L-N-boc-4-[(三氯乙酰胺)甲基]苯丙氨酸 | 170157-59-2

• 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
• 中文名称: L-N-boc-4-[(三氯乙酰胺)甲基]苯丙氨酸
• 英文名称: L-N-Boc-4-<(trichloroacetamide)methyl>phenylalanine
• 英文别名: (2S)-2-[(2-methylpropan-2-yl)oxycarbonylamino]-3-[4-[[(2,2,2-trichloroacetyl)amino]methyl]phenyl]propanoic acid
• CAS: 170157-59-2
• 化学式: C₁₇H₂₁Cl₃N₂O₅
• 分子量: 439.723
• InChiKey: WZCVCMDQFYTQLZ-LBPRGKRZSA-N

物化性质

• 沸点：
  601.9±55.0 °C(Predicted)
• 密度：
  1.382±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.5
• 重原子数：
  27
• 可旋转键数：
  8
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.47
• 拓扑面积：
  105
• 氢给体数：
  3
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  L-N-boc-4-[(三氯乙酰胺)甲基]苯丙氨酸 在 palladium on activated charcoal sodium hydroxide 、 4 A molecular sieve 、 氢气 作用下， 以 乙醇 为溶剂， 反应 26.5h， 生成 (S)-2-tert-Butoxycarbonylamino-3-[4-(isopropylamino-methyl)-phenyl]-propionic acid
  参考文献：
  名称：

  Gonadotropin-Releasing Hormone Antagonists: Novel Members of the Azaline B Family

  摘要：

  A series of antagonists of gonadotropin-releasing hormone (GnRH) homologous to azaline B ([Ac-DNal(1),DCpa(2),DPal(3),Aph(5)(Atz),DAph(6)(Atz),ILys(8),DAla(10)]GnRH) was synthesized, characterized, and tested in a rat antiovulatory assay (AOA). Selected analogues were also tested in both an in vitro dispersed rat pituitary cell culture assay for inhibition of GnRH-stimulated luteinizing hormone release and an in. vitro histamine release assay. The duration of action of some of the most potent and safest analogues in those assays was also determined in the castrated male rat in order to measure the extent (efficacy and duration of action) of inhibition of luteinizing hormone release. Structurally, this series of analogues has novel substitutions (X and Y) in the structure of the azaline B precursor: [Ac-DNal(1),DCpa(2),DPal(3),-Aph(5)(X),DAph(6)(Y),ILys(8),DAla(10)]GnRH. These substitutions were designed to confer increased hydrophilicity as compared to that of azaline B (determined by relative retention times on a C-18 reverse phase column using a triethylammonium phosphate buffer at pH 7.3) or to make them more easily accessible synthetically. Some bulky substituents were introduced in order to probe the spatial limitations of the receptor's cavity. These substitutions include acylated 4-aminophenylalanine at positions 5 and/or 6 (29 analogues), N-alpha-methylated backbone substitutions (six analogues), N-omega-isopropylaminophenylalanine at position 8, and hydrophilic amino acids at position 1. Out of 20 novel analogues tested for long duration position 8, and hydrophilic amino acids at position 1. Out of 20 novel analogues tested for long duration of action in this series, only seven ([Ac-DNal(1),DCpa(2),DPal(3),Aph(5),DAph(6),ILys(8),DAla(10)]GnRH, [Ac-DNal(1),DCpa(2),DPal(3), Aph(5)(For),DAph(6)(For), ILys(8),DAla(10)]GnRH, [Ac-DNal(1),DCpa(2),DPal(3),Aph(5)(Ac),DAph(6)(Ac),- ILys(8),DAla(10)]GnRH (acyline), [Ac-DNal(1),DCpa(2),DPal(3),Aph(5)(Pio),DAph(6)(Pio),ILys(8,)DAla(10)]GnRh, [Ac-DNal(1),DCpa(2),DPal(3),Aph(5)(Atz),DAph(6)(Ac),ILys(8),DAla(10)]GnRH, [Ac-DNalDCpa(2),DPal(3),Aph(5)(Atz-beta Ala),DAph(6)(Atz- beta Ala),ILys(8),DAla(10)]GnRH, [Ac-DNal(1),DCpa2,DPal(3),Aph(5)(Atz-Gab),DAph(6)(Atz-Gab),ILys(8),DAla(10)]GnRH) had relative potencies and/or duration of action comparable to those of azaline B. The others were one-half to one-tenth as effective as azaline B. N-alpha-Methylated backbone substitutions at position 5 yielded analogues that were significantly more hydrophilic presumably because of the breakage of the NH alpha-Tyr(5) to Arg(8)-CO hydrogen bond reported to stabilize a beta-turn encompassing residues 5-8 and which favored beta-sheet formation as shown earlier by Haviv et al.(2) This substitution resulted, however, in an increased potency in the histamine release assay and in significantly shorter duration of action.(3) Similarly, attempts at replacing isopropyllysine in position 8 by either isopropyl-4-aminophenylalanine or isopropyl-4(aminomethyl)phenylalanine resulted in loss of potency in the AOA.Changes in chirality at position 1 or 10 resulted in analogues that were one-tenth and one-half as potent, respectively, as acyline. Introduction of a relatively hydrophilic acetylated residue in position 1 (Ac-4-aminophenylalanine, Ac-2-quinolylalanine, Ac-3-quinolylalanine) also resulted in potent analogues in the AOA in the latter two cases (yet very short acting in the case of ([Ac-D2Qal(1),DCpa(2),DPal(3),Aph(5)(Atz),DAph(6)(Atz),ILys(8),DAla(10)]-GnRH). Introduction of either mesityl, (2-chlorophenyl)isourea, or (3-chlorophenyl)isourea as a substituent on the 4-amino function at residues 5 and 6 of the azaline B precursor was considerably less successful. In this article, we describe in details, improved synthetic protocols for all novel amino acis, N alpha-methylation of amino acids on the resin, and elimination of the undesired N omega-methylation of pyridylalanine at position 3 as the result of base treatment (piperidine or hydrazine) during the deprotection of the Fmoc group or formation of the triazole moiety in the presence of CH2Cl2.

  DOI：

  10.1021/jm00014a017
• 作为产物：
  描述：

  L-苯丙氨酸 在 硫酸 、 sodium carbonate 作用下， 以 1,4-二氧六环 、 水 为溶剂， 生成 L-N-boc-4-[(三氯乙酰胺)甲基]苯丙氨酸
  参考文献：
  名称：

  通过掺入含有氨基酸衍生的磺酰氟的基本侧链，蛋白酶体类胰蛋白酶样位点的有效和高选择性抑制剂。

  摘要：

  已合成了一类独特的包含氨基酸衍生的磺酰氟（SFs）的碱性侧链，用于掺入靶向20S蛋白酶体类胰蛋白酶样位点的新型蛋白酶体抑制剂中。将氨基酸起始衍生物的先前的α-氨基官能团作为叠氮基官能团掩蔽，可以很好地转化为相应的氨基酸衍生的磺酰氟。在P 1处包含不同的SF蛋白酶体抑制剂的位点产生14种不同的肽磺酰氟（PSF），它们对β2亚基的蛋白水解活性比对β5亚基的蛋白水解活性具有高效力和优异的选择性。这项研究的结果强烈表明，PSFs抑制剂的自由N端对于20S蛋白酶体胰蛋白酶样位点的高选择性至关重要。然而，与免疫蛋白酶体相比，所有化合物对组成型的抑制作用都更具选择性。

  DOI：

  10.1021/acs.jmedchem.8b00685

文献信息

• Potent and Highly Selective Inhibitors of the Proteasome Trypsin-like Site by Incorporation of Basic Side Chain Containing Amino Acid Derived Sulfonyl Fluorides
  作者：Raik Artschwager、David J. Ward、Susan Gannon、Arwin J. Brouwer、Helmus van de Langemheen、Hubert Kowalski、Rob M. J. Liskamp

  DOI：10.1021/acs.jmedchem.8b00685

  日期：2018.6.28

  synthesized for incorporation into new proteasome inhibitors targeting the trypsin-like site of the 20S proteasome. Masking the former α-amino functionality of the amino acid starting derivatives as an azido functionality allowed an elegant conversion to the corresponding amino acid derived sulfonyl fluorides. The inclusion of different SFs at the P1 site of a proteasome inhibitor resulted in 14 different peptidosulfonyl

  已合成了一类独特的包含氨基酸衍生的磺酰氟（SFs）的碱性侧链，用于掺入靶向20S蛋白酶体类胰蛋白酶样位点的新型蛋白酶体抑制剂中。将氨基酸起始衍生物的先前的α-氨基官能团作为叠氮基官能团掩蔽，可以很好地转化为相应的氨基酸衍生的磺酰氟。在P 1处包含不同的SF蛋白酶体抑制剂的位点产生14种不同的肽磺酰氟（PSF），它们对β2亚基的蛋白水解活性比对β5亚基的蛋白水解活性具有高效力和优异的选择性。这项研究的结果强烈表明，PSFs抑制剂的自由N端对于20S蛋白酶体胰蛋白酶样位点的高选择性至关重要。然而，与免疫蛋白酶体相比，所有化合物对组成型的抑制作用都更具选择性。
• Gonadotropin-Releasing Hormone Antagonists: Novel Members of the Azaline B Family
  作者：Jean E. Rivier、Guangcheng Jiang、John Porter、Carl Hoeger、A. Grey Craig、Anne Corrigan、Wylie Vale、Catherine L. Rivier

  DOI：10.1021/jm00014a017

  日期：1995.7

  A series of antagonists of gonadotropin-releasing hormone (GnRH) homologous to azaline B ([Ac-DNal(1),DCpa(2),DPal(3),Aph(5)(Atz),DAph(6)(Atz),ILys(8),DAla(10)]GnRH) was synthesized, characterized, and tested in a rat antiovulatory assay (AOA). Selected analogues were also tested in both an in vitro dispersed rat pituitary cell culture assay for inhibition of GnRH-stimulated luteinizing hormone release and an in. vitro histamine release assay. The duration of action of some of the most potent and safest analogues in those assays was also determined in the castrated male rat in order to measure the extent (efficacy and duration of action) of inhibition of luteinizing hormone release. Structurally, this series of analogues has novel substitutions (X and Y) in the structure of the azaline B precursor: [Ac-DNal(1),DCpa(2),DPal(3),-Aph(5)(X),DAph(6)(Y),ILys(8),DAla(10)]GnRH. These substitutions were designed to confer increased hydrophilicity as compared to that of azaline B (determined by relative retention times on a C-18 reverse phase column using a triethylammonium phosphate buffer at pH 7.3) or to make them more easily accessible synthetically. Some bulky substituents were introduced in order to probe the spatial limitations of the receptor's cavity. These substitutions include acylated 4-aminophenylalanine at positions 5 and/or 6 (29 analogues), N-alpha-methylated backbone substitutions (six analogues), N-omega-isopropylaminophenylalanine at position 8, and hydrophilic amino acids at position 1. Out of 20 novel analogues tested for long duration position 8, and hydrophilic amino acids at position 1. Out of 20 novel analogues tested for long duration of action in this series, only seven ([Ac-DNal(1),DCpa(2),DPal(3),Aph(5),DAph(6),ILys(8),DAla(10)]GnRH, [Ac-DNal(1),DCpa(2),DPal(3), Aph(5)(For),DAph(6)(For), ILys(8),DAla(10)]GnRH, [Ac-DNal(1),DCpa(2),DPal(3),Aph(5)(Ac),DAph(6)(Ac),- ILys(8),DAla(10)]GnRH (acyline), [Ac-DNal(1),DCpa(2),DPal(3),Aph(5)(Pio),DAph(6)(Pio),ILys(8,)DAla(10)]GnRh, [Ac-DNal(1),DCpa(2),DPal(3),Aph(5)(Atz),DAph(6)(Ac),ILys(8),DAla(10)]GnRH, [Ac-DNalDCpa(2),DPal(3),Aph(5)(Atz-beta Ala),DAph(6)(Atz- beta Ala),ILys(8),DAla(10)]GnRH, [Ac-DNal(1),DCpa2,DPal(3),Aph(5)(Atz-Gab),DAph(6)(Atz-Gab),ILys(8),DAla(10)]GnRH) had relative potencies and/or duration of action comparable to those of azaline B. The others were one-half to one-tenth as effective as azaline B. N-alpha-Methylated backbone substitutions at position 5 yielded analogues that were significantly more hydrophilic presumably because of the breakage of the NH alpha-Tyr(5) to Arg(8)-CO hydrogen bond reported to stabilize a beta-turn encompassing residues 5-8 and which favored beta-sheet formation as shown earlier by Haviv et al.(2) This substitution resulted, however, in an increased potency in the histamine release assay and in significantly shorter duration of action.(3) Similarly, attempts at replacing isopropyllysine in position 8 by either isopropyl-4-aminophenylalanine or isopropyl-4(aminomethyl)phenylalanine resulted in loss of potency in the AOA.Changes in chirality at position 1 or 10 resulted in analogues that were one-tenth and one-half as potent, respectively, as acyline. Introduction of a relatively hydrophilic acetylated residue in position 1 (Ac-4-aminophenylalanine, Ac-2-quinolylalanine, Ac-3-quinolylalanine) also resulted in potent analogues in the AOA in the latter two cases (yet very short acting in the case of ([Ac-D2Qal(1),DCpa(2),DPal(3),Aph(5)(Atz),DAph(6)(Atz),ILys(8),DAla(10)]-GnRH). Introduction of either mesityl, (2-chlorophenyl)isourea, or (3-chlorophenyl)isourea as a substituent on the 4-amino function at residues 5 and 6 of the azaline B precursor was considerably less successful. In this article, we describe in details, improved synthetic protocols for all novel amino acis, N alpha-methylation of amino acids on the resin, and elimination of the undesired N omega-methylation of pyridylalanine at position 3 as the result of base treatment (piperidine or hydrazine) during the deprotection of the Fmoc group or formation of the triazole moiety in the presence of CH2Cl2.