2,4-diamino-6-methyl-5-(3',4',5'-trimethoxybenzyl)pyrimidine | 21822-27-5

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯酚醚
• 英文名称: 2,4-diamino-6-methyl-5-(3',4',5'-trimethoxybenzyl)pyrimidine
• 英文别名: 6-methyl-5-(3,4,5-trimethoxy-benzyl)-pyrimidine-2,4-diamine；6-Methyl-5-(3,4,5-trimethoxybenzyl)pyrimidine-2,4-diamine；6-methyl-5-[(3,4,5-trimethoxyphenyl)methyl]pyrimidine-2,4-diamine
• CAS: 21822-27-5
• 化学式: C₁₅H₂₀N₄O₃
• 分子量: 304.349
• InChiKey: KUPCMNHSRONILW-UHFFFAOYSA-N

物化性质

• 熔点：
  193-194 °C
• 沸点：
  535.1±60.0 °C(Predicted)
• 密度：
  1.226±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.7
• 重原子数：
  22
• 可旋转键数：
  5
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  106
• 氢给体数：
  2
• 氢受体数：
  7

反应信息

• 作为产物：
  描述：

  3,4,5-三甲氧基苯甲醛 在 sodium methylate 、 二甲基亚砜 作用下， 以 1,4-二氧六环 、 乙醇 、 二甲基亚砜 为溶剂， 生成 2,4-diamino-6-methyl-5-(3',4',5'-trimethoxybenzyl)pyrimidine
  参考文献：
  名称：

  Immobilization of Malarial (Plasmodium falciparum) Dihydrofolate Reductase for the Selection of Tight-Binding Inhibitors from Combinatorial Library

  摘要：

  已经描述了一种基于优先结合固定在Sepharose柱上的酶的选择突变型恶性疟原虫二氢叶酸还原酶（PfDHFRs）的紧密结合抑制剂的简单程序。为了通过S-S键固定到硫丙基-Sepharose凝胶上，制备了在C末端具有半胱氨酸残基的PfDHFRs。估计固定化的DHFRs量为4-5毫克/克干燥凝胶，并且与自由酶的活性相当。制备的固定化酶已被用于从组合库中选择紧密结合抑制剂，基于每个配体与酶的亲和力。然后通过高效液相色谱-质谱法识别和定量分析自由配体，从而实现库中具有高结合亲和力的成分。结果可以通过定量分析通过盐酸胍处理从酶中释放的结合配体来确认。

  DOI：

  10.1021/ac070215s

文献信息

• 2,4-Diamino-5-benzylpyrimidines and analogs as antibacterial agents. 2. C-Alkylation of pyrimidines with Mannich bases and application to the synthesis of trimethoprim and analogs
  作者：Barbara Roth、Justina Z. Strelitz、Barbara S. Rauckman

  DOI：10.1021/jm00178a007

  日期：1980.4

  A new route to 5-(p-hydroxybenzyl)pyrimidines has been developed which utilizes phenolic Mannich bases plus pyrimidines containing at least two activating groups. The products can be alkylated on the phenolic oxygen or on the pyrimidine N-1 atom, depending on conditions. This method has been used to prepare trimethoprim, a broad-spectrum antibacterial agent, starting from 2,4-diaminopyrimidine and

  已经开发出一种新的5-（对羟基苄基）嘧啶的方法，该方法利用酚类曼尼希碱加上含有至少两个活化基团的嘧啶。取决于条件，产物可以在酚氧或嘧啶N-1原子上烷基化。该方法已被用来制备广谱抗菌剂甲氧苄啶，它是从2,4-二氨基嘧啶和2,6-二甲氧基苯酚开始的。
• Development of 2,4-Diaminopyrimidines as Antimalarials Based on Inhibition of the S108N and C59R+S108N Mutants of Dihydrofolate Reductase from Pyrimethamine-Resistant <i>Plasmodium </i><i>f</i><i>alciparum</i>
  作者：Bongkoch Tarnchompoo、Chawanee Sirichaiwat、Worrapong Phupong、Chakapong Intaraudom、Worachart Sirawaraporn、Sumalee Kamchonwongpaisan、Jarunee Vanichtanankul、Yodhathai Thebtaranonth、Yongyuth Yuthavong

  DOI：10.1021/jm010131q

  日期：2002.3.1

  The reduced binding of pyrimethamine to Ser 108Asn (S108N) mutants of parasite dihydrofolate reductase (DHFR), which forms the basis of resistance of Plasmodium falcipartum to pyrimethamine, is largely due to steric constraint imposed by the bulky side chain of N108 on Cl of the 5-p-Cl-phenyl group. This and other S108 mutants with bulky side chains all showed reduced binding to pyrimethamine and cycloguanil. Less effect on binding to some bulky mutants was observed for trimethoprim, with greater flexibility for the 5-substituent. S108N DHFR also binds poorly with other pyrimethamine derivatives with bulky groups in place of the p-Cl, and the binding was generally progressively poorer for the double (C59R+S108N) mutant. Removal of the p-Cl or replacement with m-Cl led to better binding with the mutant DHFRs. Pyrimethamine analogues with unbranched hydrophobic 6-substituents showed generally good binding with the mutant DHFRs. A number of compounds were identified with high affinities for both wild-type and mutant DHFRs, with very low to no affinity to human DHFR. Some of these compounds show good antimalarial activities against pyrimethamine-resistant P. falciparum containing the mutant DHFRs with low cytotoxicity to three mammalian cell lines.
• Target Guided Synthesis of 5-Benzyl-2,4-diamonopyrimidines: Their Antimalarial Activities and Binding Affinities to Wild Type and Mutant Dihydrofolate Reductases from <i>Plasmodium falciparum</i>
  作者：Chawanee Sirichaiwat、Chakapong Intaraudom、Sumalee Kamchonwongpaisan、Jarunee Vanichtanankul、Yodhathai Thebtaranonth、Yongyuth Yuthavong

  DOI：10.1021/jm0303352

  日期：2004.1.1

  The resistance to pyrimethamine (PYR) of Plasmodium falciparum arising from mutation at position 108 of dihydrofolate reductase (pfDHFR) from serine to asparagine (S108N) is due to steric interaction between the bulky side chain of N108 and Cl atom of the 5-p-Cl aryl group of PYR, which consequently resulted in the reduction in binding affinity between the enzyme and inhibitor. Molecular modeling suggested that the flexible antifolate, such as trimethoprim (TMP) derivatives, could avoid this steric constraint and should be considered as new, potentially effective compounds. The hydrophobic interaction between the side chain of inhibitor and the active site of the enzyme around position 108 was enhanced by the introduction of a longer and more hydrophobic side chain on TMP's 5-benzyl moiety. The prepared compounds, especially those bearing aromatic substituents, exhibited better binding affinities to both wild type and mutant enzymes than the parent compound. Binding affinities of these compounds correlated well with their antimalarial. activities against both wild type and resistant parasites. Molecular modeling of the binding of such compounds with pfDHFR also supported the experimental data and clearly showed that aromatic substituents play an important role in enhancing binding affinity. In addition, some compounds with 6-alkyl substituents showed relatively less decrease in binding constants with the mutant enzymes and relatively good antimalarial. activities against the parasites bearing the mutant enzymes.
• ROTH B.; STRELITZ J. Z.; RANCKMAN B. S., I. MED. CHEM., 1980, 23, NO 4, 379-384
  作者：ROTH B.、 STRELITZ J. Z.、 RANCKMAN B. S.

  DOI：——

  日期：——
• Immobilization of Malarial (<i>Plasmodium falciparum</i>) Dihydrofolate Reductase for the Selection of Tight-Binding Inhibitors from Combinatorial Library
  作者：Chawanee Thongpanchang、Supannee Taweechai、Sumalee Kamchonwongpaisan、Yongyuth Yuthavong、Yodhathai Thebtaranonth

  DOI：10.1021/ac070215s

  日期：2007.7.1

  A simple procedure for selection of tight-binding inhibitors of mutant dihydrofolate reductases from Plasmodium falciparum (PfDHFRs) based on preferential binding to the enzyme immobilized on a Sepharose column has been described. PfDHFRs with a cysteine residue at the C-terminal have been prepared in order to immobilize to a thiopropyl-Sepharose gel via S−S linkage. The amount of immobilized DHFRs was estimated to be 4−5 mg/g of dried gel, and the activities of bound DHFRs were comparable to that of free enzymes. The prepared immobilized enzyme has been used for the selection of tight-binding inhibitors from combinatorial libraries, based on the affinities of each ligand with the enzyme. Free ligands were then identified and analyzed quantitatively by high-performance liquid chromatography−mass spectrometry, and the components with high binding affinity of the library could thus be realized. Results could be confirmed by quantitative analysis of the bound ligands released from the enzyme by guanidine hydrochloride treatment.

  已经描述了一种基于优先结合固定在Sepharose柱上的酶的选择突变型恶性疟原虫二氢叶酸还原酶（PfDHFRs）的紧密结合抑制剂的简单程序。为了通过S-S键固定到硫丙基-Sepharose凝胶上，制备了在C末端具有半胱氨酸残基的PfDHFRs。估计固定化的DHFRs量为4-5毫克/克干燥凝胶，并且与自由酶的活性相当。制备的固定化酶已被用于从组合库中选择紧密结合抑制剂，基于每个配体与酶的亲和力。然后通过高效液相色谱-质谱法识别和定量分析自由配体，从而实现库中具有高结合亲和力的成分。结果可以通过定量分析通过盐酸胍处理从酶中释放的结合配体来确认。