2-甲基-4H-1,3-苯并二氧杂环己烷-6-甲醛 | 189683-84-9

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并二恶烷
• 中文名称: 2-甲基-4H-1,3-苯并二氧杂环己烷-6-甲醛
• 中文别名: β.-丙氨酸,N-4-2,5-二氯-4-(氟磺酰)苯偶氮基-3-甲基苯基-N-乙基-,2-(氯乙酰基)氧代乙基酯
• 英文名称: 2-methyl-4H-benzo[d][1,3]-dioxane-6-carbaldehyde
• 英文别名: 2-methyl-4H-benzo[1,3]-dioxane-6-carbaldehyde；6-formyl-2-methyl-1,3-benzodioxin；4H-1,3-Benzodioxin-6-carboxaldehyde,2-methyl-(9CI)；2-methyl-4H-1,3-benzodioxine-6-carbaldehyde
• CAS: 189683-84-9
• 化学式: C₁₀H₁₀O₃
• 分子量: 178.188
• InChiKey: OUSHWSCHEPRJRW-UHFFFAOYSA-N

物化性质

• 沸点：
  323.0±42.0 °C(Predicted)
• 密度：
  1.187±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.3
• 重原子数：
  13
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.3
• 拓扑面积：
  35.5
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  2-甲基-4H-1,3-苯并二氧杂环己烷-6-甲醛 在 咪唑 、 sodium tetrahydroborate 、 lithium aluminium tetrahydride 、 扁桃腈裂解酶来源于杏仁 、 二异丁基氢化铝 、 溴化铵 作用下， 以 四氢呋喃 、 异丙醚 、 N,N-二甲基甲酰胺 为溶剂， 反应 45.17h， 生成 (R)-2-tert-butylamino-1-[2-methylbenzo(1,3)dioxin-6-yl]ethanol
  参考文献：
  名称：

  Synthesis of the Adrenergic Bronchodilators (R)-Terbutaline and (R)-Salbutamol from (R)-Cyanohydrins¹

  摘要：

  Stereoselective syntheses of (R)-terbutaline and (R)-salbutamol acetal, which are important bronchodilators, starting from O-protected (R)-cyanohydrins are described. (R)-Terbutaline hydrochloride (R)-9.HCl is obtained in an overall yield of 44% with >98% ee from the O-bisallyl-protected cyanohydrin (R)-4k via a Ritter N-tertiary butylation to the amide (R)-6a, hydrogenation to the amino alcohol (R)-7a, and deprotection of the hydroxyl functions. (R)-Salbutamol acetals (R)-7b,c can be obtained from the corresponding O-protected (R)-cyanohydrins either via the route described for (R)-terbutaline or via selective hydrogenation of the protected cyanohydrin (R)-11 to the imino derivative, transimination with tert-butylamine, followed by hydrogenation with NaBH4 to give the 2-amino alcohol derivative (R)-12. Desilylation of(R)-12 to (R)-7c is performed with LiAlH4. Hydrolytic cleavage of the acetals (R)-7b and c to (R)-salbutamol was not yet possible without racemization.

  DOI：

  10.1021/jo970032d
• 作为产物：
  描述：

  5-溴-2-羟基苯甲醇 在 对甲苯磺酸 、 magnesium 、 1,2-二溴乙烷 作用下， 以 四氢呋喃 、 N,N-二甲基甲酰胺 为溶剂， 反应 34.0h， 生成 2-甲基-4H-1,3-苯并二氧杂环己烷-6-甲醛
  参考文献：
  名称：

  Synthesis of the Adrenergic Bronchodilators (R)-Terbutaline and (R)-Salbutamol from (R)-Cyanohydrins¹

  摘要：

  Stereoselective syntheses of (R)-terbutaline and (R)-salbutamol acetal, which are important bronchodilators, starting from O-protected (R)-cyanohydrins are described. (R)-Terbutaline hydrochloride (R)-9.HCl is obtained in an overall yield of 44% with >98% ee from the O-bisallyl-protected cyanohydrin (R)-4k via a Ritter N-tertiary butylation to the amide (R)-6a, hydrogenation to the amino alcohol (R)-7a, and deprotection of the hydroxyl functions. (R)-Salbutamol acetals (R)-7b,c can be obtained from the corresponding O-protected (R)-cyanohydrins either via the route described for (R)-terbutaline or via selective hydrogenation of the protected cyanohydrin (R)-11 to the imino derivative, transimination with tert-butylamine, followed by hydrogenation with NaBH4 to give the 2-amino alcohol derivative (R)-12. Desilylation of(R)-12 to (R)-7c is performed with LiAlH4. Hydrolytic cleavage of the acetals (R)-7b and c to (R)-salbutamol was not yet possible without racemization.

  DOI：

  10.1021/jo970032d

文献信息

• Structure-Guided Tuning of a Hydroxynitrile Lyase to Accept Rigid Pharmaco Aldehydes
  作者：Yu-Cong Zheng、Fu-Long Li、Zuming Lin、Guo-Qiang Lin、Ran Hong、Hui-Lei Yu、Jian-He Xu

  DOI：10.1021/acscatal.0c01103

  日期：2020.5.15

  benzo-ketal aldehyde which was proved to be resistant against racemization during the deprotection step, with dramatically improved productivity (>95% conversion vs <1%). X-ray structure analysis and kinetic study revealed the side chain of L331 tunes the substrate adaptability of bulky and rigid benzo-ketal aldehyde, thereby facilitating the formation of a series of valuable unnatural cyanohydrins in high

  由酶促氢氰化作用产生的手性邻位C–O / C–N双官能团代表了一种有用的方法。然而，β的药效建设2用这种方法肾上腺素受体激动剂残留的缩醛基脱保护过程中，因为苯甲醇的完全外消旋化的一个巨大的挑战。在这项研究中，对来自李属李（Pc）的羟腈裂解酶进行结构指导的重新设计HNL5）可使硬质苯并缩酮醛发生高度对映选择性的氢氰化反应，事实证明该脱苯酮反应过程中的苯并酮缩醛具有抗外消旋作用，生产率大大提高（转化率> 95％，<1％）。X射线结构分析和动力学研究表明，L331的侧链可调节大体积和刚性苯并缩酮醛的底物适应性，从而有助于以高对映体纯度和高收率形成一系列有价值的非天然氰醇。此外，变体HNL L331A被成功地应用于（的克级化学-酶促合成- [R）-salmeterol，长期β 2肾上腺素受体激动剂，其光学纯形式（> 99％ee）的与总产率54％，是报告的最高值。
• Synthesis of the Adrenergic Bronchodilators (<i>R</i>)-Terbutaline and (<i>R</i>)-Salbutamol from (<i>R</i>)-Cyanohydrins¹
  作者：Franz Effenberger、Jürgen Jäger

  DOI：10.1021/jo970032d

  日期：1997.6.13

  Stereoselective syntheses of (R)-terbutaline and (R)-salbutamol acetal, which are important bronchodilators, starting from O-protected (R)-cyanohydrins are described. (R)-Terbutaline hydrochloride (R)-9.HCl is obtained in an overall yield of 44% with >98% ee from the O-bisallyl-protected cyanohydrin (R)-4k via a Ritter N-tertiary butylation to the amide (R)-6a, hydrogenation to the amino alcohol (R)-7a, and deprotection of the hydroxyl functions. (R)-Salbutamol acetals (R)-7b,c can be obtained from the corresponding O-protected (R)-cyanohydrins either via the route described for (R)-terbutaline or via selective hydrogenation of the protected cyanohydrin (R)-11 to the imino derivative, transimination with tert-butylamine, followed by hydrogenation with NaBH4 to give the 2-amino alcohol derivative (R)-12. Desilylation of(R)-12 to (R)-7c is performed with LiAlH4. Hydrolytic cleavage of the acetals (R)-7b and c to (R)-salbutamol was not yet possible without racemization.