Several 6,7-dioxygenated (cis or trans) labdanes have been synthesised starting front sclareol. A new strategy that allows the obtention of diols alpha-cis as well as beta-cis of trans is described. In particular, the syntheses of three natural highly functionalised labdanes in the B rings of 2, 3 and 4 with different side chains are reported. The syntheses have permitted to Correct the proposed Structure for one of them. (C) 2008 Elsevier Ltd. All rights reserved.
Synthesis of (+)-lagerstronolide from (+)-sclareol
作者:Pilar Basabe、Olga Bodero、Isidro S. Marcos、David Diez、Mónica de Román、Araceli Blanco、Julio G. Urones
DOI:10.1016/j.tet.2007.09.036
日期:2007.11
The gamma-acetoxybutenolide (+)-lagerstronolide was synthesized from (+)-sclareol, with an overall yield of 10%. The absolute stereochemistry for the natural compound (-)-lagerstronolide has been correctly established. (c) 2007 Elsevier Ltd. All rights reserved.