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(4R,6S)-4,6-dimethyltetrahydropyran-2-one | 52949-99-2

中文名称
——
中文别名
——
英文名称
(4R,6S)-4,6-dimethyltetrahydropyran-2-one
英文别名
(4R,6S)-4,6-dimethyloxan-2-one
(4R,6S)-4,6-dimethyltetrahydropyran-2-one化学式
CAS
52949-99-2
化学式
C7H12O2
mdl
——
分子量
128.171
InChiKey
KSFJZYURRNSMGO-RITPCOANSA-N
BEILSTEIN
——
EINECS
——
  • 物化性质
  • 计算性质
  • ADMET
  • 安全信息
  • SDS
  • 制备方法与用途
  • 上下游信息
  • 反应信息
  • 文献信息
  • 表征谱图
  • 同类化合物
  • 相关功能分类
  • 相关结构分类

物化性质

  • 沸点:
    219.4±8.0 °C(Predicted)
  • 密度:
    0.956±0.06 g/cm3(Predicted)

计算性质

  • 辛醇/水分配系数(LogP):
    1.4
  • 重原子数:
    9
  • 可旋转键数:
    0
  • 环数:
    1.0
  • sp3杂化的碳原子比例:
    0.86
  • 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:
    (4R,6S)-4,6-dimethyltetrahydropyran-2-one二异丁基氢化铝 作用下, 以 甲苯 为溶剂, 生成 (3S,5S)-3-methylhexane-1,5-diol
    参考文献:
    名称:
    Efficient synthesis of the left-hand subunit of milbemycin β3 using a suzuki coupling reaction
    摘要:
    The efficient synthesis of the left-hand subunit of the antiparasitic agent milbemycin beta 3 using a Suzuki coupling is described. The unique role played by thallium carbonate in this palladium-catalysed reaction is discussed. Copyright (C) 1996 Elsevier Science Ltd.
    DOI:
    10.1016/0040-4039(96)00305-x
  • 作为产物:
    描述:
    (2R,8S,10R)-8,10-Dimethyl-2-phenyl-1,5,7-trioxa-spiro[5.5]undecane 在 oxonium 作用下, 生成 (4R,6S)-4,6-dimethyltetrahydropyran-2-one
    参考文献:
    名称:
    A Synthesis of Jaspamide Based on 1,2-Metallate Rearrangements of α-Heteroalkenylmetal Derivatives
    摘要:
    由三肽片段 4 和 (2S,4E,6R,8S)-8-苯甲酰氧基-2,4,6-三甲基壬-4-烯酸 (3) 合成了海洋环肽 Jaspamide (Jasplakinolide)。三肽片段是由δ-酪氨酸衍生物 6、Boc-2-溴肾上腺素(8)和丙氨酸制备而成。δ-酪氨酸衍生物 6 是通过对羟基肉桂酸甲酯的不对称共轭胺化反应制备的。溴苦参碱衍生物 8 由色氨酸制备。合成多酮片段 3 的关键步骤包括金属化二氢吡喃和金属化烯醇氨基甲酸酯衍生物的 1,2-金属化重排。
    DOI:
    10.1055/s-1995-3870
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文献信息

  • Palladium-catalyzed enantioselective hydrogenation of 2-pyrones: evidence for competing reaction mechanisms
    作者:W.-R Huck、T Bürgi、T Mallat、A Baiker
    DOI:10.1016/s0021-9517(03)00166-0
    日期:2003.10.1
    reactant–modifier interactions. These interactions may involve the OH function and the quinuclidine N of the alkaloid modifier. When the reactant possesses an acidic OH group (1a and 2a), the reaction via the energetically most stable bidentate complex controls the enantioselectivity. Protic or basic solvents diminish the ee in these reactions by stabilizing a single-bonded (acid–base type) interaction. Different
    4-羟基-6-甲基-2-吡喃酮(1a),3,6-二甲基-4-羟基-2-吡喃酮(2a),4-甲氧基-6-甲基-2-吡喃酮(3a)的对映选择性氢化,并且在5wt%的Pd / TiO 2催化剂上研究了4,6-二甲基-2-吡喃酮(4a)。各种金鸡纳生物碱及其O-和N-甲基衍生物被用作手性改性剂。催化实验与FTIR,NMR和NOESY-NMR光谱分析以及从头算计算相结合,揭示了反应的一个有趣特征:ee由竞争的反应物-修饰剂相互作用决定。这些相互作用可能涉及生物碱改性剂的OH功能和奎尼丁N。当反应物具有酸性OH基团(1a和2a),通过能量上最稳定的双齿配合物的反应控制了对映选择性。质子或碱性溶剂通过稳定单键(酸碱型)相互作用来减少这些反应中的ee。对于非酸性吡喃酮3a和4a的氢化,提出了不同的机理。这些模型可以很好地解释催化结果,但需要进一步确认。此外,这些研究为手性修饰的Pd的固有速率加速和对映微分过程提供了第一个实验证据。
  • Heterogeneous enantioselective hydrogenation of 2-pyrones over cinchona-modified palladium
    作者:Wolf-Rüdiger Huck、Tamas Mallat、Alfons Baiker
    DOI:10.1039/b108944g
    日期:2002.1.24
    Asymmetric hydrogenation of 4-alkoxy and 4-methyl derivatives of 2-pyrones to the corresponding dihydro- or tetrahydropyrones over cinchona-modified Pd/TiO2 is fast under ambient conditions and affords good yields and high ee. cis-Tetrahydropyrones are obtained with 98–99% de. The ee can be further increased by kinetic resolution.
    不对称 氢化在环境条件下,在金鸡纳改性的Pd / TiO 2上2-吡喃酮的4-烷氧基和4-甲基衍生物转化为相应的二氢-或四氢吡喃酮是快速的并且提供了良好的产率和高ee。顺式-四氢吡喃酮的de含量为98-99%。ee可以通过动力学拆分进一步提高。
  • A method for the chromatographic resolution of tetrahydropyran-2-ones
    作者:Philip Ashworth、Shiddappa L. Belagali、Sharon Casson、Anna Marczak、Philip Kocieński
    DOI:10.1016/s0040-4020(01)80729-8
    日期:1991.12
    The spirocyclic ortholactones prepared from certain tetrahydropyran-2-ones (valerolactones) and (1R)-1-phenylpropan-1,3-diol are readily separable by flash chromatography on silica gel. Hydrolysis of the resolved ortholactones then provides the pure homochiral lactones.
    由某些四氢吡喃-2-酮(戊内酯)和(1R)-1-苯基丙烷-1,3-二醇制备的螺环原内酯很容易通过硅胶快速色谱分离。然后水解分解的原内酯,得到纯的手性内酯。
  • A stereoselective synthesis of trisubstituted alkenes. Part 2. The nickel-catalysed coupling of Grignard reagents with 6-alkyl-3,4-dihydro-2H-pyrans and acyclic enol ethers
    作者:Philip A. Ashworth、Nicholas J. Dixon、Philip J. Kocieński、Sjoerd N. Wadman
    DOI:10.1039/p19920003431
    日期:——
    The Ni0-catalysed coupling of Grignard reagents devoid of beta-hydrogens with 6-alkyl-3,4-dihydro-2H-pyrans and acyclic enol ethers is highly stereoselective and gives trisubstituted alkenes with retention of configuration. The reaction was applied to syntheses of the aggregation pheromone of the square-necked grain beetle, a fragment of Premonensin B, and the polyketide fragment of Jaspamide.
  • Asymmetric Hydrogenation of Substituted 2-Pyrones
    作者:Matthias J. Fehr、Giambattista Consiglio、Michelangelo Scalone、Rudolf Schmid
    DOI:10.1021/jo982215l
    日期:1999.8.1
    Various substituted 2-pyrones have been hydrogenated with high enantioselectivity (up to 97% ee) to the corresponding 5,6-dihydropyrones using cationic ruthenium catalysts containing the (6,6'-dimethoxybiphenyl-2,2'diyl)bis[3,5-di(tert-butyl)phenylphosphine] ligand. When substituents at position 3 are absent, 5,6-dihydropyrones are further hydrogenated to the fully saturated delta-lactones. In the case of 4,6-dimethyl-2H-pyran-2-one, the diastereoselectivity of the second hydrogenation step was determined by the chirality of the applied catalyst, while for the 4,5,6-trimethyl-2H-pyran-2-one a double asymmetric induction effect was observed. Other cyclic substrates with endo- or exocyclic double bonds were hydrogenated, although with substantially lower enantioselectivity with respect to the 2-pyrones.
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