Boc(D)-tryptophan hydrazide

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吲哚及其衍生物
• 英文名称: Boc(D)-tryptophan hydrazide
• 英文别名: (R)-Tert-butyl (1-hydrazinyl-3-(1H-indol-3-YL)-1-oxopropan-2-YL)carbamate；tert-butyl N-[(2R)-1-hydrazinyl-3-(1H-indol-3-yl)-1-oxopropan-2-yl]carbamate
• 化学式: C₁₆H₂₂N₄O₃
• 分子量: 318.376
• InChiKey: PKLIOVIHUWUWBA-CYBMUJFWSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.5
• 重原子数：
  23
• 可旋转键数：
  6
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  109
• 氢给体数：
  4
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  Boc(D)-tryptophan hydrazide 以 乙醇 为溶剂， 反应 64.0h， 生成
  参考文献：
  名称：

  SAR exploration at the C-3 position of tetrahydro-β-carboline sstr3 antagonists

  摘要：

  MK-4256, a tetrahydro-beta-carboline sstr3 antagonist, was discontinued due to a cardiovascular (CV) adverse effect observed in dogs. Additional investigations revealed that the CV liability (QTc prolongation) was caused by the hERG off-target activity of MK-4256 and was not due to sstr3 antagonism. In this Letter, we describe our extensive SAR effort at the C3 position of the tetrahydro-beta-carboline structure. This effort resulted in identification of 5-fluoro-pyridin-2-yl as the optimal substituent on the imidazole ring to balance sstr3 activity and the hERG off-target liability. (C) 2016 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.bmcl.2016.02.022
• 作为产物：
  描述：

  BOC-D-色氨酸 在 氨基邻苯二甲胺 、 盐酸-N-乙基-Nˊ-(3-二甲氨基丙基)碳二亚胺 作用下， 以 二氯甲烷 为溶剂， 反应 24.0h， 生成 Boc(D)-tryptophan hydrazide
  参考文献：
  名称：

  氨基酸作为合成取代的1,2,4-三唑的基础

  摘要：

  我们报道了用苯甲酸银作为环化步骤的关键试剂，合成了被2或3个氨基酸侧链取代的1,2,4-三唑。描述了在合成过程中导致这些化合物的光学纯度保持率的完整研究。此外，还建立了加成环化步骤后的改进后处理，从而提高了产量并生产了不含金属的产品。

  DOI：

  10.1016/j.tet.2011.07.011

文献信息

• Design, Synthesis and Biological Evaluation of a Library of Thiocarbazates and Their Activity as Cysteine Protease Inhibitors
  作者：Zhuqing Liu、Michael C. Myers、Parag P. Shah、Mary Pat Beavers、Phillip A. Benedetti、Scott L. Diamond、Amos B. Smith,III、Donna M. Huryn

  DOI：10.2174/138620710791054303

  日期：2010.5.1

  Recently, we identified a novel class of potent cathepsin L inhibitors, characterized by a thiocarbazate warhead. Given the potential of these compounds to inhibit other cysteine proteases, we designed and synthesized a library of thiocarbazates containing diversity elements at three positions. Biological characterization of this library for activity against a panel of proteases indicated a significant preference for members of the papain family of cysteine proteases over serine, metallo-, and certain classes of cysteine proteases, such as caspases. Several potent inhibitors of cathepsin L and S were identified. The SAR data were employed in docking studies in an effort to understand the structural elements required for cathepsin S inhibition. This study provides the basis for the design of highly potent and selective inhibitors of the papain family of cysteine proteases.

  最近，我们鉴定出一类新型高效组织蛋白酶L抑制剂，其特点是具有硫卡巴脒头部结构。鉴于这些化合物有可能抑制其他半胱氨酸蛋白酶，我们设计并合成了一系列硫卡巴脒类化合物，这些化合物在三个位点上含有多样性元素。该化合物的生物活性鉴定结果显示，它们对木瓜蛋白酶家族的半胱氨酸蛋白酶相较于丝氨酸、金属蛋白酶以及某些类别的半胱氨酸蛋白酶（如胱天蛋白酶）表现出显著的选择性。我们鉴定出了几个高效的组织蛋白酶L和S抑制剂。通过对接研究，我们利用SAR数据来理解实现组织蛋白酶S抑制所需的结构要素。这项研究为设计高度有效且选择性的木瓜蛋白酶家族半胱氨酸蛋白酶抑制剂奠定了基础。
• Enantioselective Synthesis of N-Protected α-Amino Acid Hydrazides
  作者：Jean-Alain Fehrentz、Mathieu Bibian、Sarah El-Habnouni、Jean Martinez

  DOI：10.1055/s-0028-1088013

  日期：2009.4

  A new, mild, general, and efficient synthesis of N-protected α-amino acid hydrazides is described. This two-step preparation uses N-aminophthalimide as protected hydrazine to prepare N-protected α-amino acid hydrazide precursors, and subsequent de­phthaloylation with an aminomethyl polystyrene resin yields N-protected α-amino acid hydrazides. It has the advantages of avoiding the use of the toxic hydrazine reagent and being compatible with the most commonly used N-protecting groups. This strategy is particularly interesting in the case of N-(9-fluorenylmethoxycarbonyl)-protected amino acids. Within the limits of chiral HPLC detection, no epimerization is apparent.

  描述了一种新的、温和的、通用的且高效的N-保护α-氨基酸酰肼合成方法。该两步法利用N-氨基酞菁作为保护性酰肼制备N-保护α-氨基酸酰肼前体，随后通过氨基甲基聚苯乙烯树脂的去酞菁化反应得到N-保护α-氨基酸酰肼。其优点在于避免了使用有毒的酰肼试剂，并与最常用的N-保护基团相容。对于N-(9-芴基甲氧羰基)保护的氨基酸而言，该策略尤为有趣。在手性HPLC检测的限制范围内，未观察到外消旋化现象。
• Amino acids as building blocks for the synthesis of substituted 1,2,4-triazoles
  作者：Mathieu Bibian、Jean Martinez、Jean-Alain Fehrentz

  DOI：10.1016/j.tet.2011.07.011

  日期：2011.9

  We report on the synthesis of 1,2,4-triazoles substituted with 2 or 3 amino acid side chains, using silver benzoate as a key reagent for the cyclization step. A complete study of the optical purity retention during the synthetic process leading to these compounds is described. In addition an improved work-up after the addition-cyclization step was also established leading to better yields and metal-free

  我们报道了用苯甲酸银作为环化步骤的关键试剂，合成了被2或3个氨基酸侧链取代的1,2,4-三唑。描述了在合成过程中导致这些化合物的光学纯度保持率的完整研究。此外，还建立了加成环化步骤后的改进后处理，从而提高了产量并生产了不含金属的产品。
• Identification and synthesis of a unique thiocarbazate cathepsin L inhibitor
  作者：Michael C. Myers、Parag P. Shah、Scott L. Diamond、Donna M. Huryn、Amos B. Smith

  DOI：10.1016/j.bmcl.2007.10.107

  日期：2008.1

  Library samples containing 2,5-disubstituted oxadiazoles were identified as potent hits in a high throughput screen (HTS) of the NIH Molecular Libraries Small Molecule Repository (MLSMR) directed at discovering inhibitors of cathepsin L. However, when synthesized in pure form, the putative actives were found to be devoid of biological activity. Analyses by LC-MS of original library samples indicated the presence of a number of impurities, in addition to the oxadiazoles. Synthesis and bioassay of the probable impurities led to the identification of a thiocarbazate that likely originated via ring opening of the oxadiazole. Previously unknown, thiocarbazates (-)-11 and (-)-12 were independently synthesized as single enantiomers and found to inhibit cathepsin L in the low nanomolar range. (C) 2007 Elsevier Ltd. All rights reserved.
• SAR exploration at the C-3 position of tetrahydro-β-carboline sstr3 antagonists
  作者：Shuwen He、Peter H. Dobbelaar、Liangqin Guo、Zhixiong Ye、Jian Liu、Tianying Jian、Quang Truong、Shrenik K. Shah、Wu Du、Hongbo Qi、Raman K. Bakshi、Qingmei Hong、James D. Dellureficio、Edward Sherer、Alexander Pasternak、Zhe Feng、Mikhail Reibarkh、Melissa Lin、Koppara Samuel、Vijay B. Reddy、Stan Mitelman、Sharon X. Tong、Gary G. Chicchi、Kwei-Lan Tsao、Dorina Trusca、Margaret Wu、Qing Shao、Maria E. Trujillo、Guillermo Fernandez、Donald Nelson、Patricia Bunting、Janet Kerr、Patrick Fitzgerald、Pierre Morissette、Sylvia Volksdorf、George J. Eiermann、Cai Li、Bei B. Zhang、Andrew D. Howard、Yun-Ping Zhou、Ravi P. Nargund、William K. Hagmann

  DOI：10.1016/j.bmcl.2016.02.022

  日期：2016.3

  MK-4256, a tetrahydro-beta-carboline sstr3 antagonist, was discontinued due to a cardiovascular (CV) adverse effect observed in dogs. Additional investigations revealed that the CV liability (QTc prolongation) was caused by the hERG off-target activity of MK-4256 and was not due to sstr3 antagonism. In this Letter, we describe our extensive SAR effort at the C3 position of the tetrahydro-beta-carboline structure. This effort resulted in identification of 5-fluoro-pyridin-2-yl as the optimal substituent on the imidazole ring to balance sstr3 activity and the hERG off-target liability. (C) 2016 Elsevier Ltd. All rights reserved.