methyl 2-(methoxycarbonyl)-2-propargyl-6-hydroxy-4-hexenoate | 120545-11-1

• 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: methyl 2-(methoxycarbonyl)-2-propargyl-6-hydroxy-4-hexenoate
• 英文别名: dimethyl 2-(4-hydroxybut-2-enyl)-2-(prop-2-ynyl)malonate；Dimethyl 2-(4-hydroxybut-2-enyl)-2-prop-2-ynylpropanedioate；dimethyl 2-(4-hydroxybut-2-enyl)-2-prop-2-ynylpropanedioate
• CAS: 120545-11-1
• 化学式: C₁₂H₁₆O₅
• 分子量: 240.256
• InChiKey: UQDCBYDPDMAGCY-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.7
• 重原子数：
  17
• 可旋转键数：
  8
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  72.8
• 氢给体数：
  1
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  methyl 2-(methoxycarbonyl)-2-propargyl-6-hydroxy-4-hexenoate 在 pyridinium chlorochromate 作用下， 以 二氯甲烷 为溶剂， 反应 2.0h， 生成 2-((E)-4-Oxo-but-2-enyl)-2-prop-2-ynyl-malonic acid dimethyl ester
  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
• 作为产物：
  描述：

  5,5,8-tri(methoxycarbonyl)oct-2-en-7-ynyl methanesulfonate 在 indium 作用下， 以 四氢呋喃 、 水 为溶剂， 以8%的产率得到methyl 2-(methoxycarbonyl)-2-propargyl-6-hydroxy-4-hexenoate
  参考文献：
  名称：

  水性溶剂体系中新型铟介导的链状卤代环烯的环化反应

  摘要：

  由金属铟介导的链状烯丙基溴在末端炔烃上的分子内环化反应在THF和H 2 O的混合物中平稳且清洁地进行，从而以高收率得到不饱和碳环和杂环。或者，环化反应可在无水THF中借助酸催化进行。该反应还由一系列铟盐介导，并在共还原剂存在下以亚化学计量的铟进行。氘化的研究表明，通过协同反应的进行顺碳-碳三键的carboindination得到中间体，其在原位质子化。

  DOI：

  10.1016/j.tet.2006.01.094

文献信息

• Interception of a Rautenstrauch Intermediate by Alkynes for [5+2] Cycloaddition: Rhodium-Catalyzed Cycloisomerization of 3-Acyloxy-4-ene-1,9-diynes to Bicyclo[5.3.0]decatrienes
  作者：Xing-zhong Shu、Suyu Huang、Dongxu Shu、Ilia A. Guzei、Weiping Tang

  DOI：10.1002/anie.201103136

  日期：2011.8.22

  rhodium(I)‐catalyzed cycloisomerization for the synthesis of bicyclic compounds containing a cycloheptatriene ring from linear alkenynes (see scheme; cod=1,5‐cyclooctadiene) is proposed to proceed through 1,2‐acyloxy migration, 6 π electrocyclization, migratory insertion, and reductive elimination. The overall process can be viewed as a novel intramolecular [5+2] cycloaddition with concomitant 1,2‐acyloxy

  自行车中的Rholling：铑（I）催化的环异构化用于从直链烯炔合成含有环庚三烯环的双环化合物（参见方案；cod=1,5-环辛二烯），建议通过1,2-酰氧基迁移进行， 6 π 电环化、迁移插入和还原消除。整个过程可以被视为一种新颖的分子内[5+2]环加成反应，并伴有 1,2-酰氧基迁移。