Aryl and heteroaryl nosylates as stable and cheap partners for Suzuki–Miyaura cross-coupling reactions
作者:Anna Dikova、Nicolas P. Cheval、Aurélien Blanc、Jean-Marc Weibel、Patrick Pale
DOI:10.1016/j.tet.2016.02.061
日期:2016.4
Aryl and heteroaryl para-nitrophenylsulfonates (nosylates) have been successfully engaged for the first time in Suzuki–Miyaura cross-coupling reactions with various aryl or vinylboronic acids (48–98%, 12 examples). The best catalyst/ligand combination have been determined to be 2 mol % of palladium acetate (Pd(OAc)2) and 4 mol % of 2-dicyclohexylphosphino-2′,4′,6′-triisopropylbiphenyl (XPhos) using
芳基和杂芳基对硝基苯基磺酸盐(nosylates)已成功地首次与各种芳基或乙烯基硼酸进行铃木-宫浦交叉偶联反应(48-98%,12个例子)。使用K 3 PO已确定最佳催化剂/配体组合为2摩尔%的乙酸钯(Pd(OAc)2)和4摩尔%的2-二环己基膦基-2',4',6'-三异丙基联苯(XPhos)在四氢呋喃中于80°C下以4为碱。这些新的反应条件尤其提供了直接和非常有效的途径来获得天然生物碱二巴胺。