2-[(2E,4Z)-5-butyltellanyl-3-methylpenta-2,4-dienoxy]oxane | 153559-19-4

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 氧烷类
• 英文名称: 2-[(2E,4Z)-5-butyltellanyl-3-methylpenta-2,4-dienoxy]oxane
• CAS: 153559-19-4
• 化学式: C₁₅H₂₆O₂Te
• 分子量: 365.97
• InChiKey: QMDCLBGIBHQFQK-SUUJTOJZSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.91
• 重原子数：
  18
• 可旋转键数：
  8
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.73
• 拓扑面积：
  18.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  丁基环氧乙烷 、 2-[(2E,4Z)-5-butyltellanyl-3-methylpenta-2,4-dienoxy]oxane 在 (2-Th)Cu(Bu)(CN)Li₂ 、 三氟化硼乙醚 作用下， 生成 二正丁基碲 、 (7Z,9E)-9-methyl-11-(oxan-2-yloxy)undeca-7,9-dien-5-ol
  参考文献：
  名称：

  Tellurium in Organic Synthesis. Preparation of Z-Vinylic Cuprates from Z-Vinylic Tellurides and Their Reaction with Enones and Epoxides

  摘要：

  Z-Vinylic tellurides, obtained with 100% stereoselectivity by the hydrotelluration of acetylenes, are easily transformed into Z-vinylic higher order cyanocuprates by reaction with preformed Me(2)Cu(CN)Li-2, n-Bu(2)Cu(CN)Li-2, or n-Bu(2-Th)Cu(CN)Li-2, with total retention of the double-bond configuration. The resulting vinylic higher order cyanocuprates react with unhindered enones to give the corresponding 1,4-addition products in good yields. Reaction of the vinylic higher order cyanocuprates with monosubstituted epoxides at 0 degrees C gives the homoallylic alcohols resulting from the attack to the less-substituted carbon atom, while the disubstituted epoxides failed to react. Allylic epoxides react at -78 degrees C with the vinylic higher order cyanocuprates to give mixtures of 1,2- and 1,4-opening products, the 1,4-product predominating. In all cases the double-bond configuration of the original vinylic telluride was preserved. The vinylic cuprates derived from simple vinylic tellurides and conjugated 1-telluroenynes react with epoxides at 0 degrees C, while vinylic cuprates derived from conjugated 1-tellurodienes required the addition of 1 equiv of BF3 . Et(2)O to give the homoallylic alcohols on reaction with epoxides. The opening of optically pure epoxides through tellurium/copper transmetalation is stereospecific, giving one single stereoisomer of the corresponding homoallylic alcohol.

  DOI：

  10.1021/jo951547c
• 作为产物：
  描述：

  (E)-2-((3-methylpent-2-en-4-yn-1-yl)oxy)tetrahydro-2H-pyran 、 二丁基二碲 在 sodium tetrahydroborate 作用下， 以 乙醇 为溶剂， 反应 4.0h， 以83%的产率得到2-[(2E,4Z)-5-butyltellanyl-3-methylpenta-2,4-dienoxy]oxane
  参考文献：
  名称：

  Tellurium in Organic Synthesis. Preparation of Z-Vinylic Cuprates from Z-Vinylic Tellurides and Their Reaction with Enones and Epoxides

  摘要：

  Z-Vinylic tellurides, obtained with 100% stereoselectivity by the hydrotelluration of acetylenes, are easily transformed into Z-vinylic higher order cyanocuprates by reaction with preformed Me(2)Cu(CN)Li-2, n-Bu(2)Cu(CN)Li-2, or n-Bu(2-Th)Cu(CN)Li-2, with total retention of the double-bond configuration. The resulting vinylic higher order cyanocuprates react with unhindered enones to give the corresponding 1,4-addition products in good yields. Reaction of the vinylic higher order cyanocuprates with monosubstituted epoxides at 0 degrees C gives the homoallylic alcohols resulting from the attack to the less-substituted carbon atom, while the disubstituted epoxides failed to react. Allylic epoxides react at -78 degrees C with the vinylic higher order cyanocuprates to give mixtures of 1,2- and 1,4-opening products, the 1,4-product predominating. In all cases the double-bond configuration of the original vinylic telluride was preserved. The vinylic cuprates derived from simple vinylic tellurides and conjugated 1-telluroenynes react with epoxides at 0 degrees C, while vinylic cuprates derived from conjugated 1-tellurodienes required the addition of 1 equiv of BF3 . Et(2)O to give the homoallylic alcohols on reaction with epoxides. The opening of optically pure epoxides through tellurium/copper transmetalation is stereospecific, giving one single stereoisomer of the corresponding homoallylic alcohol.

  DOI：

  10.1021/jo951547c

文献信息

• Tellurium in Organic Synthesis. Preparation of <i>Z</i>-Vinylic Cuprates from <i>Z</i>-Vinylic Tellurides and Their Reaction with Enones and Epoxides
  作者：Fábio C. Tucci、André Chieffi、João V. Comasseto、Joseph P. Marino

  DOI：10.1021/jo951547c

  日期：1996.1.1

  Z-Vinylic tellurides, obtained with 100% stereoselectivity by the hydrotelluration of acetylenes, are easily transformed into Z-vinylic higher order cyanocuprates by reaction with preformed Me(2)Cu(CN)Li-2, n-Bu(2)Cu(CN)Li-2, or n-Bu(2-Th)Cu(CN)Li-2, with total retention of the double-bond configuration. The resulting vinylic higher order cyanocuprates react with unhindered enones to give the corresponding 1,4-addition products in good yields. Reaction of the vinylic higher order cyanocuprates with monosubstituted epoxides at 0 degrees C gives the homoallylic alcohols resulting from the attack to the less-substituted carbon atom, while the disubstituted epoxides failed to react. Allylic epoxides react at -78 degrees C with the vinylic higher order cyanocuprates to give mixtures of 1,2- and 1,4-opening products, the 1,4-product predominating. In all cases the double-bond configuration of the original vinylic telluride was preserved. The vinylic cuprates derived from simple vinylic tellurides and conjugated 1-telluroenynes react with epoxides at 0 degrees C, while vinylic cuprates derived from conjugated 1-tellurodienes required the addition of 1 equiv of BF3 . Et(2)O to give the homoallylic alcohols on reaction with epoxides. The opening of optically pure epoxides through tellurium/copper transmetalation is stereospecific, giving one single stereoisomer of the corresponding homoallylic alcohol.