(R)-5-ethoxycarbonyl-6-methyl-4-(4-methylphenyl)-3,4-dihydropyrimidin-2(1H)-one | 854019-25-3

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二嗪类
• 英文名称: (R)-5-ethoxycarbonyl-6-methyl-4-(4-methylphenyl)-3,4-dihydropyrimidin-2(1H)-one
• 英文别名: ethyl (R)-6-methyl-2-oxo-4-(p-tolyl)-1,2,3,4-tetrahydropyrimidine-5-carboxylate；5-ethoxycarbonyl-6-methyl-4-(4-methylphenyl)-3,4-dihydropyrimidin-2(1H)-one；(R)-5-ethoxycarbonyl-6-methyl-4-(p-tolyl)-3,4-dihydropyrimidin-2(1H)-one；ethyl (4R)-6-methyl-4-(4-methylphenyl)-2-oxo-3,4-dihydro-1H-pyrimidine-5-carboxylate
• CAS: 854019-25-3
• 化学式: C₁₅H₁₈N₂O₃
• 分子量: 274.32
• InChiKey: KTAAWYJATJFYRS-CYBMUJFWSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.7
• 重原子数：
  20
• 可旋转键数：
  4
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  67.4
• 氢给体数：
  2
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  6-甲基-4-(4-甲基苯基)-2-氧代-3,4-二氢-1H-嘧啶-5-羧酸乙酯 在 tetraproline chiral stationary phase packed on HPLC column 作用下， 以 正己烷 、 异丙醇 为溶剂， 生成 (R)-5-ethoxycarbonyl-6-methyl-4-(4-methylphenyl)-3,4-dihydropyrimidin-2(1H)-one 、 (S)-(+)-5-ethoxycarbonyl-6-methyl-4-(4-methylphenyl)-3,4-dihydropyrimidin-2(1H)-one
  参考文献：
  名称：

  四脯氨酸手性固定相的溶液相合成和评价

  摘要：

  开发了一种协议方案，用于溶液相合成多克数量的两个9-芴基甲氧基羰基（Fmoc）保护的四脯氨酸肽。然后将这些四脯氨酸肽连接到氨基衍生的硅胶上。用三甲基乙酰基取代Fmoc基团会导致两个四脯氨酸手性固定相（CSP）。将这两种溶液相合成的四脯氨酸CSP与通过逐步固相合成制备的CSP的色谱行为进行比较，结果表明，这三种溶液均具有相似的色谱性能，可分离53种模型分析物。这表明寡聚脯氨酸的溶液相合成具有良好的批次重现性，选择器均质性以及可能的低成本等特定优势，是寡聚脯氨酸CSP固相合成的可行替代方法。手性，2012年。©2012 Wiley Periodicals，Inc.。

  DOI：

  10.1002/chir.22001

文献信息

• An Enantioselective Biginelli Reaction Catalyzed by a Simple Chiral Secondary Amine and Achiral Brønsted Acid by a Dual-Activation Route
  作者：Junguo Xin、Lu Chang、Zongrui Hou、Deju Shang、Xiaohua Liu、Xiaoming Feng

  DOI：10.1002/chem.200701581

  日期：2008.3.27

  An enantioselective Biginelli reaction that proceeds by a dual-activation route has been developed by using a combined catalyst of a readily available trans-4-hydroxyproline-derived secondary amine and a Bronsted acid. Aromatic, heteroaromatic, and fused-ring aldehydes were found to be suitable substrates for this multicomponent reaction. The corresponding dihydropyrimidines were obtained in moderate-to-good

  通过使用容易获得的反式4-羟基脯氨酸衍生的仲胺和布朗斯台德酸的组合催化剂，已经开发了通过双活化途径进行的对映选择性比吉内利反应。发现芳族，杂芳族和稠环醛是该多组分反应的合适底物。在温和条件下，以中等至良好的收率获得了相应的二氢嘧啶，收率高达98％ee。根据实验结果和观察到的产物的绝对构型，提出了一个合理的过渡态来解释激活和不对称诱导的起源。
• Highly enantioselective Biginelli reaction catalyzed by a simple chiral primary amine catalyst: asymmetric synthesis of dihydropyrimidines
  作者：Da-Zhen Xu、Hui Li、Yongmei Wang

  DOI：10.1016/j.tet.2012.07.027

  日期：2012.9

  Several chiral primary amines were introduced as organocatalysts for the asymmetric Biginelli reaction. The reaction was performed by using a combined catalyst consisting of a chiral bifunctional primary amine–pyridine 5j and hydrochloric acid in a mixed solvent of 1,4-dioxane/CHCl3 (8/2, v/v) at room temperature. The corresponding dihydropyrimidines were obtained in moderate to high yields with up

  几种手性伯胺被引入作为不对称Biginelli反应的有机催化剂。反应是在室温下，使用由手性双官能伯胺-吡啶5j和盐酸组成的混合催化剂在1,4-二恶烷/ CHCl 3（8/2，v / v）的混合溶剂中进行的。在温和条件下，以中等至高收率获得了相应的二氢嘧啶，其中ee高达> 99％。
• Towards Enzyme-like, Sustainable Catalysis: Switchable, Highly Efficient Asymmetric Synthesis of Enantiopure Biginelli Dihydropyrimidinones or Hexahydropyrimidinones
  作者：V. J. Lillo、J. M. Saá

  DOI：10.1002/chem.201604433

  日期：2016.11.21

  Organocatalysts displaying a network of cooperative hydrogen bonds (NCHB) have been employed in an enzyme‐like manner for a direct, switchable synthesis of enantiopure hexahydropyrimidinones (HHPMs) or dihydropyrimidinones (DHPMs), which starts at a common, easily accessible α‐ureidosulfone stage. The NCHB organocatalyst exploits all its potential as a pure hydrogen‐bond biomimetic catalyst even in

  具有协同氢键网络（NCHB）的有机催化剂已以类似酶的方式用于直接，可转换的对映纯六氢嘧啶酮（HHPM）或二氢嘧啶酮（DHPM）的合成，其起始于常见的易于获得的α-脲基砜阶段。NCHB有机催化剂即使在存在有机碱的情况下，也可以发挥其作为纯氢键仿生催化剂的全部潜力。这种单锅，非对映和对映选择性合成方法已被证明是可靠，可扩展，高效且对环境无害的。首次报道了一种直接，真正实用的对映纯HHPMs。
• Highly Enantioselective Biginelli Reaction Promoted by Chiral Bifunctional Primary Amine-Thiourea Catalysts: Asymmetric Synthesis of Dihydropyrimidines
  作者：Yangyun Wang、Haitao Yang、Jipan Yu、Zhiwei Miao、Ruyu Chen

  DOI：10.1002/adsc.200900597

  日期：2009.12

  reaction was performed by using a combined catalyst consisting of a chiral bifunctional primary amine-thiourea 9f and a Brønsted acid with tert-butylammonium trifluoroacetate (t-BuNH2⋅TFA) as additive in dichloromethane at room temperature. The possible mechanism for the reaction has been proposed to explain the origin of the activation and the asymmetric induction.

  通过Biginelli反应，以中等至高收率（高达99％ee）实现了二氢嘧啶（DHPM）的非对映特异性形成。将反应物通过使用由手性双官能伯胺-硫脲的组合的催化剂进行9F和布朗斯台德酸与叔-butylammonium三氟乙酸盐（叔BuNH 2 ⋅TFA）在室温下在二氯甲烷中的添加剂。已经提出了反应的可能机理来解释活化和不对称诱导的起源。
• Primary Amine Catalyzed Biginelli Reaction for the Enantioselective Synthesis of 3,4-Dihydropyrimidin-2(1H)-ones
  作者：Derong Ding、Cong-Gui Zhao

  DOI：10.1002/ejoc.201000448

  日期：——

  Several chiral primary amines, mainly those derived from the cinchona alkaloids, were evaluated as the organocatalysts for the asymmetric Biginelli reaction. With the quinine-derived amine catalyst 1 and after extensive optimization of the reaction conditions, 3,4-dihydropyrimidin-2(1H)-ones were obtained in moderate to good yields and 51-78% ee from a three-component reaction of aryl and aliphatic

  几种手性伯胺，主要来自金鸡纳生物碱，被评估为不对称 Biginelli 反应的有机催化剂。使用奎宁衍生的胺催化剂 1 和反应条件的广泛优化后，3,4-二氢嘧啶-2(1H)-酮以中等至良好的收率和 51-78% ee 从芳基的三组分反应中获得和脂肪醛、尿素和乙酰乙酸酯。