2-benzyl-2-methylcyclohexane-1,3-dione | 127311-61-9

• 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: 2-benzyl-2-methylcyclohexane-1,3-dione
• 英文别名: 2-Methyl-2-benzylcyclohexane-1,3-dione
• CAS: 127311-61-9
• 化学式: C₁₄H₁₆O₂
• 分子量: 216.28
• InChiKey: OGKVDZWFVIESML-UHFFFAOYSA-N

物化性质

• 熔点：
  89 °C
• 沸点：
  358.7±25.0 °C(Predicted)
• 密度：
  1.102±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.3
• 重原子数：
  16
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.43
• 拓扑面积：
  34.1
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  2-benzyl-2-methylcyclohexane-1,3-dione 生成 3-(1-Methyl-2-phenyl-ethyl)-cyclohex-2-enone
  参考文献：
  名称：

  YAMAMOTO, YOSHINORI;FURUTA, TOSHIAKI, J. ORG. CHEM., 55,(1990) N3, C. 3971-3972

  摘要：

  DOI：
• 作为产物：
  描述：

  3-(2,2-dimethylhydrazino)cyclohex-2-en-1-one 在 盐酸 、 正丁基锂 、 potassium hydride 、 碘甲烷 作用下， 以 四氢呋喃 、 六甲基磷酰三胺 为溶剂， 反应 0.08h， 生成 2-benzyl-2-methylcyclohexane-1,3-dione
  参考文献：
  名称：

  Regioselective Alkylations of Cyclic 1,3-Diketonesvia Metalated Dimethylhydrazones

  摘要：

  Cyclic 1,3- diketones 1 are transformed into their 2,2-dimethylhydrazones 2, which can be alkylated regioselectively at different positions after mono-, di-, tri-, and tetrametalation. Monometalated C-2 unsubstituted hydrazones afford C-2 and N-alkylation, monometalated C-2 substituted hydrazones afford only C-2 alkylation. The regioselectivity of the alkylation of the polymetalated hydrazones follows Hauser's rule according to the sequence: NH- > C-4 Ha > C-5 > C-4 Hb. Hydrolysis of the product hydrazones 3-5 afforded mono-and polyalkylated 1,3- diketones 7 in good yields.

  DOI：

  10.1002/prac.19973390199

文献信息

• Two-Carbon Ring-Enlargement of Cyclic 1,3-Diketones to Cyclic 1,5-Diketones
  作者：Jun-ichi Matsuo、Shumpei Kanaya、Yuta Asaji、Tomoyuki Yoshimura

  DOI：10.1055/s-0040-1707862

  日期：2020.7

  3-Hydroxy-3-vinylcycloalkanones, which were prepared from the corresponding cyclic 1,3-diketones by mono-vinylation, were rearranged to two-carbon ring enlarged cyclic 1,5-diketones by treatment with a catalytic amount of potassium tert-butoxide.

  3-羟基-3-乙烯基环烷酮是由相应的环状 1,3-二酮通过单乙烯基化制备的，通过用催化量的叔丁醇钾处理重排为双碳环扩大的环状 1,5-二酮.
• Ionic liquid as catalyst and solvent: the remarkable effect of a basic ionic liquid, [bmIm]OH on Michael addition and alkylation of active methylene compounds
  作者：Brindaban C. Ranu、Subhash Banerjee、Ranjan Jana

  DOI：10.1016/j.tet.2006.10.077

  日期：2007.1

  ketones, carboxylic esters and nitriles. It further catalyzes the addition of thiols to α,β-acetylenic ketones and alkylation of 1,3-dicarbonyl and -dicyano compounds. The Michael addition to α,β-unsaturated ketones proceeds in the usual way, giving the monoaddition products, whereas addition to α,β-unsaturated esters and nitriles leads exclusively to the bis-addition products. The α,β-acetylenic ketones

  碱性离子液体1-甲基-3-丁基咪唑鎓氢氧化物[bmIm] OH催化活性亚甲基化合物与共轭酮，羧酸酯和腈的迈克尔加成反应。它进一步催化将硫醇添加到α，β-炔基酮上，并使1,3-二羰基和-二氰基化合物烷基化。α，β-不饱和酮的迈克尔加成反应以通常的方式进行，得到单加成产物，而α，β-不饱和酯和腈的加成仅导致双加成产物。α，β-炔基酮与硫醇进行双重共轭加成，生成β-酮基1,3-二硫代衍生物。在烷基化反应中，无环的1，3-二酮被单烷基化，而环状酮在相同条件下进行二烷基化。所有这些反应均在没有任何有机溶剂的情况下进行。
• Desymmetric Enantioselective Reduction of Cyclic 1,3-Diketones Catalyzed by a Recyclable <i>P</i>-Chiral Phosphinamide Organocatalyst
  作者：Xu-Long Qin、Ang Li、Fu-She Han

  DOI：10.1021/jacs.1c00277

  日期：2021.2.24

  The P-stereogenic phosphinamides are a structurally novel skeletal class which has not been investigated as chiral organocatalysts. However, chiral cyclic 3-hydroxy ketones are widely used as building blocks in the synthesis of natural products and bioactive compounds. However, general and practical methods for the synthesis of such chiral compounds remain underdeveloped. Herein, we demonstrate that

  的P -stereogenic phosphinamides是还没有被研究作为手性有机催化剂结构上新颖的骨架类。然而，手性环状3-羟基酮被广泛用作天然产物和生物活性化合物合成中的结构单元。但是，合成这类手性化合物的一般和实用方法仍未开发。在此，我们证明了P-立体生成的次膦酰胺是用于环状1，3-二酮的不对称对映选择性还原的有力有机催化剂，为合成手性环状3-羟基酮提供了有用的方法。该协议显示了广泛的底物范围，适用于一系列环状的2,2-二取代的五元和六元1,3-二酮。可以获得具有高对映选择性（高达98％ee）和非对映选择性（高达99：1 dr）的带有全碳手性季中心的手性环状3-羟基酮产物。最重要的是，反应实际上可以以克为单位进行，并且催化剂可以重复使用而不会损害催化效率。机理研究表明，由P形成的中间体-立体生成的次膦酰胺和儿茶酚硼烷是真正的催化活性物质。结果本文公开用于设计和使用显影等反应兆头P
• Enantioselective desymmetrizing palladium catalyzed carbonylation reactions: the catalytic asymmetric synthesis of quaternary carbon center containing 1,3-dienes
  作者：Simon J. Byrne、Anthony J. Fletcher、Paul Hebeisen、Michael C. Willis

  DOI：10.1039/b923186b

  日期：——

  A desymmetrization protocol has been used to develop a palladium catalyzed enantioselective carbonylation process. Achiral cyclic bis-alkenyltriflates are converted to their corresponding monoester derivatives with selectivities of up to 96% ee.

  脱对称方案已用于开发钯催化的对映选择性羰基化过程。非手性环状双烯基三氟甲磺酸酯转化为其相应的单酯 选择性高达96％ee的衍生物。
• Desymmetrization of 1,3-Diones by Catalytic Enantioselective Condensation with Hydrazine
  作者：Binmiao Yang、Jun Dai、Yixin Luo、Kai Kiat Lau、Yu Lan、Zhihui Shao、Yu Zhao

  DOI：10.1021/jacs.1c01366

  日期：2021.3.24

  We present herein an unprecedented desymmetrization of meso 1,3-diones by enantioselective intermolecular condensation. Under the catalysis by a chiral phosphoric acid, a range of readily available 1,3-diones undergo reaction with hydrazines to produce cyclic and acyclic keto-hydrazones bearing an all-carbon quaternary center in high efficiency and enantioselectivity. These compounds are also highly

  我们在此通过对映选择性分子间缩合对内消旋1,3-二酮进行了前所未有的去对称化。在手性磷酸的催化下，一系列容易获得的 1,3-二酮与肼反应以高效和对映选择性产生带有全碳季铵中心的环状和非环状酮腙。这些化合物也非常通用，可用于以优异的立体选择性制备多功能结构单元和杂环。