This paper describes the use of (-)-sclareol in the first synthesis of the spirolabdanolide (+)-leopersin D, which also establishes the absolute configuration of the product. The reversibility of conjugate addition/ elimination of oxaspirolabdanolide formation is demonstrated. (C) 2009 Elsevier Ltd. All rights reserved.
This paper describes the use of (-)-sclareol in the first synthesis of the spirolabdanolide (+)-leopersin D, which also establishes the absolute configuration of the product. The reversibility of conjugate addition/ elimination of oxaspirolabdanolide formation is demonstrated. (C) 2009 Elsevier Ltd. All rights reserved.