Reaction of 4-(N,N-Dimethylamino)-2-phenyl-2-(2-pyridyl)butanentrile and Related Compounds with Ethyl Chloroformate; Formation of Indolizinium and Quinolizinium Chlorides.
作者:Tomikazu KAWANO、Masako KURIMOTO、Minoru HATANAKA、Ikuo UEDA
DOI:10.1248/cpb.40.3067
日期:——
4-(N, N-Dialkylamino)-2-phenyl-2-(2-pyridyl)butanenitriles (10, 11 and 12) and 5-(N, N-dimethylamino)-2-phenyl-2-(2-pyridyl)pentanenitrile (13) react with ethyl chloroformate, via a cyclization-N-dealkylation process, to give indolizinium and quinolizinium salts (1 and 2). Compounds 1 and 2 are also obtained by reaction of the alcohol derivatives 14 and 15 with thionyl chloride. Reaction of 2-phenyl-2-(2-pyridyl)ethanenitrile (9) in the presence of potassium hydroxide in dimethyl sulfoxide, leading to [2-hydroxy-2-phenyl-2-(2-pyridyl)ethyl]methylsulfoxide (21), is also described.
4-(N,N-二烷基氨基)-2-苯基-2-(2-吡啶基)丁腈(10、11和12)和5-(N,N-二甲基氨基)-2-苯基-2-(2-吡啶基)戊腈(13)通过环化-N-脱烷基化过程与氯甲酸乙酯反应,生成吲哚嗪鎓和喹诺嗪鎓盐(1和2)。化合物1和2也可通过醇衍生物14和15与亚硫酰氯反应获得。在二甲基亚砜中加入氢氧化钾存在下,2-苯基-2-(2-吡啶基)乙腈(9)反应生成[2-羟基-2-苯基-2-(2-吡啶基)乙基]甲基亚砜(21)的过程也有所描述。