Synthesis of 4-[4′-bis(2″-chloroethyl)aminophenyl]-3,3,4,4-tetrafluorobutanoic acid [3,3,4,4-tetrafluorochlorambucil]
作者:Christopher W. Buss、Paul L. Coe、John Colin Tatlow
DOI:10.1016/s0022-1139(98)00127-4
日期:1998.3
Reaction of 2,2-dichloro-2-(4′-nitrophenyl)acetonitrile with mercury(II) oxide/pyridinium poly (hydrogen fluoride), (aqueous work-up), gave 2,2-difluoro-2-(4′-nitrophenyl)acetamide, from which were made the parent acid and thence its acid chloride. This and ethyl propanedioate/methyl lithium afforded ethyl 4,4-difluoro-4-(4′-nitrophenyl)-3-oxobutanoate, converted by SF4/HF into ethyl 3,3,4,4-tetra
2,2-二氯-2-(4'-硝基苯基)乙腈与氧化汞(II)/吡啶鎓聚氟化氢的反应(水处理),得到2,2-二氟-2-(4' -硝基苯基)乙酰胺,从中制得母体酸,因此得到其酰氯。该产物和丙二酸乙酯/甲基锂提供了4,4-二氟-4-(4'-硝基苯基)-3-氧代丁酸乙酯,通过SF 4 / HF转化为3,3,4,4-四氟-4-(4 '-硝基苯基)丁酸酯。然后硝基的催化氢化得到4'-胺,其使用环氧乙烷被双(羟乙基化)。利用Ph 3 P / CCl 4转化为双(氯乙基)类似物,由此进行酸性水解,得到4 [4'-双(2”-氯乙基)氨基苯基] -3,3,4,4-四氟丁酸。