(R)-2-苄基-2-甲基环氧乙烷 | 165881-60-7

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 中文名称: (R)-2-苄基-2-甲基环氧乙烷
• 英文名称: (R)-2-benzyl-2-methyloxirane
• 英文别名: (2R)-2-benzyl-2-methyloxirane
• CAS: 165881-60-7
• 化学式: C₁₀H₁₂O
• 分子量: 148.205
• InChiKey: HXDOYMSDQUBFHJ-SNVBAGLBSA-N

物化性质

• 沸点：
  208.8±9.0 °C(Predicted)
• 密度：
  1.051±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.1
• 重原子数：
  11
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.4
• 拓扑面积：
  12.5
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  (R)-2-苄基-2-甲基环氧乙烷 在 高氯酸 作用下， 以 1,4-二氧六环 为溶剂， 反应 0.58h， 以79%的产率得到2-甲基-3-苯基丙醛
  参考文献：
  名称：

  Chemoenzymatic deracemization of (±)-2,2-disubstituted oxiranes

  摘要：

  The preparation of vicinal diets in up to 98% e.e. and 98% yield from the corresponding (+/-)-2,2-disubstituted epoxides was achieved via an enantioconvergent two-step hydrolysis: Thus, enantioselective enzymatic hydrolysis of the (S)-epoxide proceeded with retention of configuration furnishing the corresponding (S)-diol. In a subsequent step, the remaining (R)-oxirane was hydrolyzed during workup under acid catalysis with complete inversion of configuration yielding the (S)-diol. A detailed study of the latter reaction revealed that the experimental conditions have to be carefully chosen with respect to (i) nature of the acid, (ii) the solvent, and (iii) its water content to avoid racemization. (C) 1997 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0040-4020(97)10338-6
• 作为产物：
  描述：

  2-benzyl-2-methyloxirane 生成 (R)-2-苄基-2-甲基环氧乙烷
  参考文献：
  名称：

  Biocatalytic resolution of 2-methyl-2-(aryl)alkyloxiranes using novel bacterial epoxide hydrolases

  摘要：

  Biocatalytic resolution of alkyl- and (arylalkyl)-oxiranes was accomplished by employing the epoxide hydrolase activity of lyophilized whole cells of seven bacterial strains belonging to the genera Rhodococcus, Mycobacterium and Nocardia. Whereas no suitable biocatalyst was found for 1-octene oxide, excellent selectivities were obtained with 2-methyl-2-substituted epoxides bearing an alkyl- or (aryl)alkyl side chain. (C) 1997, Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0957-4166(96)00493-4

文献信息

• Engineered P450pyr monooxygenase for asymmetric epoxidation of alkenes with unique and high enantioselectivity
  作者：Aitao Li、Ji Liu、Son Q. Pham、Zhi Li

  DOI：10.1039/c3cc46675b

  日期：——

  A triple mutant of P450pyr monooxygenase (P450pyrTM) catalysed the epoxidation of several para-substituted styrenes as the first enzyme showing high (R)-enantioselectivity and high conversion, demonstrated a broad substrate range, and showed high enantioselectivity for the epoxidation of an unconjugated 1,1-disubstituted alkene, 2-methyl-3-phenyl-1-propene, and a cyclic alkene, N-phenoxycarbonyl-1,2,5,6-tetrahydropyridine, respectively.

  P450pyr单加氧酶的三重突变体（P450pyrTM）作为首个展现出高（R）对映选择性和高转化率的酶，催化了几种对位取代苯乙烯的环氧化反应，其底物范围广泛，并对非共轭的1,1-二取代烯烃——2-甲基-3-苯基-1-丙烯，以及环烯烃——N-苯氧羰基-1,2,5,6-四氢吡啶的环氧化反应表现出高对映选择性。
• Deracemization of (±)-2,2-disubstituted epoxides via enantioconvergent chemoenzymatic hydrolysis using Nocardia EH1 epoxide hydrolase and sulfuric acid
  作者：Romano V.A. Orru、Wolfgang Kroutil、Kurt Faber

  DOI：10.1016/s0040-4039(97)00201-3

  日期：1997.3

  2-Substituted (S)-1,2-diols were prepared in a one-pot procedure with >90% ee and >90% isolated yield via deracemization of (±)-2,2-disubstituted oxiranes through sequential (i) biocatalytic asymmetric hydrolysis using Nocardia EH1 epoxide hydrolase and (ii) acid catalyzed hydrolysis of the remaining oxirane enantiomer.

  一锅法制备2-取代的（S）-1,2-二醇，并通过顺序（i）生物催化对（±）-2,2-二取代的氧杂环己烷进行脱硫，从而获得> 90％ee和> 90％分离的收率使用诺卡氏菌EH1环氧水解酶进行不对称水解，以及（ii）酸催化剩余环氧乙烷对映体的水解。
• Enzyme-Catalyzed Nucleophilic Ring Opening of Epoxides for the Preparation of Enantiopure Tertiary Alcohols
  作者：Maja Majerić Elenkov、H. Wolfgang Hoeffken、Lixia Tang、Bernhard Hauer、Dick B. Janssen

  DOI：10.1002/adsc.200700146

  日期：2007.10.8

  dehalogenase from Agrobacterium radiobacter AD1 (HheC) catalyzes nucleophilic ring opening of epoxides with cyanide and azide. In the case of 2,2-disubstituted epoxides, this reaction proceeds with excellent enantioselectivity (E values up to>200), which gives, by kinetic resolution, access to various enantiopure epoxides and β-substituted tertiary alcohols (ee up to 99 %). Since the enzyme has a broad

  根癌土壤杆菌AD1（HheC）的卤代醇脱卤酶催化氰化物和叠氮化物对环氧化物的亲核开环。在2,2-二取代的环氧化物的情况下，该反应以优异的对映选择性（E值最高> 200）进行，通过动力学拆分，可以得到各种对映纯的环氧化物和β-取代的叔醇（ee高达99％ ）。由于该酶具有广泛的底物范围，并且由于这些叔醇难以用其他方式制备，因此HheC是生产β-氰基和β-叠氮基叔醇的有吸引力的生物催化剂。
• Methods for Obtaining Optically Active Epoxides and Vicinal Diols From 2,2-Disubstituted Epoxides
  申请人：Botes Adriana Leonora

  公开号：US20080286832A1

  公开（公告）日：2008-11-20

  The invention provides yeast strains, and polypeptides encoded by genes of such yeast strains, that have enantiospecific 2,2-disubstituted epoxide hydrolase activity. The invention also features nucleic acid molecules encoding such polypeptides, vectors containing such nucleic acid molecules, and cells containing such vectors. Also embraced by the invention are methods for obtaining optically active 2,2-disubstituted vicinal diols and optically active 2,2-disubstituted epoxides.

  该发明提供了酵母菌株，以及这些酵母菌株基因编码的多肽，具有对映选择性的2,2-二取代环氧乙烷水解酶活性。该发明还涵盖编码这些多肽的核酸分子，包含这些核酸分子的载体以及含有这些载体的细胞。该发明还涵盖了获得光学活性2,2-二取代邻二醇和光学活性2,2-二取代环氧化物的方法。
• Expanding the Scope of Enantioselective Halohydrin Dehalogenases – Group B
  作者：Emina Mehić、Lucija Hok、Qian Wang、Irena Dokli、Marina Svetec Miklenić、Zvjezdana Findrik Blažević、Lixia Tang、Robert Vianello、Maja Majerić Elenkov

  DOI：10.1002/adsc.202200342

  日期：2022.8.2

  (HHDHs) possess an unnatural activity of introducing functionalities such as N3, CN, NO2 etc., into a molecule through the ring-opening reaction of epoxides. The enantioselectivity of HHDHs is substrate-dependent and not always high enough for synthetic applications. B-group of HHDHs has been neglected in the past, due to observed low enantioselectivity based on performance on a relatively limited number

  卤代醇脱卤酶(HHDHs)具有通过环氧化物的开环反应将诸如N 3、CN、NO 2等官能团引入分子中的非天然活性。HHDH 的对映选择性取决于底物，对于合成应用而言并不总是足够高。由于在相对有限数量的底物上的性能观察到的低对映选择性，HHDH 的 B 组过去一直被忽视。广泛筛选来自分枝杆菌的 HheB2 底物。来自棒状杆菌属的 GP1 和 HheB 。进行了 N-1074。发现了几个高度对映选择性的反应（E>200)，与 HheB2 相比，HheB 对更大的底物面板显示出更高的对映选择性和活性。酶 HheB 和 HheB2 高度同源；它们仅相差 4 个残基。通过使用定点诱变，发现与 HheB2 相比，残基 120 和 125 是 HheB 对映选择性更高的原因。计算分析支持实验并提供证据表明 HheB 酶内反应的动力学和热力学参数对于确定观察到的对映选择性至关重要。如本工作所示，由于显着的活性和对映选择性，B