An efficient and enantioselective total synthesis of naturally occurring L-783277
作者:Hwan Geun Choi、Jung Beom Son、Dong-Sik Park、Young Jin Ham、Jung-Mi Hah、Taebo Sim
DOI:10.1016/j.tetlet.2010.07.122
日期:2010.9
Naturally occurring L-783277 which belongs to 14-membered resorcylicacidlactones (RALs) turned out to be a potent kinase inhibitor against MEK (MAP kinase kinase). We successfully accomplished efficient and enantioselective total synthesis of L-783277 based on convergent assembly of one aromatic unit and two chiral building blocks with efficient orthogonal protection-deprotection strategy. Three
Asymmetric Total Syntheses of <i>ent</i>-Ascospiroketals A and B
作者:Jian Wang、Rongbiao Tong
DOI:10.1021/acs.orglett.6b00796
日期:2016.4.15
A new hypothetic biosynthesis of the tricyclic spiroketal core of ascospiroketals A and B is proposed, which guided the development of a novel synthetic strategy for the asymmetric totalsynthesis of ent-ascospiroketals A and B. The synthesis features an efficient ring contraction rearrangement of the 10-membered lactone to the tricyclic spiroketal cis-fused γ-lactone core, which served as the common
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.