TOTAL ASSIGNMENT OF H-1 AND C-13 SPECTRA OF THE CHLORINATED TRITERPENOID (METHYL RI-O-ACETYLOLEAN-12-ALPHA-CHLORO-28,13-BETA-OLIDE) BY NMR-SPECTROSCOPY
Fjq. Monte et al., TOTAL ASSIGNMENT OF H-1 AND C-13 SPECTRA OF THE CHLORINATED TRITERPENOID (METHYL RI-O-ACETYLOLEAN-12-ALPHA-CHLORO-28,13-BETA-OLIDE) BY NMR-SPECTROSCOPY, Magnetic resonance in chemistry, 36(5), 1998, pp. 381-384
The current substantial interest concerning the structure elucidation
of new active natural products led to the complete H-1 and C-13 chemic
al shift assignment of a triterpenoid derivative, methyl 2 alpha,3 bet
a,24-tri-O-acetylolean-12 alpha-chloro-28,13 beta-olide, obtained afte
r acetylation and methylation of a mixture isolated from Mentha villos
a. The 2D shift-correlated NMR techniques HMBC, HMQC, COSY and NOESY w
ere used. (C) 1998 John Wiley & Sons, Ltd.