作者:H.C. Fielding、I.M. Shirley
DOI:10.1016/s0022-1139(00)80200-6
日期:1992.10
6-tetrafluorobenzoic acid (I) has been synthesised from pentafluorobenzoic acid via the oxidation of 4-mercapto-tetrafluorobenzoic acid. Reaction of I with DMF/ SOCl2 gave 1,4-ClC6F4COCl (IIA) which was converted to 1,4-ClC6F4COF (IIB) by fluoride exchange. Reaction with methanol or aniline gave respectively the methyl ester 1,4- ClC6F4CO2Me (IIIA) and anilide 1,4-ClC6F4CONHPh (IIIB). Treatment of I with PCl5
通过五巯基苯甲酸通过4-巯基-四氟苯甲酸的氧化合成4-Sulpho-2,3,5,6-四氟苯甲酸(I)。I与DMF / SOCl 2的反应得到1,4-ClC 6 F 4 COCl(IIA),通过氟化物交换将其转化为1,4-ClC 6 F 4 COF(IIB)。与甲醇或苯胺反应分别得到甲酯1,4-ClC 6 F 4 CO 2 Me(IIIA)和苯胺1,4-ClC 6 F 4 CONHPh(IIIB)。我的治疗用PCl 5产生二酰氯1,4-ClOCC 6 F 4 SO 2 Cl(IVA),其在四甘醇二甲醚中通过KF的作用转化为IIB。I与SF 4的化学计量反应得到1,4-FOCC 6 F 4 SO 2 F(IVB),而使用过量试剂则产生1,4-F 3 CC 6 F 4 SO 2 F(V)。IVB的部分水解得到1,4-HO 2 CC 6 F 4 SO2 F(VIA),将其在DMSO中脱羧,得到1,4-