Studies toward the Synthesis of Pinolidoxin, a Phytotoxic Nonenolide from the Fungus <i>Ascochyta </i><i>p</i><i>inodes</i>. Determination of the Configuration at the C-7, C-8, and C-9 Chiral Centers and Stereoselective Synthesis of the C<sub>6</sub>−C<sub>18</sub> Fragment
作者:Lorenzo de Napoli、Anna Messere、Daniela Palomba、Vincenzo Piccialli、Antonio Evidente、Gennaro Piccialli
DOI:10.1021/jo991722f
日期:2000.6.1
homologue derived from degradation of pinolidoxin. Determination of the stereochemistry at the title chiral centers has been carried out by application of the Mosher's method both to 7a', a compound stereochemically related to 10a', and to pinolidoxin itself. The stereoselective synthesis of a protected form of the C(6)-C(18) portion of pinolidoxin, to be used in its total synthesis, has also been accomplished
通过化学和光谱方法已经确定了脂褐蛋白(1)的C-7,C-8和C-9手性中心的绝对立体化学。首先,从中观-开始,完成了四种立体异构体的完全苯甲酰化的2,3-赤-1,2,3,4-庚烷,对应于天然物质的C(6)-C(18)部分的合成。酒石酸。下一步,通过与衍生自松脂寡糖降解的“天然”同系物相关联,选择适合于绝对构型测定的具有“天然”立体化学(10a')的合成四苯甲酸酯。标题手性中心的立体化学的确定是通过对7a'(与10a'立体相关的化合物)应用Mosher方法进行的,以及去皮脂毒素本身。从其可商购的D-赤藓内酯开始也已经完成了用于脂全毒素的C(6)-C(18)部分的保护形式的立体选择性合成,该部分用于其总合成中。