提出了一种新的假生物合成方法,即合成螺帽动物A和螺帽B的三环螺帽动物核心,它指导了新的合成策略,用于合成不对称的对映体螺帽动物A和螺帽B。该合成具有有效的10位环收缩重排的特点。成员内酯形成三环螺旋酮体顺式融合的γ-内酯核,这是最后一步通过Stille偶联反应合成对乙酰氨基酮体A和B的通用中间体。另外,7个非对映体准备决定性确认的结构耳鼻喉科-ascospiroketal B.
Convergent stereospecific synthesis of C292 (or LL-Z1640-2), and hypothemycin. Part 1
作者:Patrice Sellès、Robert Lett
DOI:10.1016/s0040-4039(02)00870-5
日期:2002.5
The stereospecific synthesis of the precursors required for the 14-membered ring formation either via an intramolecular Suzuki coupling or via an intermolecular Suzuki coupling followed by a macrolactonisation is herein reported. One-pot Suzuki couplings were here achieved with vinyldisiamylboranes which were generated in situ from the related chiral precursor. The present convergent approach of C292 (or LL-21640-2) and hypothemycin gives a flexible access to related macrolides. (C) 2002 Elsevier Science Ltd. All rights reserved.