2-Methylene-1-iodoadamantane | 160833-60-3

• 分子结构分类: 有机化合物 - 有机卤素化合物
• 英文名称: 2-Methylene-1-iodoadamantane
• 英文别名: 1-iodo-2-methyleneadamantane；1-Iodo-2-methylideneadamantane
• CAS: 160833-60-3
• 化学式: C₁₁H₁₅I
• 分子量: 274.145
• InChiKey: SSKIMZLCPNZZMR-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.1
• 重原子数：
  12
• 可旋转键数：
  0
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.82
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为反应物：
  描述：

  2-Methylene-1-iodoadamantane 以86%的产率得到
  参考文献：
  名称：

  Ohga Yasushi, Munakata Motohiro, Kitagawa Toshikazu, Kinoshita Tomomi, Ta+, J. Org. Chem, 59 (1994) N 15, S 4056-4067

  摘要：

  DOI：
• 作为产物：
  描述：

  甲基三苯基溴化膦 、 1-Iodo-2-adamantanone 在 正丁基锂 作用下， 生成 2-Methylene-1-iodoadamantane
  参考文献：
  名称：

  Solvolyses of Bicyclo[2.2.2]oct-1-yl and 1-Adamantyl Systems Containing an Ethylidene Substituent on the 2-Position: Typical Examples of Rate Enhancements Ascribed to Relief of F-Strain

  摘要：

  The first typical examples are described on the solvolysis rate enhancements ascribed to the relief of F-strain between an alkyl group and the leaving group atom directly attached to the reaction center. The rates and products of solvolyses in ethanol were studied for 2-methylene- and (Z)- and (E)-2-ethylidenebicyclo[2.2.2]oct-1-yl triflates. Solvolyses were also conducted in ethanol and 2,2,2-trifluoroethanol (TFE) on 2-methylene- and (Z)- and (E)-2-ethylidene-1-adamantyl compounds having OMs, F, Cl, Br, or I asa leaving group. Ah the substrates gave the corresponding bridgehead substitution products as kinetic control products. The Z:E rate ratios at 25 degrees C were 217 +/- 6 for 2-ethylidenebicyclo[2.2.2]oct-1-yl triflates (ethanol) and 109 +/- Il(ethanol) and 117 fl(TFE)for 2-ethylidene-1-adamantyl mesylates. O-18 scrambling studies on the ethanolyses of(Z)- and (E)2-ethylidene-1-adamantyl mesylates showed that the titrimetrically determined Z:E rate ratios can be used as a measure of the rate ratios for the ionization step. The Z:E rate ratio in TFE at 25 degrees C for 2-ethylidene-1-adamantyl halides varied in the sequence F (ca. 70), Cl(1020 +/- 160), Br (2230 +/- 90), and I (9500 +/- 280). The significant increases in the rate ratio with the increase in the atomic size of halogen were explained in terms of the presence of F-strain in the Z substrates and its essential absence in the E substrates. Linear correlations were found in a plot of 1.36 x log[k(Z)/k(E)] against the MM2 steric energy difference between the Z and E isomers (slope 1.0) and against Hansch's Es, demonstrating the significance of F-strain effect in the enhanced rates of the (Z)-2-ethylidene-1-adamantyl system. These correlations showed an intercept of 0.8 kcal mol(-1), which suggested the greater stability of the (Z)-2-ethylidene-1-adamantyl cation than the corresponding E cation by this amount. Ab initio calculations (RHF/G-31G**) showed that the Z cation is more stable than the E cation by 1.0 kcal mol(-1), and that the large Z:E rate ratios are in part ascribed to the difference in the cation stability.

  DOI：

  10.1021/jo00094a012

文献信息

• Generation and Reactivity of 2-Substituted Adamantenes
  作者：Takao Okazaki、Kazuhiko Tokunaga、Toshikazu Kitagawa、Ken’ichi Takeuchi

  DOI：10.1246/bcsj.72.549

  日期：1999.3

  The title bridgehead olefins, generated by the dehalogenation of 1,2-dihalo-2-R-adamantanes (R = Me, Et, Ph, p-CF3C6H4) with excess t-BuLi, yielded 2-t-butyl-2-R-adamantanes (15), 1-t-butyl-2-R-adamantanes (16), and dimeric products. The ratios of the yields (%) of 16 to 15 were 20 : 3 (R = Me), 32 :< 1 (R = Et), 4 : 60 (R = Ph), and 5 : 57 (R = p-CF3C6H4). 2-Alkyladamantenes predominantly yielded

  标题桥头烯烃由 1,2-二卤-2-R-金刚烷（R = Me、Et、Ph、p-CF3C6H4）与过量的 t-BuLi 脱卤生成，得到 2-t-丁基-2-R -金刚烷 (15)、1-叔丁基-2-R-金刚烷 (16) 和二聚产物。16 比 15 的产率 (%) 比为 20:3 (R = Me)、32:< 1 (R = Et)、4: 60 (R = Ph) 和 5: 57 (R = p- CF3C6H4)。2-烷基金刚烷主要产生在 C(1) 处叔丁基化的产物，而 2-芳基金刚烷主要产生在 C(2) 处叔丁基化的产物。随着 C(2) 位置取代基的体积增大，二聚体的总产率下降。2-甲基金刚烷的二聚化得到头对头二聚体，1-(2-甲基-1-金刚烷基)-2-亚甲基金刚烷，以及头对尾二聚体，1-(2-甲基-2 -金刚烷基)-2-亚甲基金刚烷。两个2-苯基金刚烷分子之间的[4+2]环加成，其中苯基作为二烯的一部