(S)-6-(2-hydroxy-4-methylphenyl)-2-methylhept-2-en-4-one | 131651-38-2

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 异戊烯醇脂质
• 英文名称: (S)-6-(2-hydroxy-4-methylphenyl)-2-methylhept-2-en-4-one
• 英文别名: (S)-turmeronol B；lurmeroriol B；Turmeronol B；tumeronol B；(6S)-2-Methyl-6-(2-hydroxy-4-methylphenyl)-2-hepten-4-one；(6S)-6-(2-hydroxy-4-methylphenyl)-2-methylhept-2-en-4-one
• CAS: 131651-38-2
• 化学式: C₁₅H₂₀O₂
• 分子量: 232.323
• InChiKey: WYIJOOQDLOBLCP-LBPRGKRZSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.9
• 重原子数：
  17
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.4
• 拓扑面积：
  37.3
• 氢给体数：
  1
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  (R)-2-(2-methoxy-4-methylphenyl)propan-1-ol 在 吡啶 、 三溴化硼 、 三乙胺 、 sodium hydroxide 作用下， 以 四氢呋喃 、 二氯甲烷 、 二甲基亚砜 、 N,N-二甲基甲酰胺 为溶剂， 反应 48.0h， 生成 (S)-6-(2-hydroxy-4-methylphenyl)-2-methylhept-2-en-4-one
  参考文献：
  名称：

  Lipase-mediated resolution of substituted 2-aryl-propanols: application to the enantioselective synthesis of phenolic sesquiterpenes

  摘要：

  A comprehensive study of the lipase-mediated resolution of substituted 2-aryl-propanols is reported. The latter alcohols were submitted to the irreversible acetylation catalyzed either by PPL, CRL, or lipase PS. The enantioselectivity of these transformations was dependent on the type of lipase used. The type of substituents and particularly their position on the aromatic ring strongly affected the selectivity of the reaction. The experiments described prove that PPL is the more versatile lipase catalyzing the acetylation with an enantiomeric ratio (E) value that ranges from 1 up to 144, depending on the substrate used. Conversely, the same transformations were catalyzed by CRL and lipase PS with an enantiomeric ratio value, which is always less than 5. The remarkable behavior of PPL was exploited in the large scale resolution of some substituted 2-aryl-propanols whose enantiomeric forms are relevant building blocks in the enantioselective synthesis of phenolic sesquiterpenes. By these means, the synthesis of (S)-turmeronol B and the formal syntheses of (R)-curcumene, (R)-curcuphenol, (R)-xanthorrhizol, and (R)-curcuhydroquinone were accomplished. (C) 2011 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2011.03.012

文献信息

• Lewis Base-Catalyzed Enantioselective Conjugate Reduction of β,β-Disubstituted α,β-Unsaturated Ketones with Trichlorosilane: <i>E</i>/<i>Z</i>-Isomerization, Regioselectivity, and Synthetic Applications
  作者：Masaharu Sugiura、Yasuhiko Ashikari、Yuka Takahashi、Koki Yamaguchi、Shunsuke Kotani、Makoto Nakajima

  DOI：10.1021/acs.joc.9b01298

  日期：2019.9.20

  The chiral bisphosphine dioxide-catalyzed asymmetric conjugate reduction of acyclic β,β-disubstituted α,β-unsaturated ketones with trichlorosilane affords saturated ketones having a stereogenic carbon center at the carbonyl β-position with high enantioselectivities. Because the E/Z-isomerizations of enone substrates occur concomitantly, reduction products with the same absolute configurations are obtained

  用三氯硅烷手性双膦二氧化物催化的无环β，β-二取代的α，β-不饱和酮的不对称共轭还原，可得到在羰基β-位具有立体碳中心且具有高对映选择性的饱和酮。因为烯酮底物会同时发生E / Z-异构化，所以从（E）-或（Z）-烯。由于其碳正离子稳定能力，在烯酮的β位上存在富电子芳基的情况下，共轭还原被加速。为了阐明观察到的对映选择性的起源，还进行了计算研究。实现了二烯酮的区域和对映选择性的还原，并将其应用于ar- turmerone，turmeronol A，mutisianthol和jungianol，它们是旋光的倍半萜烯的合成。
• Use of 1,1'-Binaphthalene-8,8'-diol as a Chiral Auxiliary for Asymmetric Michael Addition. Application to the Syntheses of Turmeronol A and B.
  作者：Kiyoshi TANAKA、Mohammad NURUZZAMAN、Masato YOSHIDA、Naoyuki ASAKAWA、Xiao-Shen YANG、Kazunori TSUBAKI、Kaoru FUJI

  DOI：10.1248/cpb.47.1053

  日期：——

  Highly diastereoselective Michael addition of lithium diorganocuprates to the half-ester of 1, 1'-binaphthalene-8, 8'-diol gave β-substituted esters with high enantiomeric excess after methanolysis. The optically active phenolic sesquiterpenes turmeronol A (1) and B(2) have been synthesized using this reaction as a key step.

  二愈创木酸锂与 1，1'-联萘-8，8'-二醇的半酯进行高非对映选择性迈克尔加成反应，甲醇分解后得到对映体过量的 β-取代酯。以该反应为关键步骤，合成了具有光学活性的酚类倍半萜化合物松柏醇 A (1) 和 B(2)。