rel-(2R,4S)-4-hydroxy-4-methyl-1,2-piperidinedicarboxylic acid dimethyl ester | 135690-78-7

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: rel-(2R,4S)-4-hydroxy-4-methyl-1,2-piperidinedicarboxylic acid dimethyl ester
• 英文别名: cis-4-hydroxy-4-methyl-1,2-piperidinedicarboxylic acid dimethyl ester
• CAS: 135690-78-7
• 化学式: C₁₀H₁₇NO₅
• 分子量: 231.249
• InChiKey: URCVWOCXFUZMOK-OIBJUYFYSA-N

物化性质

• 沸点：
  323.0±42.0 °C(Predicted)
• 密度：
  1.229±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  0.14
• 重原子数：
  16.0
• 可旋转键数：
  1.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.8
• 拓扑面积：
  76.07
• 氢给体数：
  1.0
• 氢受体数：
  5.0

反应信息

• 作为产物：
  描述：

  methyl N-(3-methyl-3-butenyl)carbamate 在 吡啶 、 4-二甲氨基吡啶 、 四氯化锡 、 碳酸氢钠 作用下， 以 苯 为溶剂， 反应 25.0h， 生成 rel-(2R,4S)-4-hydroxy-4-methyl-1,2-piperidinedicarboxylic acid dimethyl ester
  参考文献：
  名称：

  Tin tetrachloride-induced π-cyclizations of glycine cation equivalents to substituted pipecolic acid derivatives

  摘要：

  Cationic pi-cyclization reactions of N-(3-alkenyl)-N-(methoxycarbonyl)acetoxyglycine esters induced by tin tetrachloride in dichloromethane are described. Reactions started and quenched with water at -78-degrees-C mainly yield cis-4-hydroxypipecolic esters, whereas reactions quenched after warm-up to room temperature provide trans-4-chloropipecolic esters as major products. A mechanistic scheme is advanced which adequately explains these results. The essentials are a rapid cationic aza-Cope equilibrium of the incipient iminium cation, and participation of the ester moiety through formation of a relatively stable bicyclic dioxycarbenium cation as pivotal intermediate.

  DOI：

  10.1016/s0040-4020(01)86443-7

文献信息

• Formic acid-induced π-cyclization of glycine cation equivalents to substituted pipecolic acid derivatives
  作者：Peter M Esch、de Boer F Richard、Hiemstra Henk、Ilona M Boska、Speckamp W. Nico

  DOI：10.1016/s0040-4020(01)86444-9

  日期：1991.1

  Formic acid-mediated cyclization reactions of N-(3-alkenyl)-N-(methoxycarbonyl)-acetoxyglycine esters are described. The major reaction products are 4-formyloxypipecolic acid derivatives, formed with low stereoselectivity at C-4. The several subtle features of the cyclization process are satisfactorily explained by a mechanism involving (1) a rapid cationic aza-Cope rearrangement of the incipient iminium ion and (2) participation of the ester moiety through formation of a relatively stable bicyclic dioxycarbenium cation as pivotal intermediate.