Enamine chemistry. Part III. Reaction of αβ-unsaturated acid chlorides with enamines of acyclic ketones. Preparation of cyclohexane-1,3-diones
作者:J. R. Hargreaves、P. W. Hickmott、B. J. Hopkins
DOI:10.1039/j39680002599
日期:——
isopropyl ketone and the dimethylamine enamine of di-isopropyl ketone gave 2,2,4-trimethyl- and 2,2,4,4-tetramethyl-cyclohexane-1,3-diones respectively. The morpholine enamine of dibenzyl ketone gave 3-morpholino-2,4-diphenyl-cyclohex-2-enone which could not be hydrolysed to the cyclohexane-1,3-dione. The mechanism of the reaction is discussed.
丙烯酰,巴豆酰和甲基丙烯酰氯与二乙基酮的吗啉烯胺反应已显示出2,4-二甲基-,2,4,5-三甲基-和2,4,6-三甲基-环己烷-1, 3-二酮。中间体取代的3-吗啉代环己基-2-烯酮已被分离并表征为其高氯酸盐。乙基异丙基酮的丙烯酰氯和吗啉烯胺和二异丙基酮的二甲基胺烯胺分别得到2,2,4-三甲基-和2,2,4,4-四甲基-环己烷-1,3-二酮。二苄基酮的吗啉烯胺得到3-吗啉代-2,4-二苯基-环己二-2-烯酮,其不能水解为环己烷-1,3-二酮。讨论了反应机理。