作者:Stephen Buchwald、Catharine Larsen、Kevin Anderson、Rachel Tundel
DOI:10.1055/s-2006-949625
日期:2006.11
An efficient and general protocol for the palladium-catalyzed Heck alkynylation of benzyl chlorides was developed. A catalyst system comprised of PdCl 2 (CH 3 CN) 2 and 2-dicyclohexyl-phosphino-2',4',6'-triisopropylbiphenyl (XPhos), with CS 2 CO 3 as the base, efficiently couples a wide range of functionalized terminal alkynes and substituted benzyl chlorides at 65 °C. We have also demonstrated that
开发了一种用于钯催化的苄基氯的 Heck 炔基化的高效通用方案。由 PdCl 2 (CH 3 CN) 2 和 2-二环己基-膦基-2',4',6'-三异丙基联苯 (XPhos) 组成的催化剂体系,以 CS 2 CO 3 为基础,有效地偶联了广泛的官能化末端炔烃和取代的苄基氯在 65 °C 下。我们还证明,可以选择相应的芳基丙二烯产物,以在一锅法中使用过量的碱和更高的反应温度 (80 °C)。