To unambiguously confirm the actual product in autoxidation of salvinorin A under basic conditions, deacetyl-1,10-didehydrosalvinorin G was synthesized from salvinorin C via intermediate salvinorin H. Furthermore, oxidation of salvinorin D with manganese dioxide gave salvinorin G in good yield. (c) 2008 Elsevier Ltd. All rights reserved.
Autoxidation of Salvinorin A under Basic Conditions
作者:Thomas A. Munro、Glenn W. Goetchius、Bryan L. Roth、Timothy A. Vortherms、Mark A. Rizzacasa
DOI:10.1021/jo051813e
日期:2005.11.1
with KOH in MeOH gave the enedione 3, for which the dienone structure 7 was recently proposed. Also isolated, after methylation, were the secotriesters 4a−c. A mechanism for this unusual series of autoxidations is proposed. Surprisingly, 4a showed weak affinity at the κ-opioid receptor. Divinatorins A−C (2a−c) showed no affinity at opioid receptors. Attempted reduction of 3 to a novel salvinorin diol (9d)