2-ethyl-3-methyl-2,3-dihydroindole | 50837-62-2

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吲哚及其衍生物
• 英文名称: 2-ethyl-3-methyl-2,3-dihydroindole
• 英文别名: cis-2-ethyl-3-methylindoline；(2S,3S)-2-ethyl-3-methyl-2,3-dihydro-1H-indole
• CAS: 50837-62-2；142612-84-8
• 化学式: C₁₁H₁₅N
• 分子量: 161.247
• InChiKey: QXMTXARTSNIIBT-WPRPVWTQSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.2
• 重原子数：
  12
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.45
• 拓扑面积：
  12
• 氢给体数：
  1
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  2-ethyl-3-methyl-2,3-dihydroindole 在 dirhodium tetraacetate 1,8-二氮杂双环[5.4.0]十一碳-7-烯 、 三乙胺 、 甲烷磺酰基叠氮化物 作用下， 以 二氯甲烷 为溶剂， 生成 1-acetyl-4-ethyl-2-hydroxy-5-methyl-4,5-dihydropyrrolo<3,2,1-hi>indole
  参考文献：
  名称：

  Dirhodium tetraacetate catalyzed carbon-hydrogen insertion reaction in N-substituted .alpha.-carbomethoxy-.alpha.-diazoacetanilides and structural analogs. Substituent and conformational effects

  摘要：

  A series of acyclic alpha-carbomethoxy-alpha-diazoacetanilides with different N-substituents, 5a-k, was prepared and the rhodium(II) acetate catalyzed reactions studied. It was found that the rhodium carbenoid reaction with these compounds occurred only at the N-substituent; when the N-substituent is a propargyl group, rhodium carbenoid addition to the triple bond is favored, resulting, ultimately, in the formation of a bicyclic furan derivative 8. With an N-(tert-butyloxycarbonyl)methyl substituent, interception of the rhodium carbenoid by the ester carbonyl oxygen occurred preferentially to give, eventually, 1,4-oxazine derivatives 9 and 9'. For N-alkyl substituents, rhodium carbenoid carbon-hydrogen (C-H) insertion into the alkyl group to give 2-azetidinone and/or 2-pyrrolidinone derivatives was observed. The chemoselectivity of the rhodium carbenoid C-H insertion can be altered by the use of the alpha-acetyl and alpha-phenylsulfonyl substituents. In these cases, exclusive C-H insertion at the N-aryl moiety resulted to give 2(3H)-indolinone products. However, the alpha-substituent effect on the chemoselectivity of the insertion reaction is easily overridden by conformational effects about the amide N-C(O) bond as revealed by the insertion reactions of the conformationally rigid compounds 20a-c. The alpha-substituent effects are reestablished when conformational rigidity is removed, as exemplified by the rhodium carbenoid insertion reactions of compounds 29a,b.

  DOI：

  10.1021/jo00042a018
• 作为产物：
  描述：

  2-乙基-3-甲基-1H-吲哚 在 高氯酸 、 palladium 10% on activated carbon 、 氢气 作用下， 以 溶剂黄146 为溶剂， 反应 24.0h， 以46%的产率得到2-ethyl-3-methyl-2,3-dihydroindole
  参考文献：
  名称：

  化学酶法立体选择性合成2,3-二取代的吲哚啉非对映异构体

  摘要：

  通过Fischer吲哚化已有效制备了外消旋二氢吲哚，包括各种结构基序，例如C-2和C-3取代（烷基或芳基），顺/反相对立体化学和芳香环（氟，甲基或甲氧基）的官能化以及随后的非保护吲哚的非对映选择性还原。的组合南极假丝酵母脂肪酶A型和烯丙基3-甲氧基苯基碳酸酯已经被鉴定为对他们的动力学拆分最好串联，观察对于大多数所测试的二氢吲哚的优良stereodiscriminations。

  DOI：

  10.1021/jo301307q

文献信息

• Direct Asymmetric Hydrosilylation of Indoles: Combined Lewis Base and Brønsted Acid Activation
  作者：You-Cai Xiao、Chao Wang、Yuan Yao、Jian Sun、Ying-Chun Chen

  DOI：10.1002/anie.201105341

  日期：2011.11.4

  Quite a pair: The first organocatalytic direct asymmetric reduction of unprotected 1H‐indoles to chiral indolines has been developed. The reaction proceeds through the generation of electrophilic indolenium ions by a Brønsted acid, and then chiral Lewis base (1) mediated enantioselective hydride transfer with HSiCl3. A variety of chiral indolines were obtained with moderate to excellent enantioselectivity

  相当一对：已开发出第一个有机催化将未保护的1 H吲哚直接不对称还原为手性二氢吲哚。反应通过布朗斯台德酸生成亲电吲哚离子进行，然后手性Lewis碱（1）与HSiCl 3介导对映选择性氢化物转移。获得各种具有中等至优异对映选择性的手性二氢吲哚。MOM ＝甲氧基甲基。
• Dirhodium tetraacetate catalyzed carbon-hydrogen insertion reaction in N-substituted .alpha.-carbomethoxy-.alpha.-diazoacetanilides and structural analogs. Substituent and conformational effects
  作者：Andrew G. H. Wee、Baosheng Liu、Lin Zhang

  DOI：10.1021/jo00042a018

  日期：1992.7

  A series of acyclic alpha-carbomethoxy-alpha-diazoacetanilides with different N-substituents, 5a-k, was prepared and the rhodium(II) acetate catalyzed reactions studied. It was found that the rhodium carbenoid reaction with these compounds occurred only at the N-substituent; when the N-substituent is a propargyl group, rhodium carbenoid addition to the triple bond is favored, resulting, ultimately, in the formation of a bicyclic furan derivative 8. With an N-(tert-butyloxycarbonyl)methyl substituent, interception of the rhodium carbenoid by the ester carbonyl oxygen occurred preferentially to give, eventually, 1,4-oxazine derivatives 9 and 9'. For N-alkyl substituents, rhodium carbenoid carbon-hydrogen (C-H) insertion into the alkyl group to give 2-azetidinone and/or 2-pyrrolidinone derivatives was observed. The chemoselectivity of the rhodium carbenoid C-H insertion can be altered by the use of the alpha-acetyl and alpha-phenylsulfonyl substituents. In these cases, exclusive C-H insertion at the N-aryl moiety resulted to give 2(3H)-indolinone products. However, the alpha-substituent effect on the chemoselectivity of the insertion reaction is easily overridden by conformational effects about the amide N-C(O) bond as revealed by the insertion reactions of the conformationally rigid compounds 20a-c. The alpha-substituent effects are reestablished when conformational rigidity is removed, as exemplified by the rhodium carbenoid insertion reactions of compounds 29a,b.
• Stereoselective Synthesis of 2,3-Disubstituted Indoline Diastereoisomers by Chemoenzymatic Processes
  作者：María López-Iglesias、Eduardo Busto、Vicente Gotor、Vicente Gotor-Fernández

  DOI：10.1021/jo301307q

  日期：2012.9.21

  structural motifs such as C-2 and C-3 substitutions (alkyl or aryl), cis/trans relative stereochemistry and functionalization of the aromatic ring (fluoro, methyl or methoxy groups) have been efficiently prepared through Fischer indolization and subsequent diastereoselective reduction of the unprotected indoles. Combination of Candida antarctica lipase type A and allyl 3-methoxyphenyl carbonate has been

  通过Fischer吲哚化已有效制备了外消旋二氢吲哚，包括各种结构基序，例如C-2和C-3取代（烷基或芳基），顺/反相对立体化学和芳香环（氟，甲基或甲氧基）的官能化以及随后的非保护吲哚的非对映选择性还原。的组合南极假丝酵母脂肪酶A型和烯丙基3-甲氧基苯基碳酸酯已经被鉴定为对他们的动力学拆分最好串联，观察对于大多数所测试的二氢吲哚的优良stereodiscriminations。