Efficient total synthesis of bastadin 6, an anti-angiogenic brominated tyrosine-derived metabolite from marine sponge
作者:Naoyuki Kotoku、Hiroaki Tsujita、Atsushi Hiramatsu、Chinatsu Mori、Noriko Koizumi、Motomasa Kobayashi
DOI:10.1016/j.tet.2005.05.038
日期:2005.7
An efficient total synthesis of bastadin 6 (1), a cyclic tetramer of brominated tyrosine derivatives from the marine sponge, Ianthella basta, with selective anti-angiogenic activity, was accomplished. We developed a novel Ce(IV)-mediated oxidative coupling reaction of 2,6-dibromophenols to give the diaryl ether derivatives, the characteristic segment of 1. Condensation of two segments and subsequent
有效地全合成了bastadin 6(1),这是一种来自海洋海绵Ianthella basta的溴化酪氨酸衍生物的环状四聚体,具有选择性的抗血管生成活性。我们开发了一种新型的Ce(IV)介导的2,6-二溴苯酚的氧化偶联反应,得到特征部分为1的二芳基醚衍生物。两个片段的缩合和随后的分子内大环化在九个步骤中得到了basastin 6(1),总产率为26%。