4-氰基-4-(苯基氨基)哌啶-1-羧酸乙酯 | 84145-25-5

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 哌啶类
• 中文名称: 4-氰基-4-(苯基氨基)哌啶-1-羧酸乙酯
• 英文名称: 4-Cyano-4-phenylamino-piperidine-1-carboxylic acid ethyl ester
• 英文别名: Ethyl 4-cyano-4-(phenylamino)piperidine-1-carboxylate；ethyl 4-anilino-4-cyanopiperidine-1-carboxylate
• CAS: 84145-25-5
• 化学式: C₁₅H₁₉N₃O₂
• 分子量: 273.335
• InChiKey: FLFATCQHLCJCDS-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.3
• 重原子数：
  20
• 可旋转键数：
  4
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.47
• 拓扑面积：
  65.4
• 氢给体数：
  1
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  N-乙氧羰基-4-哌啶酮 在 偶氮二异丁腈 、 三正丁基氢锡 作用下， 以 溶剂黄146 、 甲苯 为溶剂， 反应 113.0h， 生成 4-氰基-4-(苯基氨基)哌啶-1-羧酸乙酯
  参考文献：
  名称：

  Conformational Switching and the Synthesis of Spiro[2H-indol]-3(1H)-ones by Radical Cyclization

  摘要：

  Radical cyclization of 1-(2-bromophenylamino)cyclohexanecarbonitriles (3, X = CH) and 4-(2-bromophenylamino)-4-piperidinecarbonitriles (3, X = N) provide spiro[2H-indole-2-cyclohexan]3(1H)-imines (5, X = CH) and spiro[2H-indole-2,4'-piperidin]-3(1H)-imines (5, X = N), respectively, in 33-57% yields. This contradicts a recent report that 1-(2-bromophenylamino)cyclohexane-carbonitrile (3, X-R-2 = CH2), treated under apparently identical conditions, led only to nitrile transfer product 6 (X-R-2 = CH2). Acidic hydrolyses of the imines provide the corresponding ketones 2 in quantitative yields. Single-crystal X-ray analyses of ketone 2e and nitrile 3e indicate that the relative configuration of the aromatic nitrogen has been inverted during the cyclization. In addition, NOE NMR analyses of spiroindolepiperidine 2e and its aniline-nitrogen-methylated analogue 10a show that the relative conformation of the piperidine ring has inverted. Thus, methylation of 2c acts as a conformational "switch" for the spiroindolepiperidine ring system.

  DOI：

  10.1021/jo970105t

文献信息

• Conformational Switching and the Synthesis of Spiro[2<i>H</i>-indol]-3(1<i>H</i>)-ones by Radical Cyclization
  作者：Richard Sulsky、Jack Z. Gougoutas、John DiMarco、Scott A. Biller

  DOI：10.1021/jo970105t

  日期：1999.7.1

  Radical cyclization of 1-(2-bromophenylamino)cyclohexanecarbonitriles (3, X = CH) and 4-(2-bromophenylamino)-4-piperidinecarbonitriles (3, X = N) provide spiro[2H-indole-2-cyclohexan]3(1H)-imines (5, X = CH) and spiro[2H-indole-2,4'-piperidin]-3(1H)-imines (5, X = N), respectively, in 33-57% yields. This contradicts a recent report that 1-(2-bromophenylamino)cyclohexane-carbonitrile (3, X-R-2 = CH2), treated under apparently identical conditions, led only to nitrile transfer product 6 (X-R-2 = CH2). Acidic hydrolyses of the imines provide the corresponding ketones 2 in quantitative yields. Single-crystal X-ray analyses of ketone 2e and nitrile 3e indicate that the relative configuration of the aromatic nitrogen has been inverted during the cyclization. In addition, NOE NMR analyses of spiroindolepiperidine 2e and its aniline-nitrogen-methylated analogue 10a show that the relative conformation of the piperidine ring has inverted. Thus, methylation of 2c acts as a conformational "switch" for the spiroindolepiperidine ring system.