(R)-2,2-dimethyl-5-(1-methyl-1-phenylpropyl)-1,3-dioxane-4,6-dione | 882161-59-3

• 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)-2,2-dimethyl-5-(1-methyl-1-phenylpropyl)-1,3-dioxane-4,6-dione
• 英文别名: (R)-2,2-dimethyl-5-(2-phenylbutan-2-yl)-1,3-dioxane-4,6-dione；2,2-dimethyl-5-[(2R)-2-phenylbutan-2-yl]-1,3-dioxane-4,6-dione
• CAS: 882161-59-3
• 化学式: C₁₆H₂₀O₄
• 分子量: 276.332
• InChiKey: KXWUGPNVQVMMKY-INIZCTEOSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4
• 重原子数：
  20
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  52.6
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  (R)-2,2-dimethyl-5-(1-methyl-1-phenylpropyl)-1,3-dioxane-4,6-dione 在 硫酸 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 3.0h， 生成 (R)-3-methyl-3-phenylpentanoic acid
  参考文献：
  名称：

  Asymmetric Synthesis of All-Carbon Benzylic Quaternary Stereocenters via Cu-Catalyzed Conjugate Addition of Dialkylzinc Reagents to 5-(1-Arylalkylidene) Meldrum's Acids

  摘要：

  The asymmetric synthesis of all-carbon benzylic quaternary stereocenters has been successfully achieved through copper-catalyzed addition of dialkylzinc reagents to 5-(1-arylalkylidene) and 5-(dihydroindenylidene) Meldrum's acids in the presence of phosphoramidite ligand. The resulting benzyl-substituted Meldrum's acids and 1,1-disubstituted indanes were obtained in good yields and up to 99% ee. The significance of substituting the position para, meta, and ortho to the electrophilic benzylic center was highlighted. A benzyl Meldrum's acid product was further transformed to a 3,3-disubstituted 1-indanone and a beta,beta-disubstituted pentanoic acid.

  DOI：

  10.1021/ja056692e
• 作为产物：
  描述：

  苯乙酮 在 吡啶 、 O,O'-(S)-(1,1'-dinaphthyl-2,2'-diyl)-N,N-di-(R,R)-1-phenylethylphosphoric amide 、 四氯化钛 、 copper(II) bis(trifluoromethanesulfonate) 作用下， 以 四氢呋喃 、 乙二醇二甲醚 、 二氯甲烷 为溶剂， 反应 66.08h， 生成 (R)-2,2-dimethyl-5-(1-methyl-1-phenylpropyl)-1,3-dioxane-4,6-dione
  参考文献：
  名称：

  Asymmetric Synthesis of All-Carbon Benzylic Quaternary Stereocenters via Cu-Catalyzed Conjugate Addition of Dialkylzinc Reagents to 5-(1-Arylalkylidene) Meldrum's Acids

  摘要：

  The asymmetric synthesis of all-carbon benzylic quaternary stereocenters has been successfully achieved through copper-catalyzed addition of dialkylzinc reagents to 5-(1-arylalkylidene) and 5-(dihydroindenylidene) Meldrum's acids in the presence of phosphoramidite ligand. The resulting benzyl-substituted Meldrum's acids and 1,1-disubstituted indanes were obtained in good yields and up to 99% ee. The significance of substituting the position para, meta, and ortho to the electrophilic benzylic center was highlighted. A benzyl Meldrum's acid product was further transformed to a 3,3-disubstituted 1-indanone and a beta,beta-disubstituted pentanoic acid.

  DOI：

  10.1021/ja056692e

文献信息

• Asymmetric Synthesis of All-Carbon Benzylic Quaternary Stereocenters via Conjugate Addition to Alkylidene and Indenylidene Meldrum’s Acids
  作者：Ashraf Wilsily、Eric Fillion

  DOI：10.1021/jo901559d

  日期：2009.11.20

  aryl group consistently leading to high enantioselectivities. The nature of the organozinc reagent on the efficiency and selectivity of the conjugate addition was also investigated. The solid-state conformation was determined for a number of alkylidene Meldrum’s acids and correlated with the observed enantioselectivity in relation to the arene pattern of substitution.

  进行了系统的研究，概述了对二烷基锌试剂对5-（1-芳基亚烷基）和茚基亚烷基Meldrum酸的对映选择性1,4-加成。彻底探讨了亚烷基上存在的芳基和烷基的变化。1，4-加成显示与广泛的杂芳族和官能团的相容性，并且芳烃的取代模式影响对映体的选择，对位取代的芳基始终导致高对映选择性。还研究了有机锌试剂对偶联物添加效率和选择性的影响。确定了许多亚烷基Meldrum酸的固态构象，并将其与所观察到的与芳烃取代图案有关的对映选择性相关联。
• Enantioselective Copper-Catalyzed Conjugate Addition of Dimethylzinc to 5-(1-Arylalkylidene) Meldrum’s Acids
  作者：Eric Fillion、Ashraf Wilsily、Tiantong Lou

  DOI：10.1055/s-0029-1216845

  日期：2009.6

  The asymmetric formation of all-carbon quaternary benzylic stereocenters containing a methyl substituent was realized by the enantioselective copper-catalyzed 1,4-addition of dimethylzinc to alkylidene Meldrum’s acids in the presence of a chiral phosphoramidite. Copper source and ligand optimization studies are presented, as well as the scope and limitations of dimethylzinc addition to various alkylidene

  在手性亚磷酰胺的存在下，通过对映选择性铜催化的二甲基锌与亚烷基梅德鲁姆酸的对映选择性铜催化，实现了含甲基取代基的全碳季苄基立体中心的不对称形成。提出了铜源和配体优化研究，以及二甲基锌添加到各种亚烷基Meldrum酸中的范围和局限性。获得了良好至优异的产率和对映选择性。 梅德鲁姆酸-全碳四元立体中心-对映选择性共轭加成-铜催化-有机锌试剂-亚磷酰胺配体
• 10.15227/orgsyn092.0182
  作者：Beaton, Eric、Fillion, Eric

  DOI：10.15227/orgsyn092.0182

  日期：——
• Asymmetric Synthesis of All-Carbon Benzylic Quaternary Stereocenters via Cu-Catalyzed Conjugate Addition of Dialkylzinc Reagents to 5-(1-Arylalkylidene) Meldrum's Acids
  作者：Eric Fillion、Ashraf Wilsily

  DOI：10.1021/ja056692e

  日期：2006.3.1

  The asymmetric synthesis of all-carbon benzylic quaternary stereocenters has been successfully achieved through copper-catalyzed addition of dialkylzinc reagents to 5-(1-arylalkylidene) and 5-(dihydroindenylidene) Meldrum's acids in the presence of phosphoramidite ligand. The resulting benzyl-substituted Meldrum's acids and 1,1-disubstituted indanes were obtained in good yields and up to 99% ee. The significance of substituting the position para, meta, and ortho to the electrophilic benzylic center was highlighted. A benzyl Meldrum's acid product was further transformed to a 3,3-disubstituted 1-indanone and a beta,beta-disubstituted pentanoic acid.