(R)-4-(4'-chlorophenyl)-3-methyl-butan-2-one | 1453502-17-4

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: (R)-4-(4'-chlorophenyl)-3-methyl-butan-2-one
• 英文别名: (3R)-4-(4-chlorophenyl)-3-methylbutan-2-one
• CAS: 1453502-17-4
• 化学式: C₁₁H₁₃ClO
• 分子量: 196.677
• InChiKey: PPFQLGFSWPJTGJ-MRVPVSSYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3
• 重原子数：
  13
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.36
• 拓扑面积：
  17.1
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为产物：
  描述：

  (3Z)-3-(chloromethyl)-4-(4-chlorophenyl)but-3-en-2-one 在 yeast type II from Saccharomyces cerevisiae 作用下， 以 水 为溶剂， 反应 16.0h， 以57%的产率得到(R)-4-(4'-chlorophenyl)-3-methyl-butan-2-one
  参考文献：
  名称：

  Enantiodivergence in the reduction of α-methyl and α-halomethyl enones by microorganisms

  摘要：

  Enones (Z)-3-methyl-(Z)-3-chloromethyl- and (Z)-3-bromomethyl-4-R-3-buten-2-one (R = n-pentyl, phenyl, 2'- and 4'-chlorophenyl, 3'- and 4'-nitrophenyl, 4'-methoxyphenyl) were synthesized and subjected to reduction by the microorganisms Saccharomyces cerevisiae and Geotrichum candidum. Whereas the bioreduction of 3-methy-4-R-3-buten-2-ones afforded the corresponding (S)-4-R-3-methybutan-2-ones, the bioreduction of 3-chloromethyl- and 3-bromomethyl-4-R-3-buten-2-ones afforded the corresponding (R)-4-R-3-methybutan-2-ones. (C) 2013 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2013.07.007

文献信息

• Highly Enantioselective Iridium-Catalyzed Hydrogenation of Conjugated Trisubstituted Enones
  作者：Bram B. C. Peters、Jira Jongcharoenkamol、Suppachai Krajangsri、Pher G. Andersson

  DOI：10.1021/acs.orglett.0c04012

  日期：2021.1.1

  Asymmetric hydrogenation of conjugated enones is one of the most efficient and straightforward methods to prepare optically active ketones. In this study, chiral bidentate Ir–N,P complexes were utilized to access these scaffolds for ketones bearing the stereogenic center at both the α- and β-positions. Excellent enantiomeric excesses, of up to 99%, were obtained, accompanied with good to high isolated

  共轭烯酮的不对称氢化是制备光学活性酮的最有效，最直接的方法之一。在这项研究中，手性双齿Ir-N，P络合物被用于进入这些支架，以获得在α和β位置均具有立体中心的酮。获得了高达99％的出色的对映体过量，并具有良好或较高的分离产率。具有挑战性的二烷基取代的底物（很难通过令人满意的手性诱导进行氢化）以高度对映选择性的方式氢化。
• Bioreduction of α-Acetoxymethyl Enones: Proposal for an S_N2′ Mechanism Catalyzed by Enereductase
  作者：Bruno R. S. Paula、Davila Zampieri、J. Augusto R. Rodrigues、Paulo J. S. Moran

  DOI：10.1002/adsc.201600601

  日期：2016.11.17

  acylated Morita–Baylis–Hillman adduct 1‐acetoxy‐2‐methylene‐1‐phenylbutan‐3‐one produced a mixture of products, with and without the acetoxy group, via three different reaction pathways. In addition to experiments employing whole cells, those in which isolated enereductases were used suggested that the main pathway through which the loss of the acetoxy group occurs during the biocatalytic cascade is an SN2′‐type

  （Z）-3-乙酰氧基甲基-4-R-3-丁烯-2-酮（R =芳基，烷基）和（Z）-3-甲基-4-R-3-丁烯-2-丁烯（R =芳基）合成并通过酿酒酵母进行还原，分别产生（R）-和（S）-4-R-3甲基丁烷-2-。这种立体化学控制策略适用于对映体过量至中度过量的（R）-和（S）-Tropional®的合成。其他（Z）-3-酰氧基甲基-4-苯基-3-丁烯-2-酮的行为与（Z）-3-乙酰氧基甲基对应物和酰化的Morita-Baylis-Hillman加合物1-乙酰氧基-2-亚甲基-1-苯基丁烷-3-酮通过三种不同的反应途径生成了带有或不带有乙酰氧基的产物混合物。除了使用全细胞的实验外，使用分离的烯还原酶的实验还表明，在生物催化级联反应中发生乙酰氧基丢失的主要途径是S N 2'型反应，而不是正式的氢加成反应。消除乙酸。最后，相关的乙基烯酮被酵母白色念珠菌对映体选择性还原，产生（R）-和（S）还原产物，取决于起始原料中乙酰氧基的存在。
• Extractive biocatalysis in the asymmetric reduction of α-alkyl, β-aryl enones by Baker’s yeast
  作者：Rafaela M. Silva、Laura T. Okano、J. Augusto R. Rodrigues、Giuliano C. Clososki

  DOI：10.1016/j.tetasy.2017.05.009

  日期：2017.7

  We prepared various chiral alpha-alkyl, beta-aryl ketones with good to excellent enantiomeric excess through the Baker's yeast asymmetric double-bond reduction of the corresponding alpha,beta-unsaturated substrates adsorbed onto the resin Amberlite XAD-7. This methodology was compatible with substrates bearing both electron-donating and withdrawing groups attached to the aromatic ring. Elongation of the alpha-alkyl substituent of the starting material strongly affected the reactivity and enantioselectivity of the reaction. (C) 2017 Elsevier Ltd. All rights reserved.