N-BOC-β-Ala-β-Cl-Ala-Ot-Bu | 103711-85-9

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 肽模拟物
• 英文名称: N-BOC-β-Ala-β-Cl-Ala-Ot-Bu
• CAS: 103711-85-9
• 化学式: C₁₅H₂₇ClN₂O₅
• 分子量: 350.843
• InChiKey: MUGRDOVPYJYFGP-JTQLQIEISA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.97
• 重原子数：
  23.0
• 可旋转键数：
  6.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.8
• 拓扑面积：
  93.73
• 氢给体数：
  2.0
• 氢受体数：
  5.0

反应信息

• 作为反应物：
  描述：

  N-BOC-β-Ala-β-Cl-Ala-Ot-Bu 、 三氟乙酸 在 苯甲醚 作用下， 反应 2.0h， 生成 β-alanyl-β-chloro-L-alanine trifluoroacetate
  参考文献：
  名称：

  Chloroalanyl antibiotic peptides: antagonism of their antimicrobial effects by L-alanine and L-alanyl peptides in gram-negative bacteria

  摘要：

  A large number of structurally diverse di- and tripeptides containing the alanine racemase inactivator beta-chloro-L-alanine (beta-Cl-LAla) have been synthesized, and their antibacterial properties in vitro have been evaluated. The dipeptides 1, 3-6, and 8-17 and the tripeptide 20 are all broad-spectrum antibacterial agents with considerable potency against both Gram-positive and Gram-negative species, but none of these peptides improves dramatically on the antibiotic efficacy of the previously described beta-Cl-LAla-beta-Cl-LAla, 9 (Cheung, K. S.; Wasserman, S. A.; Dudek, E.; Lerner, S. A.; Johnston, M. J. Med. Chem. 1983, 26, 1733). Gram-negative microorganisms, such as Escherichia coli, Hemophilus influenzae, Shigella flexneri, and Enterobacter species are consistently resistant to any haloalanyl peptide containing an alanyl residue, such as the dipeptide LAla-beta-Cl-LAla (2) and the tripeptides LMet-LAla-beta-Cl-LAla (7), LAla-LAla-beta-Cl-LAla (18), and LVal-LAla-beta-Cl-LAla (19). Correspondingly, these same organisms are protected from the bactericidal effects of 9 by supplementation of the growth medium with LAla or LAla-LAla. Escherichia coli JSR-O exposed to 9, but protected from lysis by sucrose stabilization, has only about 10% the normal level of intracellular alanine racemase activity. But when these cells are cultured in the presence of 9 with LAla supplementation, or in the presence of 2 with no supplementation, the alanine racemase levels are only about 20-30% below control values. These findings suggest that the resistance of Gram-negative species to chloroalanyl peptides containing alanyl units arises from the ability of LAla to protect the targeted racemase from inactivation by beta-Cl-LAla in vivo, an event which otherwise leads to cell death and lysis. Inactivation of alanine racemase in Gram-positive organisms appears not to be the cellular event that confers sensitivity of these species to a haloalanyl peptide.

  DOI：

  10.1021/jm00160a045
• 作为产物：
  描述：

  Boc-beta-丙氨酸 、 β-Cl-LAla-O-t-Bu * HCl 在 p-nitrobenzophenone oxime resin 、 溶剂黄146 、 N,N-二异丙基乙胺 、 N,N'-二环己基碳二亚胺 作用下， 生成 N-BOC-β-Ala-β-Cl-Ala-Ot-Bu
  参考文献：
  名称：

  Chloroalanyl antibiotic peptides: antagonism of their antimicrobial effects by L-alanine and L-alanyl peptides in gram-negative bacteria

  摘要：

  A large number of structurally diverse di- and tripeptides containing the alanine racemase inactivator beta-chloro-L-alanine (beta-Cl-LAla) have been synthesized, and their antibacterial properties in vitro have been evaluated. The dipeptides 1, 3-6, and 8-17 and the tripeptide 20 are all broad-spectrum antibacterial agents with considerable potency against both Gram-positive and Gram-negative species, but none of these peptides improves dramatically on the antibiotic efficacy of the previously described beta-Cl-LAla-beta-Cl-LAla, 9 (Cheung, K. S.; Wasserman, S. A.; Dudek, E.; Lerner, S. A.; Johnston, M. J. Med. Chem. 1983, 26, 1733). Gram-negative microorganisms, such as Escherichia coli, Hemophilus influenzae, Shigella flexneri, and Enterobacter species are consistently resistant to any haloalanyl peptide containing an alanyl residue, such as the dipeptide LAla-beta-Cl-LAla (2) and the tripeptides LMet-LAla-beta-Cl-LAla (7), LAla-LAla-beta-Cl-LAla (18), and LVal-LAla-beta-Cl-LAla (19). Correspondingly, these same organisms are protected from the bactericidal effects of 9 by supplementation of the growth medium with LAla or LAla-LAla. Escherichia coli JSR-O exposed to 9, but protected from lysis by sucrose stabilization, has only about 10% the normal level of intracellular alanine racemase activity. But when these cells are cultured in the presence of 9 with LAla supplementation, or in the presence of 2 with no supplementation, the alanine racemase levels are only about 20-30% below control values. These findings suggest that the resistance of Gram-negative species to chloroalanyl peptides containing alanyl units arises from the ability of LAla to protect the targeted racemase from inactivation by beta-Cl-LAla in vivo, an event which otherwise leads to cell death and lysis. Inactivation of alanine racemase in Gram-positive organisms appears not to be the cellular event that confers sensitivity of these species to a haloalanyl peptide.

  DOI：

  10.1021/jm00160a045