Tandem Enyne Metathesis−Metallotropic [1,3]-Shift for a Concise Total Syntheses of (+)-Asperpentyn, (−)-Harveynone, and (−)-Tricholomenyn A
作者:Jingwei Li、Sangho Park、Reagan L. Miller、Daesung Lee
DOI:10.1021/ol802675j
日期:2009.2.5
A tandem reaction sequence involving relay metathesis-induced enyne RCM and metallotropic [1,3]-shift is an effective tool to construct cyclic alkenes with embedded 1,5-dien-3-yne moieties from acyclic precursors containing a 1,3-diyne. Total syntheses of (+)-asperpentyn, (-)-harveynone, and (-)-tricholomenyn A have been accomplished by implementing this metathesis-based tandem reaction sequence as the key step.
Chemoenzymatic Synthesis of (+)-Asperpentyn and the Enantiomer of the Structure Assigned to Aspergillusol A
作者:Ping Lan、Lauren E. White、Ehab S. Taher、Prudence E. Guest、Martin G. Banwell、Anthony C. Willis
DOI:10.1021/acs.jnatprod.5b00304
日期:2015.8.28
ent-2, the enantiomer of the structure, 2, assigned to the natural product aspergillusol A are reported. Both reaction sequences employ the enzymatically derived and enantiomerically pure cis-1,2-dihydrocatechol 4 as starting material and use Sonogashira cross-coupling chemistry to install the required enyne side-chain. The 1H and 13C NMR spectroscopic data derivedfrom compound ent-2 match those reported
报道了分配给天然产物曲霉酚A的(+)-asperpentyn(1)和化合物ent - 2(结构2的对映异构体)的总合成。这两个反应序列均使用酶衍生和对映体纯的顺式-1,2-二氢邻苯二酚4作为起始原料,并使用Sonogashira交叉偶联化学方法安装所需的烯炔侧链。来自化合物ent - 2的1 H和13 C NMR光谱数据 与报道的曲霉酚A匹配,因此表明该天然产物的总体结构已正确分配,尽管其绝对立体化学仍不清楚。