Nodulisporic Acid A Synthetic Studies. 1. Overall Strategy and Construction of a Western Hemisphere Subtarget
作者:Amos B. Smith、Haruaki Ishiyama、Young Shin Cho、Kazuyuki Ohmoto
DOI:10.1021/ol0168871
日期:2001.11.1
[GRAPHICS]In this, the first of two Letters, we outline our overall strategy for the construction of (+)-nodulisporic acid A (1), a representative member of a new class of indole diterpenes. In addition, we describe the efficient assembly of (-)-6, an advanced western hemisphere subtarget, comprising the ABC rings of (+)-nodulisporic acid A (1). The synthesis proceeded in 9% overall yield (longest linear sequence, 11 steps), exploiting a Shibasaki-Mori tandem transmetalation-cyclization to construct ring B.