ethyl 3-chloro-2-(4-methylphenylsulfonamido)-4-(3-nitrophenyl)-4-oxobutanoate | 1283749-00-7

• 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: ethyl 3-chloro-2-(4-methylphenylsulfonamido)-4-(3-nitrophenyl)-4-oxobutanoate
• CAS: 1283749-00-7
• 化学式: C₁₉H₁₉ClN₂O₇S
• 分子量: 454.888
• InChiKey: LTAWACJOPRJRNZ-SJORKVTESA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.6
• 重原子数：
  30.0
• 可旋转键数：
  9.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.26
• 拓扑面积：
  132.68
• 氢给体数：
  1.0
• 氢受体数：
  7.0

反应信息

• 作为产物：
  描述：

  二氯胺T 、 ethyl 4-(3-nitrophenyl)-4-oxobut-2-enoate 、 对甲苯磺酰胺 在 C₃₅H₅₆N₄O₄ 、 scandium tris(trifluoromethanesulfonate) 作用下， 生成 ethyl 3-chloro-2-(4-methylphenylsulfonamido)-4-(3-nitrophenyl)-4-oxobutanoate
  参考文献：
  名称：

  Catalytic Asymmetric Chloroamination Reaction of α,β-Unsaturated γ-Keto Esters and Chalcones

  摘要：

  Highly efficient catalytic chloroamination reaction of alpha,beta-unsaturated gamma-keto esters and chalcones has been developed via a chloronium-based mechanism to deliver anti-regioselective vicinal chloroamines instead of the aziridinium intermediates delivered aminochlorides. The combination of TsNCl2 and TsNH2 as reagents made the transformation highly efficient, delivering the gamma-carbonyl-beta-chloro-alpha-amino acid derivatives and alpha-chloro-beta-amino-ketone derivatives in nearly quantitative yields with up to 99% ee and 99:1 dr under 0.05-0.5 mol % catalyst loading. TsNHCl was demonstrated to act as the key reactive species to form a bridged chloronium ion intermediate in the presence of a chiral scandium complex. The method might provide useful information for further realization of other haloamination reactions.

  DOI：

  10.1021/ja110668c