Synthesis of the Proposed Structure of Mucoxin via Regio- and Stereoselective Tetrahydrofuran Ring-Forming Strategies
作者:Radha S. Narayan、Babak Borhan
DOI:10.1021/jo052073c
日期:2006.2.1
1.0 × 10-2 μg/mL). The total synthesis described herein features two regio- and stereoselective THF ring-forming reactions. The 2,3,5-trisubstituted THF portion (C13−C17) was accessed using a highly regioselective cyclization of a methylene-interrupted epoxydiol, and the 2,5-disubstituted THF ring (C8−C12) was conveniently assembled via a 1,2-n-triol cyclization strategy. The spectral data of the synthetic
描述了提议的粘蛋白(1)结构的对映选择性全合成。粘液毒素是一种从卷花粘膜的生物活性叶片提取物中分离出来的无水产乙酸素,它是第一种含有羟基化三取代四氢呋喃(THF)环的产乙酸素。此天然产物是一种高度有效的和特异性的抗肿瘤抗MCF-7(乳腺癌)细胞系剂(ED 50 = 3.7×10 - 3微克/毫升相比阿霉素,ED 50 = 1.0×10 - 2微克/毫升)。本文所述的总合成具有两个区域选择性和立体选择性的THF成环反应。2,3,5-三取代的THF部分(C13-C17)使用亚甲基间断的环氧二醇的高度区域选择性环化获得,2,5,5-二取代的THF环(C8-C12)可以通过1方便地组装2-正三醇环化策略。合成材料及其两个非对映异构体的光谱数据与天然产物的报道数据不匹配。在对合成分子进行详细的光谱分析的基础上,我们认为光谱差异是由于天然产物的立体化学错配引起的。