tert-butyl(dimethyl)silyl 3-O-benzyl-4,6-O-benzylidene-2-dimethylmaleimido-2-deoxy-β-D-glucopyranoside | 666728-54-7

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡喃二恶英
• 英文名称: tert-butyl(dimethyl)silyl 3-O-benzyl-4,6-O-benzylidene-2-dimethylmaleimido-2-deoxy-β-D-glucopyranoside
• 英文别名: 1-[(2R,4aR,6S,7R,8R,8aS)-6-[tert-butyl(dimethyl)silyl]oxy-2-phenyl-8-phenylmethoxy-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-7-yl]-3,4-dimethylpyrrole-2,5-dione
• CAS: 666728-54-7
• 化学式: C₃₂H₄₁NO₇Si
• 分子量: 579.766
• InChiKey: YMEAFNHEYAKDQV-KHQAINAVSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.51
• 重原子数：
  41
• 可旋转键数：
  8
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  83.5
• 氢给体数：
  0
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  tert-butyl(dimethyl)silyl 3-O-benzyl-4,6-O-benzylidene-2-dimethylmaleimido-2-deoxy-β-D-glucopyranoside 在 吡啶 、 sodium hydroxide 、 三氟甲磺酸三甲基硅酯 、 4 A molecular sieve 、 4 Angstroem molecular seives 、 四丁基氟化铵 、 sodium methylate 、 sodium hydride 、 1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下， 以 四氢呋喃 、 1,4-二氧六环 、 甲醇 、 二氯甲烷 、 水 、 N,N-二甲基甲酰胺 为溶剂， 反应 10.5h， 生成 methyl 2-acetamido-3-O-benzyl-4,6-O-benzylidene-2-deoxy-β-D-glucopyranosyl-(1->4)-2-acetamido-6-O-benzyl-3-O-((R)-1'-carboxyethyl)-2-deoxy-β-D-glucopyranoside
  参考文献：
  名称：

  Synthetic Peptidoglycan Substrates for Penicillin-Binding Protein 5 of Gram-Negative Bacteria

  摘要：

  The major constituent of the bacterial cell wall, peptidoglycan, is comprised of repeating units of N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM) with an appended peptide. Penicillin-binding proteins (PBPs) are involved in the final stages of bacterial cell wall assembly. Two activities for PBPs are the cross-linking of the cell wall, carried out by DD-transpeptidases, and the DD-peptidase activity, that removes the terminal D-Ala residue from peptidoglycan. The DD-peptidase activity moderates the extent of the cell wall cross-linking. There exists a balance between the two activities that is critical for the well-being of bacterial cells. We have cloned and purified PBP5 of Escherichia coli. The membrane anchor of this protein was removed, and the enzyme was obtained as a soluble protein. Two fragments of the polymeric cell wall of Gram-negative bacteria (compounds 5 and 6) were synthesized. These molecules served as substrates for PBP5. The products of the reactions of PBP5 and compounds 5 and 6 were isolated and were shown to be D-Ala and the fragments of the substrates minus the terminal D-Ala. The kinetic parameters for these enzymic reactions were evaluated. PBP5 would appear to have the potential for turnover of as many as 1.4 million peptidoglycan strands within a single doubling time (i.e., generation) of E. coli.

  DOI：

  10.1021/jo035397e
• 作为产物：
  描述：

  2,3-二甲基马来酸酐 在 咪唑 、 三氟甲磺酸 、 sodium methylate 、 乙酸肼 、 对甲苯磺酸 作用下， 反应 2.0h， 生成 tert-butyl(dimethyl)silyl 3-O-benzyl-4,6-O-benzylidene-2-dimethylmaleimido-2-deoxy-β-D-glucopyranoside
  参考文献：
  名称：

  Synthesis of a Fragment of Bacterial Cell Wall

  摘要：

  Cell wall is indispensable for survival of bacteria. This large molecular "mesh" encases the entire cytoplasm of bacteria, and it is comprised of repeating backbone units of N-acetyl-glucosamine (NAG)-N-acetyl-muramic acid (NAM). A pentapeptide is attached to each of the lactyl units of the N-acetyl-muramic acid. The cell wall has both cross-linked and non-cross-linked components. In the present paper, we have devised a synthetic route for the preparation of a fragment of the cell wall comprised of a tetrasaccharide (NAG-NAM-NAG-NAM), along with the two appended peptides. We also report the syntheses of three glycosyl donors (compounds 5, 7, and 9) and three glycosyl acceptors (compounds 4, 6, and 8) based on the D-glucosamine structure as a building unit. The synthetic strategy that is disclosed is generally useful in construction of other natural products containing the D-glucosamine as a building block.

  DOI：

  10.1021/jo035583k

文献信息

• Synthesis of a Fragment of Bacterial Cell Wall
  作者：Dusan Hesek、Mijoon Lee、Ken-ichiro Morio、Shahriar Mobashery

  DOI：10.1021/jo035583k

  日期：2004.3.1

  Cell wall is indispensable for survival of bacteria. This large molecular "mesh" encases the entire cytoplasm of bacteria, and it is comprised of repeating backbone units of N-acetyl-glucosamine (NAG)-N-acetyl-muramic acid (NAM). A pentapeptide is attached to each of the lactyl units of the N-acetyl-muramic acid. The cell wall has both cross-linked and non-cross-linked components. In the present paper, we have devised a synthetic route for the preparation of a fragment of the cell wall comprised of a tetrasaccharide (NAG-NAM-NAG-NAM), along with the two appended peptides. We also report the syntheses of three glycosyl donors (compounds 5, 7, and 9) and three glycosyl acceptors (compounds 4, 6, and 8) based on the D-glucosamine structure as a building unit. The synthetic strategy that is disclosed is generally useful in construction of other natural products containing the D-glucosamine as a building block.
• Synthetic Peptidoglycan Substrates for Penicillin-Binding Protein 5 of Gram-Negative Bacteria
  作者：Dusan Hesek、Maxim Suvorov、Ken-ichiro Morio、Mijoon Lee、Stephen Brown、Sergei B. Vakulenko、Shahriar Mobashery

  DOI：10.1021/jo035397e

  日期：2004.2.1

  The major constituent of the bacterial cell wall, peptidoglycan, is comprised of repeating units of N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM) with an appended peptide. Penicillin-binding proteins (PBPs) are involved in the final stages of bacterial cell wall assembly. Two activities for PBPs are the cross-linking of the cell wall, carried out by DD-transpeptidases, and the DD-peptidase activity, that removes the terminal D-Ala residue from peptidoglycan. The DD-peptidase activity moderates the extent of the cell wall cross-linking. There exists a balance between the two activities that is critical for the well-being of bacterial cells. We have cloned and purified PBP5 of Escherichia coli. The membrane anchor of this protein was removed, and the enzyme was obtained as a soluble protein. Two fragments of the polymeric cell wall of Gram-negative bacteria (compounds 5 and 6) were synthesized. These molecules served as substrates for PBP5. The products of the reactions of PBP5 and compounds 5 and 6 were isolated and were shown to be D-Ala and the fragments of the substrates minus the terminal D-Ala. The kinetic parameters for these enzymic reactions were evaluated. PBP5 would appear to have the potential for turnover of as many as 1.4 million peptidoglycan strands within a single doubling time (i.e., generation) of E. coli.