(R)-(+)-6-chloro-3-methyl-2,3-dihydro-4H-1-benzopyran-4-one | 141921-58-6

• 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: (R)-(+)-6-chloro-3-methyl-2,3-dihydro-4H-1-benzopyran-4-one
• 英文别名: (3R)-6-chloro-3-methyl-2,3-dihydrochromen-4-one
• CAS: 141921-58-6
• 化学式: C₁₀H₉ClO₂
• 分子量: 196.633
• InChiKey: XZYWJEGILOPDJG-ZCFIWIBFSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.6
• 重原子数：
  13
• 可旋转键数：
  0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.3
• 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：

  (R)-(+)-6-chloro-3-methyl-2,3-dihydro-4H-1-benzopyran-4-one 在 三氯化铝 、 硼烷-叔丁基胺 作用下， 以 二氯甲烷 为溶剂， 反应 4.5h， 以31%的产率得到(S)-(+)-6-chloro-3-methyl-2,3-dihydro-4H-1-benzopyran
  参考文献：
  名称：

  6-Chloro-2,3-dihydro-4H-1-benzopyran carboxylic acids: Synthesis, optical resolution and absolute configuration

  摘要：

  6-Chloro-2,3-dihydro-4H-1-benzopyran-2-carboxylic acid, a rigid analogue of clofibric acid, the active metabolite of the antilipidemic drug clofibrate, has been prepared together with two isomers, 6-chloro-2,3-dihydro-4H-1-benzopyran-3- and 4-carboxylic acids. The three acids have been resolved into their optical antipodes and the absolute configuration established by chemical correlation.

  DOI：

  10.1016/0957-4166(95)00111-2
• 作为产物：
  描述：

  ethyl α-p-chlorophenoxymethylacrylate 在 palladium on activated charcoal 、 钯 甲烷磺酸 、 (1R,2R,3S,4S)-3-Amino-1,7,7-trimethyl-bicyclo[2.2.1]heptan-2-ol 、 氢气 、 lithium hexamethyldisilazane 作用下， 以 四氢呋喃 、 正己烷 、 乙酸乙酯 、 甲苯 、 乙腈 为溶剂， 反应 13.5h， 生成 (R)-(+)-6-chloro-3-methyl-2,3-dihydro-4H-1-benzopyran-4-one
  参考文献：
  名称：

  Access to racemic and enantioenriched 3-methyl-4-chromanones: catalysed asymmetric protonation of corresponding enolic species as the key step

  摘要：

  Bronsted acids induced the intramolecular cyclisation of 3-aryloxypropanoic esters affording 3-methyl-4-chromanones, which have been transformed into the corresponding racemic benzyl beta-oxoesters. These latter esters, in the presence of hydrogen and catalytic amounts of both palladium and (endo, endo) aminobomeol, led to optically active chromanones with up to 75% ee through a deprotection-decarboxylation-protonation cascade reaction. (C) 2003 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2003.09.095

文献信息

• Enantioselective preparation of 2-alkyl-3-aryloxypropionic acids and esters and 3-alkyl-4-chromanones
  作者：Bernard Loubinoux、Christine Viriot-Chauveau、J.L. Sinnes

  DOI：10.1016/0040-4039(92)88162-x

  日期：1992.4

  Lipases provided access to chiral 2-alkyl-3-aryloxypropionic acids that gave chiral 3-alkyl-4-chromanones with high enantioselectivity.
• 6-Chloro-2,3-dihydro-4H-1-benzopyran carboxylic acids: Synthesis, optical resolution and absolute configuration
  作者：Fulvio Loiodice、Antonio Longo、Pasquale Bianco、Vincenzo Tortorella

  DOI：10.1016/0957-4166(95)00111-2

  日期：1995.4

  6-Chloro-2,3-dihydro-4H-1-benzopyran-2-carboxylic acid, a rigid analogue of clofibric acid, the active metabolite of the antilipidemic drug clofibrate, has been prepared together with two isomers, 6-chloro-2,3-dihydro-4H-1-benzopyran-3- and 4-carboxylic acids. The three acids have been resolved into their optical antipodes and the absolute configuration established by chemical correlation.
• Access to racemic and enantioenriched 3-methyl-4-chromanones: catalysed asymmetric protonation of corresponding enolic species as the key step
  作者：Olivier Roy、François Loiseau、Abdelkhalek Riahi、Françoise Hénin、Jacques Muzart

  DOI：10.1016/j.tet.2003.09.095

  日期：2003.11

  Bronsted acids induced the intramolecular cyclisation of 3-aryloxypropanoic esters affording 3-methyl-4-chromanones, which have been transformed into the corresponding racemic benzyl beta-oxoesters. These latter esters, in the presence of hydrogen and catalytic amounts of both palladium and (endo, endo) aminobomeol, led to optically active chromanones with up to 75% ee through a deprotection-decarboxylation-protonation cascade reaction. (C) 2003 Elsevier Ltd. All rights reserved.