2-(2-Iodo-1-methylethyl)-1,3-dioxolane | 146431-10-9

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二氧戊环
• 英文名称: 2-(2-Iodo-1-methylethyl)-1,3-dioxolane
• 英文别名: 2-(1-Iodopropan-2-yl)-1,3-dioxolane
• CAS: 146431-10-9
• 化学式: C₆H₁₁IO₂
• 分子量: 242.057
• InChiKey: IWBKSQBGWKLKGD-UHFFFAOYSA-N

物化性质

• 沸点：
  234.3±15.0 °C(Predicted)
• 密度：
  1.707±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.8
• 重原子数：
  9
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  18.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  2-(2-Iodo-1-methylethyl)-1,3-dioxolane 在 三乙烯二胺 、 盐酸 、 manganese(IV) oxide 、 间苯三酚 、 水 、 barium(II) hydroxide 、 sodium nitrite 作用下， 以 乙二醇二甲醚 、 二氯甲烷 、 二甲基亚砜 、 丙酮 为溶剂， 反应 101.0h， 生成 4-methyl-3-furaldehyde
  参考文献：
  名称：

  An Enantioselective Approach to Furanoeremophilanes: (+)-9-Oxoeuryopsin

  摘要：

  An enantioselective total synthesis of the furanoeremophilane sesquiterpene (+)-9-oxoeuryopsin 1 is reported. The synthesis involves as a key step a copper(II) triflate catalyzed tandem asymmetric conjugate addition of AlMe3 to 2-methyl-2-cyclohexen-1-one with the Feringa (S,R,R)-phosphoramidite binaphthol ligand, followed by aldol condensation of the resulting aluminum enolate with 4-methyl-3-furaldehyde 4. This tandem transformation has not been previously reported with a 2-substituted-2-cyclohexen-1-one. Conventional functional group manipulations completed the synthesis.

  DOI：

  10.1021/jo400399q
• 作为产物：
  描述：

  2-(β-Hydroxyisopropyl)-1,3-dioxolane 在 咪唑 、 碘 、 三苯基膦 作用下， 以 二氯甲烷 为溶剂， 以70%的产率得到2-(2-Iodo-1-methylethyl)-1,3-dioxolane
  参考文献：
  名称：

  An Enantioselective Approach to Furanoeremophilanes: (+)-9-Oxoeuryopsin

  摘要：

  An enantioselective total synthesis of the furanoeremophilane sesquiterpene (+)-9-oxoeuryopsin 1 is reported. The synthesis involves as a key step a copper(II) triflate catalyzed tandem asymmetric conjugate addition of AlMe3 to 2-methyl-2-cyclohexen-1-one with the Feringa (S,R,R)-phosphoramidite binaphthol ligand, followed by aldol condensation of the resulting aluminum enolate with 4-methyl-3-furaldehyde 4. This tandem transformation has not been previously reported with a 2-substituted-2-cyclohexen-1-one. Conventional functional group manipulations completed the synthesis.

  DOI：

  10.1021/jo400399q

文献信息

• Neighboring group participation in Lewis acid-promoted [3 + 4] and [3 + 5] annulations. The synthesis of oxabicyclo[3.n.1]alkan-3-ones
  作者：Gary A. Molander、Kimberly O. Cameron

  DOI：10.1021/ja00056a002

  日期：1993.2

  2-(alkoxycarbon)-m-oxabicyclo[3.n.1]alkan-3-ones can be constructed by this process in which two new carbon-carbon bonds are generated. Unusually high regioncontrol is observed, and good to excellent stereochemical control can be achieved at virtually every position on the new carbocycles. Intramolecular neighboring group participation is proposed to explain the unusually high selectivities attained in the annulation

  路易斯酸用作 1,4- 和 1,5- 二羰基亲电试剂与 β-二酮和 β-酮酯的双（三甲基甲硅烷基）烯醇醚环化的催化剂。多种 2-(烷氧基碳)-m-氧杂双环[3.n.1]alkan-3-ones 可以通过该过程构建，其中产生两个新的碳-碳键。观察到异常高的区域控制，并且几乎可以在新碳环的每个位置实现良好到出色的立体化学控制。提出分子内相邻基团参与来解释在环化反应中获得的异常高的选择性
• Cobalt(I)-Mediated Cycloisomerization of Enynes: Mechanistic Insights
  作者：Olivier Buisine、Corinne Aubert、Max Malacria

  DOI：10.1002/1521-3765(20010817)7:16<3517::aid-chem3517>3.0.co;2-v

  日期：2001.8.17

  [CpCo(CO)2] catalyzes the cycloisomerization of 1,n-enynes to afford selectively five- and six-membered ring systems in high yields. The factors governing the cyclization have been explored and we have discovered that the reaction associates two different, but complementary, reactivities of the cobalt(I) complexes. By a judicious choice of the substitution of the enyne, it was also possible to isolate

  [CpCo（CO）2]催化1，n-烯炔的环异构化，以高收率选择性提供五元和六元环系统。已经探索了控制环化的因素，我们发现该反应与钴（I）配合物的两个不同但互补的反应性相关。通过明智地选择烯炔的取代，也可能分离出由环戊烯钴产生的环丁烯
• Combined InCl₃- and Amine-Catalyzed Intramolecular Addition of α-Disubstituted Aldehydes onto Unactivated Alkynes
  作者：Benjamin Montaignac、Maxime R. Vitale、Veronique Michelet、Virginie Ratovelomanana-Vidal

  DOI：10.1021/ol100729t

  日期：2010.6.4

  The combination of enamine-type catalysis to the indium-catalyzed activation of alkynes allows the efficient preparation of functionalized cyclopentanes bearing a quaternary stereogenic center. A broad range of formylalkynyl derivatives has been prepared. The InCl3/(Cy)(i-Pr)NH system efficiently promotes the carbocyclization reaction of alpha-disubstituted aldehydes in good to excellent yields.
• Brønsted Acid-Promoted Intramolecular Carbocyclization of Alkynals Leading to Cyclic Enones
  作者：Carlos González-Rodríguez、Luz Escalante、Jesús A. Varela、Luis Castedo、Carlos Saá

  DOI：10.1021/ol900142r

  日期：2009.4.2

  TFA-promoted exo carbocyclizations of nonterminal 7-alkynals gave good to excellent yields of seven-membered cycloalkenones, a medium-sized functionalized ring present in natural products with relevant pharmacological properties. Nonterminal 5- and 6-alkynals also gave very good yields of the corresponding exo cyclopentenones and cyclohexenones. On the other hand, terminal 5-alkynals gave endo carbocyclizations to cyclohexenones. These carbocyclizations can be considered as tandem alkyne hydration/aldol condensation processes.
• InCl₃/CyNH₂ Cocatalyzed Carbocyclization Reaction: An Entry to α-Disubstituted <i>exo</i>-Methylene Cyclopentanes
  作者：Benjamin Montaignac、Maxime R. Vitale、Virginie Ratovelomanana-Vidal、Véronique Michelet

  DOI：10.1021/jo1018552

  日期：2010.12.3

  An efficient and cheap synthetic approach to functionalized exo-methylene cyclopentanes has been developed from alpha-disubstituted formyl-alkynes by merging amine catalysis with the indium activation of alkynes. We uncovered the crucial role of the amine cocatalyst and the development of a new cooperative catalytic system allowed the cyclization of a broad range of substrates. A mechanistic study was realized in order to rationalize the determining influence of the amine cocatalyst.