(S)-benzyl 4-methyl-2-(4-methylphenylsulfonamido)pentanoate | 82333-01-5

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: (S)-benzyl 4-methyl-2-(4-methylphenylsulfonamido)pentanoate
• 英文别名: (S)-Benzyl4-methyl-2-(4-methylphenylsulfonamido)pentanoate；L-leucine benzyl ester p-toluenesulfonate；4-(tolylsulfonyl)-L-leucine benzyl ester；N-p-Toluolsulfonyl-L-leucin-benzylester；benzyl (2S)-4-methyl-2-[(4-methylphenyl)sulfonylamino]pentanoate
• CAS: 82333-01-5
• 化学式: C₂₀H₂₅NO₄S
• 分子量: 375.489
• InChiKey: VBSWRBJOWZTPPP-IBGZPJMESA-N

物化性质

• 沸点：
  506.6±60.0 °C(Predicted)
• 密度：
  1.172±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  4.4
• 重原子数：
  26
• 可旋转键数：
  9
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.35
• 拓扑面积：
  80.8
• 氢给体数：
  1
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  (S)-benzyl 4-methyl-2-(4-methylphenylsulfonamido)pentanoate 在 palladium on activated charcoal N-甲基吗啉 、 盐酸 、 氢气 、 溶剂黄146 、 三乙胺 、 N,N'-二环己基碳二亚胺 作用下， 以 甲醇 为溶剂， 反应 62.84h， 生成 Boc-Asp(OtBu)-Leu-Ala-Leu
  参考文献：
  名称：

  可生物降解的微球。16.用于从淀粉微粒释放溶酶体的伯氨喹肽间隔物的合成。

  摘要：

  采用经典的肽合成方法合成了四组化合物，并为每组化合物开发了分析方法。其中两个是抗衰老药物伯氨喹（PQ）的四肽衍生物，其一般结构为NH2-X-Leu-Ala-Y-PQ。第一组，Y位置使用Leu，Tyr，Lys和Asp，而X为Ala；第二组，X位置使用Ala，Tyr，Lys和Asp在X位置，Y为Leu。这些衍生物旨在通过其游离的α-氨基与聚丙烯酸酯淀粉微粒（在我们实验室开发的溶同溶性药物载体）偶联。因此，对PQ的溶酶体酶促释放速率的四肽间隔臂的不同氨基酸组成的重要性的系统研究是可能的。第三组 合成了包含缺少游离α-氨基的ε-氨基己酸-PQ衍生物的化合物。这样做是为了研究在这些衍生物的溶酶体降解过程中除氨肽酶以外的酶的重要性。为了允许HPLC分析四肽-PQ衍生物的降解模式，还制备了一些较短的肽-PQ衍生物（第四组）。

  DOI：

  10.1002/jps.2600840226

文献信息

• A class of novel conjugates of substituted purine and Gly-AA-OBzl: Synthesis and evaluation of orally analgesic activity
  作者：Guifeng Kang、Ming Zhao、Xiaoyi Zhang、Li Peng、Chunbo Li、Wei Mao、Weidong Ye、Shiqi Peng

  DOI：10.1016/j.bmcl.2009.05.077

  日期：2010.10

  five-step-reaction procedure and 19 novel conjugates N-[2-chloro-9-(tetrahydropyran-2-yl)-9H-purin-6-yl]-N-cyclopropylglycylamino acid benzylesters were provided. On mouse-tail flick model their in vivo analgesic activities were assayed. The results indicate that introducing Gly-OC2H5 into the 6-position of the substituted purine leads to ambiguous increase of the analgesic activity, while introducing Gly-AA-OBzl

  针对慢性疼痛的化学疗法，通过五步反应方法和19种新型缀合物N- [2-氯-9-（四氢吡喃-2-）偶联了两种止痛药，取代的嘌呤和Gly-AA-OBzl。提供了（yl）-9 H-嘌呤-6-yl] -N-环丙基糖基氨基酸苄酯。在鼠尾轻弹模型上，测定了它们的体内止痛活性。结果表明，将Gly-OC 2 H 5引入取代的嘌呤的6-位导致镇痛活性的模棱两可的增加，而将Gly-AA-OBzl引入该位置导致镇痛活性的显着增加。
• Stereospecific Synthesis of a Novel Farnesyl Protein Transferase Inhibitor Valinoctin A and Its Analogues.
  作者：MAKOTO TSUDA、YASUHIKO MURAOKA、TOMIO TAKEUCHI、RYUICHI SEKIZAWA、KAZUO UMEZAWA

  DOI：10.7164/antibiotics.49.1031

  日期：——

  (2S, 3R)-3-Amino-2-hydroxyoctanoic acid was synthesized by Curtius rearrangement of an azide derivative of (S)-malic acid. Total syntheses of valinoctin A and its analogues were achieved by a coupling of (2S, 3R)-3-amino-2-hydroxyoctanoic acid moiety with L-valine or several other amino acids moieties. 2S configuration of 3-amino-2-hydroxyoctanoic acid moiety was found to be important for the inhibitory activity and the L-valine moiety of valinoctin A was exchangeable with other L-amino acids.

  (2S，3R)-3-氨基-2-羟基辛酸是通过(S)-苹果酸的叠氮衍生物的 Curtius 重排合成的。通过（2S，3R）-3-氨基-2-羟基辛酸与 L-缬氨酸或其他几种氨基酸的偶联，实现了缬氨辛 A 及其类似物的全合成。研究发现，3-氨基-2-羟基辛酸的 2S 构型对抑制活性很重要，而缬氨辛 A 的 L-缬氨酸可与其他 L-氨基酸交换。
• Synthesis and Biological Activity of the Prodrug of Class I Major Histocompatibility Peptide GILGFVFTL Activated by β-Glucuronidase
  作者：Sharad Rawale、Lew M. Hrihorczuk、Wei、Jiri Zemlicka

  DOI：10.1021/jm010352w

  日期：2002.2.1

  The first synthesis of a prodrug of HLA-A.2.1 associated antigenic influenza peptide 2a was accomplished. Two methods for synthesis of prodrugs of antigenic peptides activated by beta-glucuronidase and comprising a self-immolative 3-nitrobenzyloxycarbonyl moiety were investigated. Reaction of P-glucuronic acid glycoside of 4-hydroxy-3-nitrobenzyl alcohol (3) with N,N'-disuccinimidyl carbonate (DSC) followed by conjugation with AlaOMe, Gly, Thr, Phe-Leu, and Leu-Arg gave carbamates 4a-4f. Deacetylation of 4b and 4e with MeONa/MeOH gave beta-glucuronides 5b and 5e. Compound 5e was converted to P-glucuronic acid conjugate 6e by the action of pig liver esterase (PLE). Compound 6e is a substrate for beta-glucuronidase. Method of a direct introduction of the prodrug residue into antigenic nonapeptide GILGFVFTL (2b) failed. Alternately, glycine conjugate 5b was activated to pentafluorophenyl ester 10. Model coupling of 10 with Phe-Leu gave tripeptide conjugate ester 11a which was hydrolyzed by PLE to uronic acid 12. Condensation of 10 with octapeptide ILGFVFTL (9) gave prodrug precursor 11b. Octapeptide 9 was prepared by de novo synthesis using a racemization-free fragment coupling method. Ester hydrolysis with Ba(OH)(2)/MeOH gave the target prodrug 2a which is a substrate for beta-glucuronidase. Prodrug 2a does not bind to HLA-A2.1 of T2 human cells defective in major histocompatibility complex I (MHC I)-associated peptide processing. Addition of beta-glucuronidase restored the binding to the level observed with parent nonapeptide 2b although higher concentrations of prodrug 2a and enzyme were necessary.
• KLIS, W. A.;NAWROCKA, E.;SIEMION, I. Z.
  作者：KLIS, W. A.、NAWROCKA, E.、SIEMION, I. Z.

  DOI：——

  日期：——