An N → N′-benzyl migration during the formation of some (trifluoro-methyl)imidazo[4,5-]quinolines
作者:Ian G. Moores、Eric F.V. Scriven、Robert K. Smalley、Hans Suschitzky
DOI:10.1016/s0022-1139(00)81550-x
日期:1988.11
Photolysis of 8-azidoquinoline in dioxan-benzylamine followed by cyclisation of the resulting 7-amino-8-benzylaminoquinoline (1a) in hot trifluoroacetic acid gave a mixture of isomeric 2-(trifluoromethyl)imidazoquinolines. The structures of these isomers have been established by spectroscopic data and by alternative synthesis from unambiguously prepared 7-amino-8-benzyl-amino-(1a) and from 8-amino
8-叠氮喹啉在二恶烷-苄胺中的光解,然后将所得的7-氨基-8-苄基氨基喹啉(1a)在热三氟乙酸中环化,得到异构体2-(三氟甲基)咪唑并喹啉的混合物。这些异构体的结构已通过光谱数据和分别由明确制备的7-氨基-8-苄基氨基-(1a)和8-氨基-7-苄基氨基喹啉(4c)的替代合成而建立,如预期的那样1-苄基-2-(三氟甲基)咪唑并[4,5-h]喹啉(2a)(6%)和预期的和重排的1-苄基-2-(三氟甲基)咪唑并[5,4-h]喹啉(3a )(52%)。注意到在乙酸和甲酸的存在下以及与其他烷基氨基基团的该N→N'烷基重排的实例。