(E)-N-(1-cyclopropyl-2-ethylidenepentyl)benzenesulfonamide

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: (E)-N-(1-cyclopropyl-2-ethylidenepentyl)benzenesulfonamide
• 英文别名: N-[(2E)-1-cyclopropyl-2-ethylidenepentyl]benzenesulfonamide
• 化学式: C₁₆H₂₃NO₂S
• 分子量: 293.43
• InChiKey: BMMHGAUYFSNBTJ-YIXHJXPBSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.1
• 重原子数：
  20
• 可旋转键数：
  7
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  54.6
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  (E)-N-cyclopropylmethylenebenzenesulfonamide 、 2-已炔 在 Ir(cod)2BARF 、 三苯基乙酸 氢气 、 sodium sulfate 作用下， 以 甲苯 为溶剂， 80.0 ℃ 、101.33 kPa 条件下， 反应 4.0h， 生成 (E)-N-(1-cyclopropyl-2-ethylidenepentyl)benzenesulfonamide 、 (Z)-N-(1-cyclopropyl-2-ethylidenepentyl)benzenesulfonamide 、
  参考文献：
  名称：

  Allylic Amines via Iridium-Catalyzed C−C Bond Forming Hydrogenation:  Imine Vinylation in the Absence of Stoichiometric Byproducts or Metallic Reagents

  摘要：

  Exposure of aromatic, heteroaromatic, and aliphatic N-arylsulfonyl aldimines 1a-12a in toluene solution at 60 degrees C to 2-butyne and hydrogen at ambient pressure in the presence of a cationic iridium(I) catalyst modified by BIPHEP enables formation of reductive coupling products, allylic amines 1b-12b, in good isolated yields as single geometrical isomers (> 95:5, E:Z). The nonsymmetric alkynes 4-methyl-2-pentyne couple to imines 1b-12b under standard conditions with complete levels of regioselection. Hydrogenative coupling of 2-hexyne to imines 6a, 12a, and 13a delivers allylic amines 15b, 16b, and 18b in 10:1 regioisomeric ratios in each case. As revealed by H-2 NMR analysis, reductive coupling of 2-butyne to imine 2a under an atmosphere of elemental deuterium provides deuterio-2b, which incorporates deuterium at the vinylic position (83% H-2) and at the allylic methyl groups (5% H-2). An equal distribution of deuterium at the allylic methyl groups suggests H-D exchange at the propargylic positions of 2-butyne in advance of C-C coupling.

  DOI：

  10.1021/ja073018j