3-Isopropylisochroman-1-one | 107174-19-6

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并吡喃
• 英文名称: 3-Isopropylisochroman-1-one
• 英文别名: (+/-)-3-isopropyl-3,4-dihydroisocoumarin；3-Propan-2-yl-3,4-dihydroisochromen-1-one
• CAS: 107174-19-6
• 化学式: C₁₂H₁₄O₂
• 分子量: 190.242
• InChiKey: SFJYGUPQLMCVAZ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.2
• 重原子数：
  14
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.42
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  3-Isopropylisochroman-1-one 在 三乙基硅烷 、 三氟乙酸 作用下， 以 四氢呋喃 、 二氯甲烷 为溶剂， 反应 4.75h， 生成 cis-1-methyl-3-(1-methylethyl)-3,4-dihydro-1H-2-benzopyran
  参考文献：
  名称：

  Synthesis of deoxyfrenolicin and nanaomycin A

  摘要：

  DOI：

  10.1021/jo00383a018
• 作为产物：
  描述：

  1-羟基-苯并环丁烯 在 甲基锂 、 pyridinium chlorochromate 作用下， 以 四氢呋喃 、 乙醚 、 二氯甲烷 为溶剂， 反应 16.33h， 生成 3-Isopropylisochroman-1-one
  参考文献：
  名称：

  Reaction of Benzocyclobutene Oxides with Aldehydes: Synthesis of Peshawarine and Other 3,4-Dihydroisocoumarins

  摘要：

  Deprotonation of benzocyclobutenols 6 in the presence of aromatic aldehydes affords benzopyranols 7 in high yield. In the key step of this process, an o-tolualdehyde anion generated by the known ring-opening of benzocyclobutenoxides adds to the aldehyde to give 7 which is easily oxidized to 3-substituted 3,4-dihydroisocoumarins 8 including intermediates in some natural product syntheses. For example, reaction of 6-methoxybenzocyclobutenol (1) with LTMP and p-anisaldehyde gave in 96% yield the benzopyranol 16, which subsequently was converted to (+/-)-hydrangenol (17). Similar treatment of 1 with LDA and isovanillin benzyl ether afforded the benzopyranol 19 (87% yield) which already has been converted to (+/-)-phyllodulcin (21). Finally, reaction of 5,6-(methylenedioxy)-benzocyclobutenol (10) with LTMP and the aldehyde 26 (from treatment of hydrastinine with ClCO2-Me) followed by methanolysis produced the acetal 28 in 96% yield. The overall yield was 65% for the five-step synthesis of the alkaloid (+/-)-peshawawine (24) from 10 and 26. Extension of the process to aliphatic aldehydes was illustrated by the preparation of 32 from benzocyclobutenol and isobutyraldehyde in 69% overall yield after oxidation with PCC.

  DOI：

  10.1021/jo00094a022

文献信息

• Synthesis of Chiral 3-Alkyl-3,4-dihydroisocoumarins by Dynamic Kinetic Resolutions Catalyzed by a Baeyer−Villiger Monooxygenase
  作者：Ana Rioz-Martínez、Gonzalo de Gonzalo、Daniel E. Torres Pazmiño、Marco W. Fraaije、Vicente Gotor

  DOI：10.1021/jo902519j

  日期：2010.3.19

  Baeyer−Villiger monooxygenases have been tested in the oxidation of racemic benzofused ketones. When employing a single mutant of phenylacetone monooxygenase (M446G PAMO) under the proper reaction conditions, it was possible to achieve 3-substituted 3,4-dihydroisocoumarins with high yields and optical purities through regioselective dynamic kinetic resolution processes.

  Baeyer-Villiger单加氧酶已在外消旋苯并稠合的酮的氧化中进行了测试。当在适当的反应条件下使用单个突变体的苯丙酮单加氧酶（M446G PAMO）时，可以通过区域选择性动态动力学拆分过程以高收率和光学纯度获得3-取代的3,4-二氢异香豆素。