1-iodo-3-(p-tolyl)bicyclo<1.1.1>pentane | 159600-56-3

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 1-iodo-3-(p-tolyl)bicyclo<1.1.1>pentane
• 英文别名: 1-iodo-3-(p-tolyl)bicyclo[1.1.1]pentane；1-(4-Methylphenyl)-3-iodobicyclo[1.1.1]pentane；1-iodo-3-(4-methylphenyl)bicyclo[1.1.1]pentane
• CAS: 159600-56-3
• 化学式: C₁₂H₁₃I
• 分子量: 284.14
• InChiKey: DTQSPFVRRZKOOL-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.4
• 重原子数：
  13
• 可旋转键数：
  1
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为产物：
  描述：

  在 4-二甲氨基吡啶 、 2-碘-1,1,1-三氟乙烷 、 2-mercaptopyridine-1-oxide sodium salt 作用下， 反应 1.0h， 以95%的产率得到1-iodo-3-(p-tolyl)bicyclo<1.1.1>pentane
  参考文献：
  名称：

  Formation and Reactions of Bicyclo[1.1.1]pentyl-1 Cations

  摘要：

  The ionization of l-bicyclo[1.1.1]pentyl halides was shown to initially form the 1,3-bridged bicycle[1.1.1]pentyl-l cation. It appears to be a transition state that leads to the bicyclo[1.1.0]butyl-1-carbinyl cation which can be trapped with azide ion and can be directly observed by NMR in SO2CIF. Although the major products of solvolysis of the halides are 3-methylenecyclobutyl derivatives, the corresponding cation was calculated to have a significantly higher energy than the bicyclobutylcarbinyl ion. Therefore, the products are probably formed by an attack of the nucleophile on the latter ion, accompanied by bond migration. The bridgehead iodide reacts under solvolytic conditions with azide ion to form bicyclo[1.1.0]butyl-l azide as a product. It also reacts with potassium hydroxide to give [1.1.1]propellane, and the same reaction occurs on dissolving in acetonitrile or pyridine. The reaction of 1,3-diiodobicyclo[1.1.1]pentane with ethoxide ion also was found to give [1.1.1]propellane via a nucleophilic attack on one of the iodines. The propellane reacts with methyl hypoiodite to give 3-iodobicyclo[1.1.1]pentyl-l cation, which can react with methanol to give 3-methoxybicyclo[1.1.1]pentyl-l iodide and with azide ion to give 3-iodobicyclo[1.1.1]pentyl-1 azide. These data provide evidence for a discrete 3-iodobicyclo[1.1.1]pentyl-l cation intermediate. The effect of substituents on the rate of solvolysis of bicyclo[1.1.1]pentyl-l iodide was studied. With 3-aryl substituents, a value of rho = -1.7 was found, which is similar to that observed in the solvolysis of 3-arylcyclobutyl tosylates (rho = -1.6). The 3-substituted bicyclopentyl halides usually form the corresponding 3-methylenecyclobutyl cations rather than bicyclo[1.1.0]butyl-1-carbinyl ions, because most substituents will help stabilize the former type of ion.

  DOI：

  10.1021/ja00105a046

文献信息

• Nickel- and Palladium-Catalyzed Cross-Coupling Reactions at the Bridgehead of Bicyclo[1.1.1]pentane Derivatives - A Convenient Access to Liquid Crystalline Compounds Containing Bicyclo[1.1.1]pentane Moieties
  作者：Matthias Messner、Sergei I. Kozhushkov、Armin de Meijere

  DOI：10.1002/1099-0690(200004)2000:7<1137::aid-ejoc1137>3.0.co;2-2

  日期：2000.4

  Pd(PPh3)4, or PdCl2(dppf) catalysis to give a number of 1,3-disubstituted bicyclo[1.1.1]pentyl derivatives 17, 20, and 23, several of which exhibit liquid crystalline properties, in moderate to very good yields. The coupling products 20ca, 23ab, 23ae, 23ff, and 23fg have been further transformed to yield bicyclo[1.1.1]pentyl derivatives 32, 24ab, 24ae, 27ff, and 27fg, respectively, bearing alkynyl, cyano

  有机碘化物 7a-s 在 [1.1.1] 推进烷 (2) 上的自由基加成反应，然后是卤素-锂交换和与氯化锌的金属转移，以及将格利雅试剂添加到 2，提供了各种 3-取代双环[1.1.1]pentyl-1-magnesium (14) 和-zinc (19) 衍生物。后者在 NiCl2dppe、Pd(PPh3)4 或 PdCl2(dppf) 催化下与各种烯基、芳基和联芳基卤化物和三氟甲磺酸酯偶联，得到许多 1,3-二取代的双环 [1.1.1] 戊基衍生物 17 、20和23，其中一些表现出液晶性质，产率中等至非常好。偶联产物 20ca、23ab、23ae、23ff 和 23fg 已进一步转化为双环 [1.1.1] 戊基衍生物 32、24ab、24ae、27ff 和 27fg，分别带有炔基、氰基和/或烯基.