diethyl 4-methylbenzylmalonate | 6619-58-5

• 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: diethyl 4-methylbenzylmalonate
• 英文别名: 2-(4-methylbenzyl)malonic acid diethyl ester；diethyl 2-(4-methylbenzyl)malonate；diethyl 2-[(4-methylphenyl)methyl]propanedioate
• CAS: 6619-58-5
• 化学式: C₁₅H₂₀O₄
• mdl: MFCD23305127
• 分子量: 264.321
• InChiKey: DHHIQFQPINLRHI-UHFFFAOYSA-N

物化性质

• 沸点：
  112-120 °C(Press: 0.5 Torr)
• 密度：
  1.079±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.1
• 重原子数：
  19
• 可旋转键数：
  8
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.466
• 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：

  diethyl 4-methylbenzylmalonate 在 palladium diacetate 、 sodium hydroxide 作用下， 以 乙醇 、 xylene 为溶剂， 反应 12.0h， 生成 vinyl 3-(4-methylphenyl)propanoate
  参考文献：
  名称：

  The effect of vinyl esters on the enantioselectivity of the lipase-catalysed transesterification of alcohols

  摘要：

  The enantioselectivity of the lipase from Pseudomonas cepacia (PCL) in the transesterification of 2-phenyl-1-propanol I was studied using a series of vinyl 3-arylpropanoates as acyl donors. The most enantioselective transesterification reaction of the alcohol was attained by using vinyl 3-(p-iodophenyl)- or 3-(p-trifluoromethylphenyl)propanoates, with enantiomer ratios, E, of 116 and 138, respectively. Vinyl 3-phenylpropanoate was also effective for the resolution of 1 mediated by lipases from P. fluorescens and porcine pancreas and for the PCL-catalysed transesterification of several 2-phenyl-1-alkanols. The enantiomeric resolution of 1 was practically carried out by the first enantioselective transesterification using PCL and vinyl 3-(p-iodophenyl)propanoate to afford (R)-1 and then the enantioselective hydrolysis of the resultant ester to afford (S)-1. (C) 2001 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0957-4166(01)00083-0
• 作为产物：
  描述：

  2-[(4-甲基苯基)亚甲基丙二酸二乙酯 在 magnesium(II) perchlorate 、 1-苯甲基-1,4-二氢烟酰胺 作用下， 以 甲醇 、 乙腈 为溶剂， 反应 8.5h， 以88.9%的产率得到diethyl 4-methylbenzylmalonate
  参考文献：
  名称：

  辅酶NAD（P）H模型还原取代的亚苄基丙二酸二酯中的氢化物转移

  摘要：

  高氯酸镁催化1-苄基-1,4-二氢烟碱酰胺（BNAH）还原取代的亚苄基丙二酸二酯。动力学同位素效应研究表明，BNAH中的C（4）-H键裂解参与速率确定步骤。光谱研究表明，三价络合物是在基态下形成的，而底物与镁离子的络合速度加快。

  DOI：

  10.1016/s0040-4020(01)87921-7

文献信息

• Programmed Sequential Additions to Halogenated Mucononitriles
  作者：Adam J. Zahara、Elsa M. Hinds、Andrew L. Nguyen、Sidney M. Wilkerson-Hill

  DOI：10.1021/acs.orglett.0c03007

  日期：2020.10.16

  synthesized from 2,1,3-benzothiadiazole and undergo conjugate addition/elimination reactions with both nitrogen (40–95% yield) and carbon nucleophiles (72–93% yield). Secondary amines undergo monosubstitutions, while carbon nucleophiles are added twice. The sequence of addition of the nucleophiles could be controlled to give mixed addition products. The multicomponent coupling products could then be

  合成了二卤代甲腈，并对其反应性进行了评估，以评估其作为关键试剂的能力。双（2-氯丙烯腈）和双（2-溴丙烯腈）是由2,1,3-苯并噻二唑合成的，并与氮（40-95％的收率）和碳亲核试剂（72-93％的收率）进行共轭加/消除反应。 。仲胺经历单取代，而碳亲核试剂被添加两次。亲核试剂的添加顺序可以被控制以产生混合的添加产物。然后可以使用分子内环化反应将多组分偶联产物转化为天然产物，例如基序。
• Biocatalytic Desymmetrization of Prochiral 3-Aryl and 3-Arylmethyl Glutaramides: Different Remote Substituent Effect on Catalytic Efficiency and Enantioselectivity
  作者：Yu-Fei Ao、Li-Bin Zhang、Qi-Qiang Wang、De-Xian Wang、Mei-Xiang Wang

  DOI：10.1002/adsc.201800956

  日期：2018.12.3

  efficiently afforded 3‐substituted glutaric acid monoamides in up to 95% yield and >99.5% ee. Even far away from the reaction site, the substituents on the aryl still have a significant effect on the catalytic activity and enantioselectivity and different remote substituent effect was observed for the two types of substrates. The synthetic application of biocatalytic desymmetrization was demonstrated by

  在30°C下于中性磷酸盐缓冲液中用含酰胺酶的红球菌红球菌AJ270微生物全细胞催化剂催化，一系列前手性3-芳基和3-芳基甲基戊二酰胺的不对称水解有效地提供了3-取代的戊二酸单酰胺，收率高达95％和> 99.5％ee。甚至远离反应位点，芳基上的取代基仍然对催化活性和对映选择性具有显着影响，并且对于两种类型的底物观察到不同的远程取代基效果。获得的对映纯（R）-3-取代的4-氨基甲酰基丁酸产物轻松转化为手性二氢喹啉酮和δ证明了生物催化脱对称的合成应用内酯化合物。
• Derivative of thiazolo[3,2-a]pyrimidine and a process for the
  申请人：Teijin Limited

  公开号：US04383996A1

  公开（公告）日：1983-05-17

  A derivative of thiazolo [3,2-a] pyrimidine expressed by formula (I) ##STR1## (where R indicates a phenyl group or a benzyl group which has a halogen atom, a lower alkyl or lower alkyloxy group as a substituent group, an alicyclic group or an arylethyl group), and a process for the preparation of a compound of formula (I) comprising cyclizing a compound expressed by formula (II) by application of heat ##STR2## (where a definition of R is as same as that given in case of formula (I) and R' indicates a halogen atom or lower alkyloxy group). A drug which contains this compound as active ingredient is useful for curing autoimmune diseases such as rheumatoid arthritis, nephritis, etc.

  一种由式（I）表示的噻唑并[3,2-a]嘧啶衍生物##STR1##（其中R表示苯基或苄基，其具有卤原子、较低烷基或较低烷氧基作为取代基，脂环基或芳基乙基基团），以及制备式（I）化合物的方法，包括通过加热使式（II）表示的化合物环化##STR2##（其中R的定义与式（I）情况下给出的相同，R'表示卤原子或较低烷氧基）。包含该化合物作为活性成分的药物对治疗类风湿性关节炎、肾炎等自身免疫疾病有用。
• Unnatural α-amino ethyl esters from diethyl malonate or ethyl β-bromo-α-hydroxyiminocarboxylate
  作者：Eloi P Coutant、Vincent Hervin、Glwadys Gagnot、Candice Ford、Racha Baatallah、Yves L Janin

  DOI：10.3762/bjoc.14.264

  日期：——

  We have explored here the scope of the age-old diethyl malonate-based accesses to α-amino esters involving Knoevenagel condensations of diethyl malonate on aldehydes, reductions of the resulting alkylidenemalonates, the preparation of the corresponding α-hydroxyimino esters and their final reduction. This synthetic pathway turned out to be general although some unexpected limitations were encountered

  我们在这里探索了基于古老的丙二酸二乙酯对α-氨基酯的接触范围，该方法涉及丙二酸二乙酯在醛上的Knoevenagel缩合反应，所得亚烷基丙二酸酯的还原，相应α-羟基亚氨基酯的制备及其最终还原。尽管遇到了一些意想不到的限制，但这种合成途径被证明是通用的。在进行肟化步骤之前，使用Suzuki-Miyaura偶联或环加成法对某些中间体进行了合成修饰，从而获得了更多的α-氨基酯。此外，探索了其他通往α-羟基亚氨基酯的途径，包括试图改善乙基β-溴-α-羟基亚氨基羧酸酯与各种烷基呋喃化合物之间的环加成反应。
• Environmentally benign nucleophilic substitution reaction of arylalkyl halides in water using CTAB as the inverse phase transfer catalyst
  作者：Atul K. Godha、Jayaraman Thiruvengadam、Viswanadhan Abhilash、Prajwal Balgi、A. V. Narayanareddy、Kumaresan Vignesh、Amol V. Gadakh、A. M. Sathiyanarayanan、Sambasivam Ganesh

  DOI：10.1039/c9nj03941d

  日期：——

  An environmentally benign, practically scalable and highly selective C-arylalkylation of active methylene compounds is developed using CTAB as the inverse phase transfer catalyst in water. The methodology developed is elaborated into the one-pot synthesis of quinoline derivatives and also applicable to the regioselective N-aralkyl of 2-pyridones.

  使用CTAB作为水中的反相转移催化剂，开发了一种环境友好，实用可扩展且选择性高的活性亚甲基化合物的C-芳烷基化方法。所开发的方法详述于一锅合成喹啉衍生物中，并且也适用于2-吡啶酮的区域选择性N-芳烷基。