(+)-(S)-<2-(2-methylenecyclohexyl)ethyl>benzene

• 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: (+)-(S)-<2-(2-methylenecyclohexyl)ethyl>benzene
• 英文别名: (+)-(R)-(2-(2-methylenecyclohexyl)ethyl)benzene
• 化学式: C₁₅H₂₀
• 分子量: 200.324
• InChiKey: LNZOLFXXVAAUIP-OAHLLOKOSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.37
• 重原子数：
  15.0
• 可旋转键数：
  3.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.47
• 拓扑面积：
  0.0
• 氢给体数：
  0.0
• 氢受体数：
  0.0

反应信息

• 作为产物：
  描述：

  magnesium,ethylbenzene,bromide 、 1-(氯甲基)环己烯 在 N,N-Bis((R)-1-phenylethyl)dinaphtho[2,1-d:1',2'-f][1,3,2]dioxaphosphepin-4-amine 、 噻吩-2-甲酸亚铜(I) 作用下， 以 二氯甲烷 、 乙醚 为溶剂， 反应 5.0h， 以78%的产率得到(+)-(S)-<2-(2-methylenecyclohexyl)ethyl>benzene
  参考文献：
  名称：

  β-和γ-双取代烯烃：铜催化不对称烯丙基取代的底物

  摘要：

  铜催化的不对称烯丙基烷基化通过许多实例表明，它是用单β-和γ-取代的烯烃底物生成立体异构中心的有效手段。然而，关于更多取代的烯烃图案，例如β-二取代的烯丙基亲电试剂，几乎没有报道。在本文中，我们表明，使用容易获得的格氏试剂和低至3 mol％的铜/配体的简单程序可以促进高至近乎完美的对映选择性（高达> 99％ee），并且在很宽的范围内具有很好的γ选择性一组脂族或芳族β-二取代底物。

  DOI：

  10.1002/adsc.200800086

文献信息

• β-Disubstituted Allylic Chlorides: Substrates for the Cu-Catalyzed Asymmetric SN2′ Reaction
  作者：Caroline A. Falciola、Karine Tissot-Croset、Alexandre Alexakis

  DOI：10.1002/anie.200601855

  日期：2006.9.11
• Regio- and Enantioselective Substitution of Primary Endocyclic Allylic Sulfoximines with Organocopper and Organocuprate Reagents. The Importance of Iodide for the Allylic Substitution with Organocopper Compounds
  作者：Hans-Joachim Gais、Harald Mueller、Joerg Bund、Matthias Scommoda、Jochen Brandt、Gerhard Raabe

  DOI：10.1021/ja00114a009

  日期：1995.3

  The endocyclic N-substituted allylic sulfoximines 17-20 and 26 were synthesized from the corresponding cycloalkanones and the various (S)-S-(lithiomethyl)-S-phenylsulfoximine in enantiomerically pure form in yields of 60-70% in a process involving the isomerization of the intermediate vinylic sulfoximines. Desilylation of 26 gave the parent N-H sulfoximine 27 from which the N-sulfonylsulfoximines 28 and 29 were prepared. The X-ray crystal structure of 28 was determined. The allylic sulfoximines 17-20 and 26-29 did not racemize or rearrange thermally to the corresponding allylic sulfinamides. Reaction of the allylic sulfoximines 18, 28, and 29 with the organocuprate reagents 2/LiI, 35/LiI, and 47/LiI led with alpha-selectivities of 92:8 to 99:1 to the endocyclic alkenes 39 in good to high yields. Reaction of 17-20, 28, and 29 with the organocopper reagents 5/LiI, 30/LiI, 31/LiI, 32/LiI, 33/LiI, 34/LiI, and 37/LiI in the presence of BF3 resulted in the formation of the exocyclic alkenes 38, 41, 43, and 45, respectively, in good to high yields with gamma-selectivities of 80:20 to 99:1. The sulfonimidoyl group imparts asymmetric induction to the substitution in the range of 27-90% ee. The (S)-sulfonimidoyl group leads to a preferential bond formation from the si side of the double bond. From the sulfoximines 18 and 26-29 the N-methylsulfoximine 18 and the N-tosylsulfoximine 28 showed the highest and lowest reactivity with the butylcopper reagent 32/LiI in the presence of BF3 respectively, while in the absence of BF3 only 29 reacted. The Lewis acid most likely serves to activate the N-methyl- and N-tosylsulfoximines or intermediates thereof through coordination at the sulfonimidoyl and sulfonyl group. Reaction of the sulfoximines 18 and 29 with pure Me(3)SiCH(2)Cu (34) revealed a strong rate acceleration by LiI and an even stronger one by Bu(4)NI. This points to the existence of a heteroleptic cuprate or a related compound as reactive species. In substitutions with the Yamamoto reagents RCu/MX/BF3, the halide is important and a reaction between RCu and BF3 does not have, at least in the case of allylic sulfoximines, to be invoked. In reactions of 17-20 besides the alkenes, the sulfinamide ent-4 was formed with an ee value of 97% in high yield with retention of configuration. The absolute configuration of the exocyclic alkenes 38, 41, and 45 was determined by ozonolysis to the corresponding cycloalkanones followed by their conversion to the corresponding lactones and/or CD measurement of the former.
• β- and γ-Disubstituted Olefins: Substrates for Copper-Catalyzed Asymmetric Allylic Substitution
  作者：Caroline A. Falciola、Karine Tissot-Croset、Hugo Reyneri、Alexandre Alexakis

  DOI：10.1002/adsc.200800086

  日期：2008.5.5

  The copper-catalyzed asymmetric allylic alkylation has shown through many examples that it is a powerful means to generate stereogenic centers with mono β- and γ-substituted olefinic substrates. However, little has been reported about more substituted olefinic patterns, such as β-disubstituted allylic electrophiles. In this paper, we show that a simple procedure using easily accessible Grignard reagents

  铜催化的不对称烯丙基烷基化通过许多实例表明，它是用单β-和γ-取代的烯烃底物生成立体异构中心的有效手段。然而，关于更多取代的烯烃图案，例如β-二取代的烯丙基亲电试剂，几乎没有报道。在本文中，我们表明，使用容易获得的格氏试剂和低至3 mol％的铜/配体的简单程序可以促进高至近乎完美的对映选择性（高达> 99％ee），并且在很宽的范围内具有很好的γ选择性一组脂族或芳族β-二取代底物。