ethyl (2E,4E,6Z)-7-(8,8-dimethyl-3,4,5,6,7,8-hexahydronaphthalen-2-yl)-3-methylocta-2,4,6-trienoate | 302903-03-3

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 异戊烯醇脂质
• 英文名称: ethyl (2E,4E,6Z)-7-(8,8-dimethyl-3,4,5,6,7,8-hexahydronaphthalen-2-yl)-3-methylocta-2,4,6-trienoate
• 英文别名: ethyl (2E,4E,6Z)-7-(8,8-dimethyl-4,5,6,7-tetrahydro-3H-naphthalen-2-yl)-3-methylocta-2,4,6-trienoate
• CAS: 302903-03-3
• 化学式: C₂₃H₃₂O₂
• 分子量: 340.506
• InChiKey: QJCWTGZZFJCDDP-DDZVKYMWSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.3
• 重原子数：
  25
• 可旋转键数：
  6
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.52
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  ethyl (2E,4E,6Z)-7-(8,8-dimethyl-3,4,5,6,7,8-hexahydronaphthalen-2-yl)-3-methylocta-2,4,6-trienoate 在 氢氧化钾 作用下， 以 乙醇 、 水 为溶剂， 反应 0.5h， 以95%的产率得到(2E,4E,6Z)-7-(8,8-dimethyl-3,4,5,6,7,8-hexahydronaphthalen-2-yl)-3-methylocta-2,4,6-trienoic acid
  参考文献：
  名称：

  Stereocontrolled Synthesis of 6-s-cis- and 6-s-trans-Locked 9Z-Retinoids by Hydroxyl-Accelerated Stille Coupling of (Z)-Tri-n-Butylstannylbut-2-en-1-ol and Bicyclic Dienyl Triflates

  摘要：

  Analogues of 9-cis-retinoic acid with locked 6-s-cis and 6-s-trans conformations have been stereoselectively synthesized using a Stille coupling reaction between bicyclic dienyl triflates (5 and 6, respectively) and (Z)-tributylstannylbut-2-en-1-ol (7) to stablish the Z geometry of the polyenic side chain. The mild conditions (25 degrees C, 30 min) of this coupling stand in contrast to the reluctance of the isomeric (E)-tributylstannylbut-2-en-1-ol (18) to react with triflates 5/6. The significant rate differences experimentally observed in Stille reactions between isomeric (Z)- and (E)-tri-n-butylstannylalkenols in favor of the former isomer, even with highly hindered alkenyl triflates, is ascribed to internal coordination of palladium to the heteroatom in the presumably rate-limiting transmetalation step. Dienals and trienals with an E geometry, which are not efficiently available by direct coupling of the corresponding triflates and E-stannanes, can in turn be obtained by isomerization of their Z-isomers.

  DOI：

  10.1021/jo9917588
• 作为产物：
  描述：

  3-甲基-4-膦酰丁烯酸三乙酯 、 3-(3,4,5,6,7,8-hexahydro-8,8-dimethyl-2-naphthalenyl)-3-methyl-2-propenal 在 N,N-二甲基丙烯基脲 、 正丁基锂 作用下， 以 四氢呋喃 、 正己烷 为溶剂， 反应 0.83h， 以77%的产率得到ethyl (2E,4E,6Z)-7-(8,8-dimethyl-3,4,5,6,7,8-hexahydronaphthalen-2-yl)-3-methylocta-2,4,6-trienoate
  参考文献：
  名称：

  Stereocontrolled Synthesis of 6-s-cis- and 6-s-trans-Locked 9Z-Retinoids by Hydroxyl-Accelerated Stille Coupling of (Z)-Tri-n-Butylstannylbut-2-en-1-ol and Bicyclic Dienyl Triflates

  摘要：

  Analogues of 9-cis-retinoic acid with locked 6-s-cis and 6-s-trans conformations have been stereoselectively synthesized using a Stille coupling reaction between bicyclic dienyl triflates (5 and 6, respectively) and (Z)-tributylstannylbut-2-en-1-ol (7) to stablish the Z geometry of the polyenic side chain. The mild conditions (25 degrees C, 30 min) of this coupling stand in contrast to the reluctance of the isomeric (E)-tributylstannylbut-2-en-1-ol (18) to react with triflates 5/6. The significant rate differences experimentally observed in Stille reactions between isomeric (Z)- and (E)-tri-n-butylstannylalkenols in favor of the former isomer, even with highly hindered alkenyl triflates, is ascribed to internal coordination of palladium to the heteroatom in the presumably rate-limiting transmetalation step. Dienals and trienals with an E geometry, which are not efficiently available by direct coupling of the corresponding triflates and E-stannanes, can in turn be obtained by isomerization of their Z-isomers.

  DOI：

  10.1021/jo9917588

文献信息

• Stereocontrolled Synthesis of 6-<i>s</i>-<i>cis</i>- and 6-<i>s</i>-<i>trans</i>-Locked 9<i>Z</i>-Retinoids by Hydroxyl-Accelerated Stille Coupling of (<i>Z</i>)-Tri-<i>n</i>-Butylstannylbut-2-en-1-ol and Bicyclic Dienyl Triflates
  作者：Beatriz Domínguez、Yolanda Pazos、Angel R. de Lera

  DOI：10.1021/jo9917588

  日期：2000.9.1

  Analogues of 9-cis-retinoic acid with locked 6-s-cis and 6-s-trans conformations have been stereoselectively synthesized using a Stille coupling reaction between bicyclic dienyl triflates (5 and 6, respectively) and (Z)-tributylstannylbut-2-en-1-ol (7) to stablish the Z geometry of the polyenic side chain. The mild conditions (25 degrees C, 30 min) of this coupling stand in contrast to the reluctance of the isomeric (E)-tributylstannylbut-2-en-1-ol (18) to react with triflates 5/6. The significant rate differences experimentally observed in Stille reactions between isomeric (Z)- and (E)-tri-n-butylstannylalkenols in favor of the former isomer, even with highly hindered alkenyl triflates, is ascribed to internal coordination of palladium to the heteroatom in the presumably rate-limiting transmetalation step. Dienals and trienals with an E geometry, which are not efficiently available by direct coupling of the corresponding triflates and E-stannanes, can in turn be obtained by isomerization of their Z-isomers.