Studies of Functionally Substituted Enamines: A New, One-Step Method for the Formation of Tetrahydroquinolinone and Nicotinonitrile Derivatives
作者:Saleh Al-Mousawi、Mohamed Elnagdi、Moustafa Moustafa
DOI:10.1055/s-0030-1261182
日期:2011.9
Novel rearrangement reactions leading to the formation of 2-piperidinyl-tetrahydroquinolinones were observed to occur in reactions of enaminonitrile with the 1,3-cyclohexanedione derivatives. In contrast, 2-phenyl-3-(piperidin-1-yl)acrylonitrile was observed to react with 5,5-dimethyl-1,3-cyclohexanedione to yield 7,7-dimethyl-3-phenyl-7,8-dihydroquinoline-2,5(1H,6H)-dione. While not participating in reaction with 5,5-dimethyl-1,3-cyclohexanedione, 2-benzoyl-3-(dimethylamino)acrylonitrile reacted with 3-oxo-3-phenylpropanenitrile to yield 2-benzoyl-4-[hydroxy(phenyl)-methylene]pent-2-enedinitrile and 5-benzoyl-6-hydroxy-2-phenylnicotinonitrile. The structure of 2-benzoyl-4-[hydroxy(phenyl)methylene]pent-2-enedinitrile along with other substances prepared in this effort were determined by X-ray crystallographic analysis.
观察到新型重排反应导致2-哌啶基四氢喹啉酮的形成,发生在烯酰胺腈与1,3-环己二酮衍生物的反应中。相比之下,2-苯基-3-(哌啶-1-基)丙烯腈与5,5-二甲基-1,3-环己二酮反应,生成7,7-二甲基-3-苯基-7,8-二氢喹啉-2,5(1H,6H)-二酮。虽然不与5,5-二甲基-1,3-环己二酮发生反应,但2-苯甲酰-3-(二甲氨基)丙烯腈与3-氧代-3-苯基丙腈反应,生成2-苯甲酰-4-[羟基(苯基)亚甲基]戊-2-烯二腈和5-苯甲酰-6-羟基-2-苯基尼古丁腈。这次研究中制备的2-苯甲酰-4-[羟基(苯基)亚甲基]戊-2-烯二腈及其他物质的结构通过X射线晶体学分析得到确定。