Cleavage of 2-acetyl-2-phenylazopropionanilide and related compounds by boron trifluoride. New Japp–Klingemann reactions
作者:G. C. Barrett、M. M. El-abadelah、M. K. Hargreaves
DOI:10.1039/j39700001986
日期:——
2-Acetyl, 2-cyano-, and 2-nitro-2-phenylazopropionic acid derivatives suffer cleavage of the phenylazo-grouping on treatment with boron trifluoride, giving benzenediazonium tetrafluoroborate and the corresponding difluoroboron propionic acid derivative; 2-cyano- or 2-nitro-2-phenylazoisobutyronitrile and the corresponding amides behave similarly, but 1-phenylazo-2-naphthol gives a difluoroboron salt, and
在用三氟化硼处理时,2-乙酰基,2-氰基-和2-硝基-2-苯基偶氮丙酸衍生物遭受苯基偶氮基团的裂解,得到四氟硼酸苯重氮鎓和相应的二氟硼丙酸衍生物。2-氰基或2-硝基-2-苯基偶氮异丁腈和相应的酰胺具有相似的行为,但是1-苯基偶氮-2-萘酚生成二氟硼盐,并且在处理时将2-苯基偶氮(二苯基甲基)乙酸酯环化为1,3-二苯基吲唑与三氟化硼。在尝试的酮羰基羰基缩合反应过程中,酰基-2-苯基偶氮丙酸酯的酰基丢失,并转化为相应的苯基azo;描述了扩大Japp–Klingemann反应范围的新例子。