N-Halogeno compounds. Part 18. 1-Alkyl-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane salts: user-friendly site-selective electrophilic fluorinating agents of the N-fluoroammonium class
作者:R. Eric Banks、Mohamed K. Besheesh、Suad N. Mohialdin-Khaffaf、Iqbal Sharif
DOI:10.1039/p19960002069
日期:——
4-diazabicyclo[2.2.2]octane [R–+N(CH2CH2)3N X–] or their 1:1 adducts with boron trifluoride, phosphorus pentafluoride, or sulfur trioxide in acetonitrile at ca– 35 °C. The results of site-selective electrophilic fluorination of diethyl sodio(phenyl)malonate [→PhCF(CO2Et)2], 1-morpholinocyclohexene (→2-fluoro-cyclohexanone), phenol(→2-and 4-FC6H4OH), 1-and 2-hydroxynaphthalene (→2-and 4-FC10H6OH, and 1-FC10H6OH
描述了一系列1-烷基-4-氟-1,4-二氮杂双环[2.2.2]辛烷盐[RN +(CH 2 CH 2)3 N + –F(X –)2的合成方法,其中R = CH 3,CH 2 Cl,C 2 H 5,CF 3 CH 2,C 8 H 17和(X –)2 =(TfO –)2,(BF 4 –)2,(PF 6 –)2(TfO–,BF 4 –),(TfO –,PF 6 –),(TfO –,FSO 3 –)]通过直接氟化(在with 20 mmHg的纯F 2或在1个大气压下混合F 2 –N 2)进行。 1,4-二氮杂双环[2.2.2]辛烷[R-的monoquaternary盐+ N(CH 2 CH 2) 3的N× - ]或它们的1:1加合物与三氟化硼,五氟化磷,或三氧化硫在乙腈中的CA - 35°C。丙二酸二(苯基)丙二酯[→PhCF(CO2 Et) 2 ],1-吗啉代环己烯(→2-氟环己酮),苯酚(→2-和4-FC