作者:Xuri Gao、Dennis G. Hall
DOI:10.1021/ja042827p
日期:2005.2.1
and Gram-negative activity. The first total synthesis of a member of the thiomarinol class of marine antibiotics was achieved in a remarkable global yield of 22% (from 3-boronoacrolein pinacolate). The highlight of this synthesis is the efficient catalytic enantio-, regio-, E/Z-, and diastereoselective three-component inverse electron demand Diels-Alder/allylboration sequence. This key operation provides
Thiomarinols,从细菌交替单胞菌 rava sp. 中分离出来。十一月 SANK 73390 是具有革兰氏阳性和革兰氏阴性活性的强效海洋抗生素。海洋抗生素 thiomarinol 类成员的首次全合成以 22% 的显着全球收率(来自 3-硼丙烯醛频哪酸酯)实现。该合成的亮点是高效的催化对映-、区域-、E/Z-和非对映选择性三组分逆电子需求 Diels-Alder/烯丙基硼化序列。这一关键操作提供了一个罕见的涉及无环 2-取代烯醇醚的对映选择性 HDA 反应的例子,它具有不寻常但偶然的动力学选择,有利于必要的 Z-亲二烯体。