N-Halogeno compounds. Part 15. Synthesis of N-fluoroquinuclidinium salts via direct fluorination of quinuclidine-Lewis acid adducts, and a comparison of their “F+” transfer capabilities
作者:R.Eric Banks、Mohamed K. Besheesh
DOI:10.1016/0022-1139(95)03356-4
日期:1996.2
Fluorine smoothly attacks quinuclidine-trifluoroborane, quinuclidine-pentafluorophosphorane, and quinuclidine-sulfur trioxide in acetonitrile at −35 °C to give the corresponding N-fluoroquinuclidinium salts NFQ+X− (X− BF4−, PF6−, and FSO3− respectively; Q = quinuclidine). Like its tetrafluoroborate analogue (NFQ+BF4−), the hexafluorophosphate NFQ+PF6− can also prepared by direct fluorination of quinuclidine
氟顺利攻击奎宁环三氟硼烷,奎宁环-pentafluorophosphorane,和在乙腈中的奎宁环-三氧化硫在-35℃下,得到相应的Ñ -fluoroquinuclidinium盐NFQ + X -(X - BF 4 -,PF 6 - ,和FSO 3 -分别; Q =奎宁环)。像它的四氟硼酸盐类似物(NFQ + BF 4 - ),六氟磷酸盐NFQ + PF 6 -也可以通过奎宁环的直接氟化来制备在适当的钠盐的存在(的NaPF 6)。到四氟硼酸盐替代路线涉及治疗NFQ + ˚F -与三氟化硼。甲氧基苯[→1-氟-2-和4-甲氧基苯],2-羟基萘(→1-氟-2-羟基萘和1,1-二氟-2-氧代-1, 2-二氢萘),2-硝基丙-2-基-锂(→2-氟-2-硝基丙烷)和二钠代(苯基)丙二酸二乙酯[→二氟(苯基)丙二酸二乙酯]与所有NFQ的+ X -所提及的盐以上,再加三氟甲磺酸酯(X - CF 3