Conformational analysis of the oxazolidine and tetrahydro-1, 3-oxazine ring of C20-diterpenoid alkaloid derivatives

…, HK Desai, J Finer-Moore, J Nowacki…

Index: Pelletier, S. William; Mody, Naresh V.; Desai, Haridutt K.; Finer-Moore, Janet; Nowacki, Jacek; Joshi, Balawant S. Journal of Organic Chemistry, 1983 , vol. 48, # 11 p. 1787 - 1796

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Abstract

Chemical and spectral data about the behavior of the oxazolidine ring of atisine and veatchine in hydrogen-bonding and non-hydrogen-bonding solvents are presented. The steric effect of the C (l6) methyl group on closure of the normal-and iso-type oxazolidine ring in various derivatives of atisine, veatchine, cuauchichicine, and garryfoline has been studied by'Q NMFt spectroscopy. The normal-type oxazolidine ring of veatchine-related ...