Herein, the synthesis of 4-methyldecarboxyhaumanamide (9) and 4-methyldecarboxyspongolactams A (11) and C (13) is presented. (-)-Sclareol is the starting material and the chloroderivative 7 is the common intermediate. Moreover, this synthesis represents a new strategy for the preparation of pyrrolinones. (C) 2010 Elsevier Ltd. All rights reserved.
Nor-limonoid and homoisoanticopalane lactones from methyl isoanticopalate
作者:Pilar Basabe、Sergio Delgado、Isidro S. Marcos、David Diez、Alberto Diego、Mónica de Román、Francisca Sanz、J.G. Urones
DOI:10.1016/j.tet.2007.06.004
日期:2007.9
A nor-limonoid with a gamma-hydroxybutenolide group was obtained starting from the known methyl isoanticopalate. A new route for the synthesis of several lactones with a homoisoanticopalane skeleton has been opened. The stereochemistry of three intermediates was established by X-ray determination. (C) 2007 Elsevier Ltd. All rights reserved.