel

By J. Wróbel

Low Molecular Weight Sulphur Containing common items includes plenary lectures offered on the overseas Symposium on Low Molecular Weight Sulphur Containing usual items held at Jablonna, Warsaw on July 12-16, 1976.
This ebook includes six papers separated as chapters. issues comprise low molecular weight sulfur-containing compounds in nature; oxidation of a few biologically lively and comparable sulfur containing compounds; and the α-mercapto-α-amino acids and dehydro amino acids. this article additionally explores houses of sulfur containing nuphar alkaloids; new features of the chemistry of biotin and of a few analogs; and the glucosinolates.

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Chem. Soc. 95, 6493 (1973). 12. S. S. Shannon and A. Taylor, J. Chem. Soc. (London) C, 2044 (1968). 13. E. H. Kiltz and E. Nebelin, Hoppe - Sey le r ' s Z. Physiol. Chem. 354, 810 (1973). 14. G. Cooper, J. Am. Chem. Soc. 94, 1018 (1972). 15. W. , Springer Verlag Wien-New York (1970). 16. J. Marchand, M. Pais, X. -Xavier Jarreau, Tetrahedron 25, 937 (1969). 17. R. D. Boeck, M. L. E. M. M. G. Whitney, J. Am. Chem. Soc. 93, 2308 (1971). 18. H. Poisel and U. Schmidt, Angew. Chem. 1976, in p r e s s .

Howell, £. Org. Chem. 2£» 3703 (1971). 21. T. F. C. Can. · Chem. » 2714 (1974). 22. T. I-M. J. F. Wong and G. Lee, J.. Med. Chem. 19, 214 (1976). 23. F. T. LaLonde, Phytochemistry 9. 1851 (1970). 24. I. B. T. Wrobel, A. Iwanow and W. Starzec, Can. J_. Chem. 52, 2705 (1974). 25. T. Wong, J[· Org, Chem. , 291 (1976). 26. T. F. Wong, £. Org. Chem. 38, 3225 (1974). 27. T. S.. Clearing House Fed. Sei. Tech. , PB Re£. 1970, No. 192810 (Chem. Abs. » 39208b (1971)). 28. P. T. J. F. · pharm. Sei. , 826 (1973).

Since the absolute configuration of (-)deoxynupharidine had been determined (10), the CD curves of _31 and ^3_2 established the correlation between the sign and wavelength of the CD bands and the configuration at C-7. Both of the immonium perchlorates derived from 15. 29. displayed a positive CD band at 296 nm while the immonium perchlorate of 6,6f-dihydroxythionuphlutine B, ^6, gave a negative band at 308 nm. These results, in comparison with the CD of immonium perchlorates from Q and _3£ established the absolute configurations of the thiaspirane hemiaminals.

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