N-[(E,2S)-5-hydroxy-1-phenylpent-3-en-2-yl]benzamide | 303766-36-1

• 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: N-[(E,2S)-5-hydroxy-1-phenylpent-3-en-2-yl]benzamide
• CAS: 303766-36-1
• 化学式: C₁₈H₁₉NO₂
• 分子量: 281.354
• InChiKey: GZFRWBYBPIACFN-SNQZOLJRSA-N

物化性质

• 沸点：
  519.3±50.0 °C(Predicted)
• 密度：
  1.134±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.8
• 重原子数：
  21
• 可旋转键数：
  6
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.17
• 拓扑面积：
  49.3
• 氢给体数：
  2
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  N-[(E,2S)-5-hydroxy-1-phenylpent-3-en-2-yl]benzamide 在 吡啶 、 四(三苯基膦)钯 、 potassium carbonate 作用下， 以 二氯甲烷 、 乙腈 为溶剂， 反应 36.0h， 生成 (4S-trans)-4,5-dihydro-4-benzyl-2-phenyl-5-vinyloxazoline
  参考文献：
  名称：

  Stereoselective Intramolecular Cyclization of Allyl and Homoallyl Benzamide via π-Allylpalladium Complex Catalyzed by Pd(0)

  摘要：

  The transformation of acyclic allylic benzamides 4 and homoallylic benzamides 12 to vinyl oxazolines 3 is achieved in the presence of base by the catalysis of Pd(0) in high yield and with high diastereoselectivity. Especially, in the case of homoallylic benzamides 12, trans-oxazolines 3 are formed exclusively or predominantly over cis-oxazolines 8, irrespective of the composition of their stereoisomers. The reaction is believed to proceed via the same pi-allylpalladium complex that arises from either primary or secondary allylic acetates. We applied this method to the syntheses of beta-amino-alpha-hydroxy acids 1 and gamma-amino-beta-hydroxy acids 2, conveniently protected as oxazoline.

  DOI：

  10.1021/jo991065r
• 作为产物：
  描述：

  N-Boc-L-苯丙氨醇 在 盐酸 、 三氟化硼乙醚 、 戴斯-马丁氧化剂 作用下， 以 二氯甲烷 、 水 、 乙酸乙酯 、 苯 为溶剂， 反应 7.25h， 生成 N-[(E,2S)-5-hydroxy-1-phenylpent-3-en-2-yl]benzamide
  参考文献：
  名称：

  Stereoselective Intramolecular Cyclization of Allyl and Homoallyl Benzamide via π-Allylpalladium Complex Catalyzed by Pd(0)

  摘要：

  The transformation of acyclic allylic benzamides 4 and homoallylic benzamides 12 to vinyl oxazolines 3 is achieved in the presence of base by the catalysis of Pd(0) in high yield and with high diastereoselectivity. Especially, in the case of homoallylic benzamides 12, trans-oxazolines 3 are formed exclusively or predominantly over cis-oxazolines 8, irrespective of the composition of their stereoisomers. The reaction is believed to proceed via the same pi-allylpalladium complex that arises from either primary or secondary allylic acetates. We applied this method to the syntheses of beta-amino-alpha-hydroxy acids 1 and gamma-amino-beta-hydroxy acids 2, conveniently protected as oxazoline.

  DOI：

  10.1021/jo991065r

文献信息

• Hydrogen Bond Directed Highly Regioselective Palladium-Catalyzed Allylic Substitution
  作者：Gregory R. Cook、Hui Yu、S. Sankaranarayanan、P. Sathya Shanker

  DOI：10.1021/ja028426w

  日期：2003.4.1

  The palladium-catalyzed allylic substitution of 5-vinyloxazolidinones and derivatives was investigated. Unusual and high regioselectivity for the branched product was observed. The regioselectivity was influenced by the type of substrate, the solvents, and the nucleophile. Imide-type nucleophiles were found to be directed to the internal carbon (branched:linear, 75:25 to >98:2), whereas sulfonamides

  研究了钯催化的 5-乙烯基恶唑烷酮和衍生物的烯丙基取代。观察到支化产物的异常和高区域选择性。区域选择性受底物类型、溶剂和亲核试剂的影响。发现酰亚胺型亲核试剂指向内部碳（支链：线性，75:25 至 >98:2），而磺酰胺、胺和丙二酸酯仅添加到烯丙基复合物的末端碳。相对非极性的溶剂如甲苯和四氢呋喃有利于支化产物（分别为 97:3 和 95:5）。乙腈和二氯甲烷提供较低的区域选择性（分别为 50:50 和 67:33），而质子溶剂乙醇的使用导致区域选择性的逆转（12:88）。基板上的导向组很重要。酰胺几乎完全形成支化产物，氨基甲酸酯得到区域异构体的 50:50 混合物，邻苯二甲酰亚胺作为亲核试剂。亲核试剂通过氢键定向的证据是通过用甲基取代酰胺的氢获得的，导致仅产生正常的线性产物。