Unambiguous and complete assignments of 1H and 13C NMR chemical shifts for five clerodane diterpenes, four of them isolated from Salvia splendens (salviarin, splendidin and splenolides A and B) and one obtained by acetylation of splenolide A, are presented. The assignments are based on 2D shiftcorrelated [1H,1H–COSY, 1H,13C-gHSQC–1J(C,H) and 1H,13C-gHMBC-nJ(C,H) (n = 2 and 3)] and nuclear Overhauser effect (NOE) experiments. The conformation of the rings of these compounds is supported by the 3J(H,H) values and NOE results. Copyright 2006 John Wiley & Sons, Ltd
FONTANA G, SAVONA G, RODRIGUEZ B (2006). Complete 1H and 13C NMR assignments of clerodane diterpenoids of Salvia splendens. MAGNETIC RESONANCE IN CHEMISTRY, 44(10), 962-965 [10.1002/mrc.1869].
Complete 1H and 13C NMR assignments of clerodane diterpenoids of Salvia splendens
FONTANA, Gianfranco;SAVONA, Giuseppe;
2006-01-01
Abstract
Unambiguous and complete assignments of 1H and 13C NMR chemical shifts for five clerodane diterpenes, four of them isolated from Salvia splendens (salviarin, splendidin and splenolides A and B) and one obtained by acetylation of splenolide A, are presented. The assignments are based on 2D shiftcorrelated [1H,1H–COSY, 1H,13C-gHSQC–1J(C,H) and 1H,13C-gHMBC-nJ(C,H) (n = 2 and 3)] and nuclear Overhauser effect (NOE) experiments. The conformation of the rings of these compounds is supported by the 3J(H,H) values and NOE results. Copyright 2006 John Wiley & Sons, Ltd
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