(R)-6-甲基四氢吡喃-2-酮 | 43112-32-9

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 内酯类
• 中文名称: (R)-6-甲基四氢吡喃-2-酮
• 中文别名: (R)-6-甲基四氢-2H-吡喃-2-酮
• 英文名称: (R)-(+)-6-methyl-tetrahydropyran-2-one
• 英文别名: (R)-6-Methyltetrahydro-2H-pyran-2-one；(6R)-6-methyloxan-2-one
• CAS: 43112-32-9
• 化学式: C₆H₁₀O₂
• 分子量: 114.144
• InChiKey: RZTOWFMDBDPERY-RXMQYKEDSA-N

物化性质

• 熔点：
  31-32 °C
• 沸点：
  120-140 °C(Press: 11 Torr)
• 密度：
  1.001±0.06 g/cm3(Predicted)
• LogP：
  0.292 (est)

计算性质

• 辛醇/水分配系数(LogP)：
  1
• 重原子数：
  8
• 可旋转键数：
  0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.83
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

安全信息

• 海关编码：
  2932999099

反应信息

• 作为反应物：
  描述：

  (R)-6-甲基四氢吡喃-2-酮 在 lithium aluminium tetrahydride 作用下， 以 四氢呋喃 为溶剂， 生成 1,5-R-己烷二醇
  参考文献：
  名称：

  Optical Resolution of 5-Alkyl-δ-Valerolactones and Synthesis of Optically Active 5-Fluoroalkanols

  摘要：

  Optical resolutions of 5-alkyl-delta-valerolactones were carried out by derivatization to the diastereomeric amides, in which (R)-(+)1-(1-naphthyl)ethylamine or (S)-(-)-1-phenylethylamine were used as resolving agents. Optically active 5-fluoroalkanols, useful intermediates for fluorinated ferroelectric liquid crystals, were derived from the resolved lactones in four steps without racemization.

  DOI：

  10.1080/10242430210707
• 作为产物：
  描述：

  丁位己内酯 在 盐酸 作用下， 以 乙醇 、 苯 为溶剂， 生成 (R)-6-甲基四氢吡喃-2-酮
  参考文献：
  名称：

  Optical Resolution of 5-Alkyl-δ-Valerolactones and Synthesis of Optically Active 5-Fluoroalkanols

  摘要：

  Optical resolutions of 5-alkyl-delta-valerolactones were carried out by derivatization to the diastereomeric amides, in which (R)-(+)1-(1-naphthyl)ethylamine or (S)-(-)-1-phenylethylamine were used as resolving agents. Optically active 5-fluoroalkanols, useful intermediates for fluorinated ferroelectric liquid crystals, were derived from the resolved lactones in four steps without racemization.

  DOI：

  10.1080/10242430210707

文献信息

• Enzymatic Kinetic Resolution and Chemoenzymatic Dynamic Kinetic Resolution of δ-Hydroxy Esters. An Efficient Route to Chiral δ-Lactones
  作者：Oscar Pàmies、Jan-E. Bäckvall

  DOI：10.1021/jo016096c

  日期：2002.2.1

  A successful kinetic resolution of a racemic mixture of delta-hydroxy esters 1 was obtained via lipase-catalyzed transesterification (E value up to 360). The combination of the enzymatic kinetic resolution with a ruthenium-catalyzed alcohol racemization led to an efficient dynamic kinetic resolution (ee up to 99% and conversion up to 92%). The synthetic utility of this procedure was illustrated by

  通过脂肪酶催化的酯交换反应，成功获得了δ-羟基酯1外消旋混合物的动力学拆分结果（E值高达360）。酶促动力学拆分与钌催化的醇外消旋相结合可产生有效的动力学拆分（ee高达99％，转化率高达92％）。该方法的合成实用性通过δ-内酯（R）-6-甲基-和（R）-6-乙基-四氢吡喃-2-酮和（S）-5-（叔丁基二甲基甲硅烷氧基）的实用合成得到说明。肝的 前者是合成天然产物和生物活性化合物的重要基础，而后者则是合成广泛使用的商业杀虫剂Spinosyn A的关键中间体。
• Iridium-Catalyzed Asymmetric Hydrogenation of γ- and δ-Ketoacids for Enantioselective Synthesis of γ- and δ-Lactones
  作者：Yun-Yu Hua、Huai-Yu Bin、Tao Wei、Hou-An Cheng、Zu-Peng Lin、Xing-Feng Fu、Yuan-Qiang Li、Jian-Hua Xie、Pu-Cha Yan、Qi-Lin Zhou

  DOI：10.1021/acs.orglett.9b04253

  日期：2020.2.7

  A highly efficient asymmetric hydrogenation of γ- and δ-ketoacids was developed by using a chiral spiro iridium catalyst (S)-1a, affording the optically active γ- and δ-hydroxy acids/lactones in high yields with excellent enantioselectivities (up to >99% ee) and turnover numbers (TON up to 100000). This protocol provides an efficient and practical method for enantioselective synthesis of Ezetimibe

  通过使用手性螺铱催化剂（S）-1a开发了高效的不对称氢化γ-和δ-酮酸，以高收率提供了光学活性的γ-和δ-羟基酸/内酯，对映选择性极好（高达> 99％ee）和营业额数字（TON最高为100000）。该协议为依泽替米贝的对映选择性合成提供了一种有效而实用的方法。
• Biocatalyst-Mediated Efficient Preparation of Highly Enantiomerically Enriched (<i>R</i>)-5-Hexanolide
  作者：Takeshi Sugai、Keiji Hamada、Tomohiro Akeboshi、Hajime Ikeda、Hiromichi Ohta

  DOI：10.1055/s-1997-972

  日期：1997.8

  Biocatalyst-mediated efficient preparation of highly enantiomerically enriched (R)-5-hexanolide (1) is described. The enantioselective reduction of 5-oxohexanoic acid with Yamadazyma farinosa IFO 10896 and the subsequent lipase-catalyzed kinetic resolution gave (R)-1 in 62% yield with 99.7% e.e.

  本文描述了生物催化剂介导的高效制备高对映体富集度的(R)-5-己内酯（1）的方法。通过Yamadazyma farinosa IFO 10896对5-氧代己酸的对映选择性还原，随后经脂酶催化的动力学拆分，得到了产率为62%、对映体过量值高达99.7%的(R)-1。
• Chirale Synthesebausteine durchKolbe-Elektrolyse enantiomerenreiner ?-Hydroxy-carbons�urederivate. (R)- und (S)-Methyl-sowie (R)-Trifluormethyl-?-butyrolactone und -?-valerolactone
  作者：Dieter Seebach、Philippe Renaud

  DOI：10.1002/hlca.19850680829

  日期：1985.12.18

  Chiral Building Blocks for Syntheses by Kolbe Electrolysis of Enantiomerically Pure β-Hydroxybutyric-Acid Derivatives. (R)- and (S)-Methyl-, and (R)-Trifluoromethyl-γ-butyrolactones, and -δ-valerolactones

  对映体纯的β-羟基丁酸衍生物的Kolbe电解合成手性结构单元。（R）-和（S）-甲基-和（R）-三氟甲基-γ-丁内酯和-δ-戊内酯
• Biocatalytic Characterization of Human FMO5: Unearthing Baeyer–Villiger Reactions in Humans
  作者：Filippo Fiorentini、Martina Geier、Claudia Binda、Margit Winkler、Kurt Faber、Mélanie Hall、Andrea Mattevi

  DOI：10.1021/acschembio.5b01016

  日期：2016.4.15

  physiological role) has long remained unexplored. In this study, we demonstrate the atypical in vitro activity of human FMO5 as a Baeyer–Villiger mono-oxygenase on a broad range of substrates, revealing the first example to date of a human protein catalyzing such reactions. The isolated and purified protein was active on diverse carbonyl compounds, whereas soft nucleophiles were mostly non- or poorly

  含黄素的单加氧酶被称为有效的药物代谢酶，为经过充分研究的细胞色素P450单加氧酶提供补充功能。虽然人类FMO同工型通常参与软亲核试剂的氧化，但人类FMO5的生物催化活性（及其生理作用）长期以来尚未得到开发。在这项研究中，我们证明了非典型的体外FMO5作为Baeyer-Villiger单加氧酶在多种底物上的活性，揭示了迄今为止人类蛋白催化此类反应的第一个例子。分离和纯化的蛋白质对多种羰基化合物具有活性，而柔软的亲核试剂大多不具有反应性或反应性较差。到目前为止，典型特征序列基序的缺失使人类FMO5与所有特征化的Baeyer-Villiger单加氧酶不同。这些发现为人类的氧化代谢开辟了新的前景。