Caulerpenyne-Amine Reacting System as a Model forin vivo Interactions of Ecotoxicologically Relevant Sesquiterpenoids of the mediterranean-adapted tropical green seaweedcaulerpa taxifolia
作者:Antonio Guerriero、Daniela Depentori、Michele D'Ambrosio、Francesco Pietra
DOI:10.1002/hlca.19950780709
日期:1995.11.1
Caulerpenyne (1), the most abundant of the ecotoxicologically relevant sesquiterpenoids of the Mediterranean-adapted tropical green seaweed Caulerpa taxifolia, was found to react with Et3N or pyridine in MeOH by initial deprotection of C(1)HO to give oxytoxin 1 (2a), previously isolated from the sacoglossan mollusc Oxynoe olivacea. With BuNH2, without any precaution to exclude light, 1 gave the series
Caulerpenyne(1)是地中海适应性热带绿色海藻Caulerpa的最丰富的与生态毒理学相关的倍半萜类植物,其通过在C(1)HO的初始脱保护作用下与MeOH中的Et 3 N或吡啶反应生成氧毒素1(2a),先前从s豆软体动物Oxynoe olivacea中分离得到。在没有任何预防措施的情况下,使用BuNH 2时,1给出了一系列外消旋体3和4,以及非手性(4 E,6 E)-5,(4 E,6 Z)-5,(4 Z,6 E)-5和(4 Z,6 Z)-5吡咯化合物,对应于C(4)的正式取代,4,5-β消除和(E / Z)异构化C(4)C(5)和C(6)C(7)键。在黑暗中,以溶剂1形式转换为CDCl 3,通过中间体2a和3和(4 E,6 E)-5干净地得到。后者被证明易于(E / Z)-光异构化。在标准乙酰化条件下,3得到(4 E,6E)-5经乙酰胺7作为中间体。通过在C(1)处选择性脱保护1,模拟酶反应以及从自由旋转的受保护的1