香豆素木素 (CL) 是从多种植物中分离出来的一类天然产物。由于其独特的结构支架,它们表现出广泛的有趣的生物活性,包括保肝、抗肿瘤、抗炎和抗氧化活性等。本研究利用关键中间体10立体选择性合成了CLs (7′ S ,8′ S )- 和(7′ R ,8′ R )-sapiumin C 1 and 2 , (7′ S ,8′ S )- moluccanin 3和 (7′ S ,8′ S ) 半地亚胺4首次建立了一种用于线性 CL 立体选择性合成的通用合成方法。开发的方法包括 Mitsunobu 偶联、通过铑催化剂进行的改进的 Miyaura 芳基化以及关键成键步骤中的酸催化环化。开发的合成路线允许从相同的手性池试剂(S)-solketal合成给定天然产物的两种对映体,同时允许轻松改变此类天然产物中常见的芳香族取代和羟甲基/烯丙基羟甲基部分。
Enantioselective Synthesis of 2,3-Disubstituted Benzomorpholines: Analogues of Lignan Natural Products
作者:Eun-Kyung Jung、Lisa I. Pilkington、David Barker
DOI:10.1021/acs.joc.6b02265
日期:2016.12.2
The enantioselectivesynthesis of 2,3-disubstituted benzomorpholines, analogues of 1,4-benzodioxane natural products, has been achieved via addition of electron-rich aromatic donors to acyl-iminium ions derived from benzomorpholine aminols. Subsequent modification of the benzomorpholine scaffold allows side chains mimicking those found in 1,4-benzodioxane lignans to be added. Antiproliferative testing
Synthesis of Benzodioxane and Benzofuran Scaffolds Found in Neolignans via TMS Triflate Mediated Addition to 1,4-Benzodioxane Hemiacetals
作者:David Barker、Eun-Kyung Jung、Lisa Pilkington
DOI:10.1055/s-0036-1588939
日期:——
neolignans. This research reports the successful asymmetricsynthesis of both a 9-hydroxy-5′-methoxy-1,4-benzodioxane framework and a highly functionalised benzofuran scaffold. Both synthetically desirable structures are the result of a Lewis acid catalysed addition of an aryl nucleophile to 1,4-benzodioxane hemiacetals and offer a route towards the synthesis of a number of naturally occurring neolignans.