products in organic synthesis. The corresponding enantiomerically pure boronic esters should lead to highly flexible building blocks with a variety of applications. A detailed study towards the selective synthesis of (E)- and (Z)-vinyl derivatives starting from the known diastereo- and enantiopure cyclopropylmethanols 3 and 4 is presented. The boronic esters were activated via their trifluoroboronates;
乙烯基环丙烷是有机合成中的多功能中间体和产品。相应的对映异构纯
硼酸酯应该会产生具有多种应用的高度灵活的构建块。介绍了从已知的非对映纯和对映纯
环丙基甲醇 3 和 4 开始选择性合成 (E)- 和 (Z)-
乙烯基衍
生物的详细研究。
硼酸酯通过其三
氟硼酸盐活化;讨论了反应的优化。这项努力最终合成了 (-)-(1S,2S)-dictyopterene A (38)。(© Wiley-
VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)