Synthesis of the Conjugated Tetraene Acid Side Chain of Mycolactone E by Suzuki-Miyaura Cross-Coupling Reaction of Alkenyl Boronates
作者:Yuan Wang、Wei-Min Dai
DOI:10.1002/ejoc.201301484
日期:2014.1
The conjugated tetraene acid side chain of mycolactone E has been synthesized by the cross-coupling reaction of a trisubstituted triene bromide with a trisubstituted alkenyl boronate catalyzed by Pd(OAc)2–Aphos-Y under mildly basic conditions [K3PO4·3H2O, H2O, tetrahydrofuran (THF), 35 °C, 18 h]. The conjugated tetraene product was obtained in 85 % yield without geometrical isomer(s) under the catalytic
在弱碱性条件 [K3PO4·3H2O, H2O,四氢呋喃 (THF),35 °C,18 小时]。在催化条件下,共轭四烯产物以 85% 的产率获得,不含几何异构体。这些结果表明,由 Pd(OAc)2–Aphos-Y 催化的烯基卤化物与烯基硼酸酯的偶联与 CuI 催化的区域选择性和立体选择性炔烃硼酸化相结合,为获得共轭多烯分子提供了一种有效的合成工具。