9,9-dicarbomethoxy-5-hydroxy-1-(trimethylsilyl)dodec-6(E)-en-1,11-diyne | 120545-21-3

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 英文名称: 9,9-dicarbomethoxy-5-hydroxy-1-(trimethylsilyl)dodec-6(E)-en-1,11-diyne
• 英文别名: dimethyl 2-[(E)-4-hydroxy-8-trimethylsilyloct-2-en-7-ynyl]-2-prop-2-ynylpropanedioate
• CAS: 120545-21-3
• 化学式: C₁₉H₂₈O₅Si
• 分子量: 364.514
• InChiKey: RCPZSTKRHFWEGK-ZRDIBKRKSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.31
• 重原子数：
  25.0
• 可旋转键数：
  8.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.58
• 拓扑面积：
  72.83
• 氢给体数：
  1.0
• 氢受体数：
  5.0

反应信息

• 作为反应物：
  描述：

  9,9-dicarbomethoxy-5-hydroxy-1-(trimethylsilyl)dodec-6(E)-en-1,11-diyne 在 tris-(dibenzylideneacetone)dipalladium(0) 、 溶剂黄146 、 三苯基膦 作用下， 以 苯 为溶剂， 以83%的产率得到3-[2-Hydroxy-6-trimethylsilanyl-hex-5-yn-(E)-ylidene]-4-methylene-cyclopentane-1,1-dicarboxylic acid dimethyl ester
  参考文献：
  名称：

  Hydroxy group as a regio- and stereochemical control element for sequential metal-catalyzed and thermal cyclizations

  摘要：

  DOI：

  10.1021/jo00271a006
• 作为产物：
  描述：

  炔丙基丙二酸二甲酯 在 Pd₂(dibenzylideneacetone)2*CHCl₃ 、 三苯基膦 、 pyridinium chlorochromate 作用下， 以 四氢呋喃 、 二氯甲烷 为溶剂， 反应 27.25h， 生成 9,9-dicarbomethoxy-5-hydroxy-1-(trimethylsilyl)dodec-6(E)-en-1,11-diyne
  参考文献：
  名称：

  Pd-Catalyzed Cycloisomerization to 1,2-Dialkylidenecycloalkanes. 2. Alternative Catalyst System

  摘要：

  The mechanisms by which palladium complexes may catalyze the cycloisomerization of 1,6- and 1,7-enynes to dialkylidenecycloalkanes were probed by exploring a catalyst system different than a ligated palladium acetate which previously has proven to be successful. Although carboxylic acids showed no discernible interaction with palladium(0) complexes, this combination proved to be a powerful catalyst system to effect this cycloisomerization. The fact that the two catalyst systems do not have the same reactivity profile suggests this new catalyst system may operate by a different mechanism. Evidence supporting a pathway invoking formation of a hydridopalladium acetate followed by hydropalladation as initiation is presented. Steric and electronic effects direct the regioselectivity of the termination step to form either 1,3- or 1,4-diene products. The 1,3-diene products participate exceedingly well in Diels-Alder reactions, both inter- and intramolecularly. The presence of an oxygen substituent at the position allylic to the diene served as both a regiochemical control element for the palladium-catalyzed cycloisomerization and a diastereochemical control element for the Diels-Alder reaction. The net result of these two steps, the first of which is a catalyzed isomerization and the second an addition, is a highly efficient approach to complex polycycles in terms of both selectivity and atom economy.

  DOI：

  10.1021/ja00089a016

文献信息

• TROST, BARRY M.;LEE, DONNA C., J. ORG. CHEM., 54,(1989) N0, C. 2271-2274
  作者：TROST, BARRY M.、LEE, DONNA C.

  DOI：——

  日期：——