pentamethyl (3Z)-4-[4-(dimethylamino)pyridin-1-ium-1-yl]buta-1,3-diene-1,1,2,3,4-pentacarboxylate;trifluoromethanesulfonate | 1015253-43-6

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 有机磺酸及其衍生物
• 英文名称: pentamethyl (3Z)-4-[4-(dimethylamino)pyridin-1-ium-1-yl]buta-1,3-diene-1,1,2,3,4-pentacarboxylate;trifluoromethanesulfonate
• CAS: 1015253-43-6
• 化学式: CF₃O₃S*C₂₁H₂₅N₂O₁₀
• 分子量: 614.507
• InChiKey: IUFMOMMLYXEGNQ-ULQCMBKMSA-M

计算性质

• 辛醇/水分配系数(LogP)：
  -0.54
• 重原子数：
  41
• 可旋转键数：
  13
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.36
• 拓扑面积：
  204
• 氢给体数：
  0
• 氢受体数：
  17

反应信息

• 作为产物：
  描述：

  Trifluoromethanesulfonate;trimethyl 2-[4-(dimethylamino)pyridin-1-ium-1-yl]ethene-1,1,2-tricarboxylate 、 丁炔二酸二甲酯 在 三苯基膦 作用下， 以 二氯甲烷 为溶剂， 反应 72.0h， 以79.4%的产率得到pentamethyl (3Z)-4-[4-(dimethylamino)pyridin-1-ium-1-yl]buta-1,3-diene-1,1,2,3,4-pentacarboxylate;trifluoromethanesulfonate
  参考文献：
  名称：

  Nucleophilic β-Oniovinylation:  Concept, Mechanism, Scope, and Applications

  摘要：

  Insertion of an electron-deficient alkyne A-C C-A (A = CO(2)Me) into the C-L(+) bond of an acyl-onio salt R-C(O)-L(+) (R = Ar, OAlk; L = 4-dimethylaminopyridine, PPh(3)) has for the first time been achieved in the presence of catalytic amounts of the nucleophile L. For R = OMe, a second insertion of the alkyne was observed. X-ray structures were obtained for a number of such -oniovinylation products. Depending on reaction conditions, preferentially E- or Z-stereochemistry was observed, the Z-isomer being the thermodynamically more stable. A mechanism for this novel insertion reaction is presented which accounts for the topology of the products and rationalizes the observed stereochemistry. The beta-onio-activated Michael systems thus generated represent a virtually unexplored class of compounds. The onio substituent in such compounds can be selectively replaced by a number of nucleophiles. Thus a series of Michael systems with donor functions in the beta-position is easily synthesized. These compounds represent a source for useful further transformations, for example, cyclizations to quinolones, thiochromones, and pyrazoles.

  DOI：

  10.1021/ja071316a