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Two-dimensional NMR analysis of himachalol and its correlation with other sesquiterpenoids of the himachalane series

✍ Scribed by Om Prakash; Raja Roy; D. K. Kulshreshtha

Publisher
John Wiley and Sons
Year
1988
Tongue
English
Weight
338 KB
Volume
26
Category
Article
ISSN
0749-1581

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✦ Synopsis

High-field 'H NMR studies of himachalol (1) have been carried out by two-dimensional NMR methods. The stereochemical aspects of this molecule were studied through the application of stereospecific coupling constants, the nuclear Overhauser effect and lanthanide-induced chemical shifts. Complete and unambiguous "C chemical shift assignments of 1 have been made for the first time by using two-dimensional beteronuclear ('H-I3C) correlation NMR spectroscopy, DEPT, broad-band proton decoupling and selective heteronuclear spin decoupling "C NMR methods. Complete "C chemical shift assignments of isocentdarol, centdarol and centdarone have also been made using some of the above techniques and their stereostructures have been corrected.

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