(R)-3-methyl-3,4-dihydro-2H-benzo[b][1,4]oxazine | 204926-14-7

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并恶嗪类
• 英文名称: (R)-3-methyl-3,4-dihydro-2H-benzo[b][1,4]oxazine
• 英文别名: (R)-(-)-2,3-dihydro-3-methyl-4H-1,4-benzoxazine；3(R)-methyl-3,4-dihydro-2H-benzo[b][1,4]oxazine；(R)-3,4-dihydro-3-methyl-2H-[1,4]-benzoxazine；(3S)-2,3-dihydro-3-methyl-4H-1,4-benzoxazine；(R)-3-methyl-3,4-dihydro-2H-[1,4]benzoxazine；(R)-2,3-dihydro-3-methyl-4H-1,4-benzoxazine；(3R)-3-methyl-3,4-dihydro-2H-1,4-benzoxazine
• CAS: 204926-14-7
• 化学式: C₉H₁₁NO
• 分子量: 149.192
• InChiKey: BSDVKBWLRCKPFB-SSDOTTSWSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.1
• 重原子数：
  11
• 可旋转键数：
  0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  21.3
• 氢给体数：
  1
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  (R)-3-methyl-3,4-dihydro-2H-benzo[b][1,4]oxazine 在 水 、 三乙胺 、 N,N-二乙基苯胺 、 sodium hydroxide 、 肼 作用下， 以 乙醇 、 二氯甲烷 、 N,N-二甲基乙酰胺 为溶剂， 反应 21.33h， 生成
  参考文献：
  名称：

  Synthesis of novel purin-6-yl conjugates with heterocyclic amines linked via 6-aminohexanoyl fragment

  摘要：

  Novel conjugates of purine and 2-aminopurine linked with heterocyclic amines, including chiral derivatives of 3,4-dihydro-2H-[1,4]benzoxazine, 3,4-dihydro-2H-[1,4]benzothiazine and 1,2,3,4-tetrahydroquinoline, by 6-aminohexanoyl fragment at the 6-position of purine moiety were obtained. For this purpose, replacement of the chlorine atom in 2-amino-6-chloropurine or 6-chloropurine by direct nucleophilic substitution reaction with 6-aminohexanamides or the coupling of 6-(purin-6-ylamino)-6-hexanoic acid with nitrogen heterocycles were used.

  DOI：

  10.1016/j.mencom.2015.11.003
• 作为产物：
  描述：

  N-[N'-tosyl-(2S)-propyl]-(3R)-2,3-dihydro-3-methyl-4H-1,4-benzoxazine 在 盐酸 作用下， 以 溶剂黄146 为溶剂， 反应 40.0h， 以78%的产率得到(R)-3-methyl-3,4-dihydro-2H-benzo[b][1,4]oxazine
  参考文献：
  名称：

  Kinetic resolution of (±)-2,3-dihydro-3-methyl-4H-1,4-benzoxazine, (±)-2-methyl-1,2,3,4-tetrahydroquinoline and (±)-2-methylindoline using N-tosyl-(S)-prolyl chloride

  摘要：

  Acylation of racemic 2,3-dihydro-3-methyl-4H-1,4-benzoxazine, 2-methyl-1,2,3,4-tetrahydroquinoline and 2-methylindoline with N-tosyl-(S)-prolyl chloride resulted in their kinetic resolution with the predominant formation of (R,S)-diastereoisomeric amides. des being 80, 66 and 38%, respectively. Recrystallisation of the amides followed by acid hydrolysis gave individual (R)-enantiomers of heterocyclic amines. (C) 2003 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0957-4166(03)00321-5

文献信息

• Stereoselective Access to 1-[2-Bromo(het)aryloxy]propan-2-amines Using Transaminases and Lipases; Development of a Chemoenzymatic Strategy Toward a Levofloxacin Precursor
  作者：Ángela Mourelle-Insua、María López-Iglesias、Vicente Gotor、Vicente Gotor-Fernández

  DOI：10.1021/acs.joc.6b01828

  日期：2016.10.21

  (91–99% ee) depending on the transaminase source. In a complementary approach, the classical kinetic resolutions of the racemic amines have been investigated using Candida antarctica lipase type B as biocatalyst. Ethyl methoxyacetate was found as a suitable acyl donor leading to the corresponding (S)-amines (90–99% ee) and (R)-amides (88–99% ee) with high selectivity in most of the cases. A preparative

  已开发出两种独立的酶促策略，以合成对映体富集的1- [2-溴（杂）芳氧基]丙烷-2-胺。为了这个目的，已经从可商购的2-溴酚或在芳族环中带有不同图案取代的溴化吡啶衍生物合成了一系列外消旋胺和前手性酮。已经研究了使用酮作为起始原料的生物转氨实验，根据转氨酶的来源，可同时产生具有高选择性（91–99％ee）的（R）-和（S）-胺对映异构体。作为补充方法，使用南极假丝酵母研究了外消旋胺的经典动力学拆分。B型脂肪酶作为生物催化剂。在大多数情况下，发现甲氧基乙酸乙酯是合适的酰基供体，可导致相应的（S）-胺（90-99％ee）和（R）-酰胺（88-99％ee）。已开发出一种制备型生物转氨方法，用于在24小时后以61％的分离产率合成（2 S）-1-（6-溴-2,3-二氟苯氧基）丙-2-胺，这是抗菌剂的宝贵前体左氧氟沙星。
• METHOD FOR PRODUCING OPTICALLY ACTIVE COMPOUND, AND NOVEL METAL-DIAMINE COMPLEX
  申请人：TAKASAGO INTERNATIONAL CORPORATION

  公开号：US20160347678A1

  公开（公告）日：2016-12-01

  The present invention pertains to a method for producing an optically active compound which includes a step for reducing an imino group of an imine compound or a step for reducing an unsaturated bond of a heterocyclic compound, while in the presence of hydrogen gas as a hydrogen donor and one or more types of complexes selected from a group consisting of a complex represented by general formula (1), a complex represented by general formula (2), a complex represented by general formula (3), and a complex represented by general formula (4) (the general formulas (1)-(4) are as stipulated by claim 1 ).

  本发明涉及一种制备光学活性化合物的方法，其中包括在氢气作为氢供体和从一组中选择的一种或多种类型的配合物的存在下，对亚胺化合物的亚胺基进行还原或对杂环化合物的不饱和键进行还原的步骤，所述配合物的选择自一组由一般式（1）表示的配合物、一般式（2）表示的配合物、一般式（3）表示的配合物和一般式（4）表示的配合物（一般式（1）-（4）如权利要求1所规定）。
• Diastereoselective Acylation of Racemic Heterocyclic Amines with N-Tosyl-(S)-Prolyl Chloride and its Structural Analogs
  作者：S. A. Vakarov、D. A. Gruzdev、E. N. Chulakov、L. Sh. Sadretdinova、M. A. Ezhikova、M. I. Kodess、G. L. Levit、V. P. Krasnov

  DOI：10.1007/s10593-014-1538-8

  日期：2014.9

  resolution of racemic amines (2,3-dihydro-4H-1,4-benzoxazine and 1,2,3,4-tetrahydroquinoline derivatives) via diastereoselective acylation with N-tosyl-(S)-prolyl chloride and its structural analogs was performed. The effect of resolving agent structure on the stereoselectivity of heterocyclic amine acylation was examined. The highest stereoselectivity was achieved in the case of acylation with acyl chlorides

  通过N-甲苯磺酰基-（S）-脯氨酰氯的非对映选择性酰化反应得到外消旋胺（2,3-二氢-4H-1,4-苯并恶嗪和1,2,3,4-四氢喹啉衍生物）的动力学拆分的比较研究并进行了结构类似物。考察了拆分剂结构对杂环胺酰化立体选择性的影响。在用带有构象受限的吡咯烷环和在氮原子上的保护基团上的芳族取代基的酰氯酰化的情况下，可获得最高的立体选择性。
• Chemoenzymatic Asymmetric Synthesis of 1,4-Benzoxazine Derivatives: Application in the Synthesis of a Levofloxacin Precursor
  作者：María López-Iglesias、Eduardo Busto、Vicente Gotor、Vicente Gotor-Fernández

  DOI：10.1021/acs.joc.5b00056

  日期：2015.4.17

  A versatile and general route has been developed for the asymmetric synthesis of a wide family of 3-methyl-3,4-dihydro-2H-benzo[b][1,4]oxazines bearing different pattern substitutions in the aromatic ring. Whereas hydrolases were not suitable for resolution of these racemic cyclic nitrogenated amines, alternative chemoenzymatic strategies were designed through independent pathways leading to both amine

  已经开发了一种通用且通用的路线，用于在芳香环中带有不同图案取代的3-甲基-3,4-二氢-2 H-苯并[ b ] [1,4]恶嗪家族的不对称合成。尽管水解酶不适合拆分这些外消旋环状的硝化胺，但通过导致两种胺对映体的独立途径设计了替代的化学酶策略。一方面，生物降解1-（2-硝基苯氧基）丙烷-2-酮可使用红球菌（ADH-A）的醇脱氢酶以高收率回收对映纯（S）-醇，而evo-1.1。 200 ADH导致对方（R）-对映异构体也具有完全的选择性和定量转化率。或者，这些外消旋醇的脂肪酶催化的乙酰化作用，以及乙酸酯类似物的互补水解，使得可以得到具有高立体鉴别性的相应的光学富集的产物。特别吸引人的是六步生产化学酶策略的设计，以生产（S）-（-）-7,8-二氟-3-甲基-3,4-二氢-2 H-苯并-[ b ] [1 ，4]恶嗪，它是抗菌药物左氧氟沙星的关键前体。
• N-Tosyl-(S)-Prolyl Chloride in Kinetic Resolution of Racemic Heterocyclic Amines
  作者：D. A. Gruzdev、S. A. Vakarov、G. L. Levit、V. P. Krasnov

  DOI：10.1007/s10593-014-1432-4

  日期：2014.3

  The kinetic resolution of racemic heterocyclic amines via acylation with N-tosyl-(S)-prolyl chloride was systematically investigated. It was established that racemic mixtures of aromatic amines could be resolved with high efficiency, while the acylation of 2- and 3-methylpiperidines occurred with low diastereoselectivity. A method for the preparation of enantiomerically pure (3R)-7,8-difluoro-3-methyl-3

  系统研究了外消旋杂环胺经N-甲苯磺酰基-（S）-脯氨酰氯酰化的动力学拆分。已经确定，芳族胺的外消旋混合物可以高效分离，而2-和3-甲基哌啶的酰化则以低的非对映选择性发生。开发了制备对映体纯的（3 R）-7,8-二氟-3-甲基-3,4-二氢-2 H- [1,4]苯并恶嗪的方法。