4-methylphenyl 2-O-acetyl-4-azido-6-O-benzyl-4-deoxy-3-O-(methoxyethanoyl)-1-thio-β-D-galactopyranoside | 219518-38-4

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 4-methylphenyl 2-O-acetyl-4-azido-6-O-benzyl-4-deoxy-3-O-(methoxyethanoyl)-1-thio-β-D-galactopyranoside
• 英文别名: methyl 2-[(2S,3R,4S,5S,6S)-3-acetyloxy-5-azido-2-(4-methylphenyl)sulfanyl-6-(phenylmethoxymethyl)oxan-4-yl]oxyacetate
• CAS: 219518-38-4
• 化学式: C₂₅H₂₉N₃O₇S
• 分子量: 515.587
• InChiKey: CSGLZVFWSWYVNA-MASZLTEFSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.7
• 重原子数：
  36
• 可旋转键数：
  13
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.44
• 拓扑面积：
  120
• 氢给体数：
  0
• 氢受体数：
  10

反应信息

• 作为反应物：
  描述：

  4-methylphenyl 2-O-acetyl-4-azido-6-O-benzyl-4-deoxy-3-O-(methoxyethanoyl)-1-thio-β-D-galactopyranoside 在 甲磺酰溴 、 硫化氢 、 silver trifluoromethanesulfonate 、 乙二胺 、 三乙胺 作用下， 以 甲醇 、 乙醇 、 水 为溶剂， 反应 33.58h， 生成 4-methylphenyl (2-O-acetyl-4-amino-6-O-benzyl-4-deoxy-4,3-N,O-(2-oxoethylidene)-β-D-galactopyranosyl>-(1->4)-<2,3,4-tri-O-benzoyl-α-L-fucopyranosyl>-(1->3)-(2-acetamido-6-O-benzyl-2-deoxy-β-D-glucopyranoside)
  参考文献：
  名称：

  Synthesis of Lactam and Acetamido Analogues of Sialyl Lewis x Tetrasaccharide and Lewis x Trisaccharide

  摘要：

  Virtually complete regioselective galactosylation of the diol acceptor p-methoxyphenyl 6-O-benzyl-2-deoxy-2-tetrachlorophthalimido-beta-D-glucopyranoside (15) with the donors ethyl 3,4-di-O-acetyl-6-O-benzyl-2-deoxy-2-[[(2,2,2-trichloroethoxy)carbonyl]amino]-1-beta-D-galactopyranoside (14), 4-methylphenyl 2,3-di-O-acetyl-4-azido-6-O-benzyl-4-deoxy-1-thio-beta-D-galactopyranoside (30), and 4-methylphenyl 2-O-acetyl-4-azido-6-O-benzyl-4-deoxy-3-O-(methoxyethanoyl)-1-thio-beta-D-galactopyranoside (44) gave the lactose-diamine derivatives 16, 33, and 45, respectively. Fucosylation of the NHAc derivatives of 16 and 33 (17 and 34) with the donor 18 gave, after deprotection and N-acetylation, the 2-NHAc-Le(x) and 4-NKAc-Le(x) trisaccharides 3 and 5, respectively. Removal of the Troc group from the tetrasaccharide intermediate 23, followed by N-acetylation (-->24), gave the NHAc-SLe(x) tetrasaccharide 2. Regioselective sialylation of the partially protected trisaccharide diols 21 and 37 with the sialyl donors 22 and 38 gave, after deprotection and lactamization, the SLe(x)-1'''-->2-lactam 1 and the SLe(x)-1'''-->4'-lactam 4, respectively. The stannylidene acetal of the trisaccharide diol 21 was regioselectively 3-O-alkylated with tert-butyl bromoacetate; reductive removal of the Tree protecting group and addition of methanolic MeONa caused formation of a lactam ring. Compound 40 was thus obtained over four steps in an overall yield of 52%. Deprotection of 40 furnished the Le(x)-3,2-lactam 6 in 74% yield. Fucosylation of the lactose-diamine derivative 46 with donor 18 gave the N-3-Le(x) trisaccharide derivative 47. The azido function of 47 was reduced with H2S, which caused spontaneous closure of a lactam ring. Removal of the protecting groups then gave the Le(x)-3,4-lactam 7. The total yields of 1, 2, 3, 4, 5, and 7 from the monosaccharide starting materials 14, 15, 18, 22, 30, 38, and 44 were 10%, 10%, 22%, 14%, 62%, and 28%, respectively.

  DOI：

  10.1021/jo981204p
• 作为产物：
  描述：

  4-methylphenyl 4,6-O-benzylidene-1-thio-β-D-glucopyranoside 在 吡啶 、 盐酸 、 4-二甲氨基吡啶 、 sodium azide 、 4 Angstroems MS 、 sodium cyanoborohydride 作用下， 以 四氢呋喃 、 吡啶 、 乙醚 、 二氯甲烷 、 N,N-二甲基甲酰胺 为溶剂， 反应 20.17h， 生成 4-methylphenyl 2-O-acetyl-4-azido-6-O-benzyl-4-deoxy-3-O-(methoxyethanoyl)-1-thio-β-D-galactopyranoside
  参考文献：
  名称：

  Synthesis of Lactam and Acetamido Analogues of Sialyl Lewis x Tetrasaccharide and Lewis x Trisaccharide

  摘要：

  Virtually complete regioselective galactosylation of the diol acceptor p-methoxyphenyl 6-O-benzyl-2-deoxy-2-tetrachlorophthalimido-beta-D-glucopyranoside (15) with the donors ethyl 3,4-di-O-acetyl-6-O-benzyl-2-deoxy-2-[[(2,2,2-trichloroethoxy)carbonyl]amino]-1-beta-D-galactopyranoside (14), 4-methylphenyl 2,3-di-O-acetyl-4-azido-6-O-benzyl-4-deoxy-1-thio-beta-D-galactopyranoside (30), and 4-methylphenyl 2-O-acetyl-4-azido-6-O-benzyl-4-deoxy-3-O-(methoxyethanoyl)-1-thio-beta-D-galactopyranoside (44) gave the lactose-diamine derivatives 16, 33, and 45, respectively. Fucosylation of the NHAc derivatives of 16 and 33 (17 and 34) with the donor 18 gave, after deprotection and N-acetylation, the 2-NHAc-Le(x) and 4-NKAc-Le(x) trisaccharides 3 and 5, respectively. Removal of the Troc group from the tetrasaccharide intermediate 23, followed by N-acetylation (-->24), gave the NHAc-SLe(x) tetrasaccharide 2. Regioselective sialylation of the partially protected trisaccharide diols 21 and 37 with the sialyl donors 22 and 38 gave, after deprotection and lactamization, the SLe(x)-1'''-->2-lactam 1 and the SLe(x)-1'''-->4'-lactam 4, respectively. The stannylidene acetal of the trisaccharide diol 21 was regioselectively 3-O-alkylated with tert-butyl bromoacetate; reductive removal of the Tree protecting group and addition of methanolic MeONa caused formation of a lactam ring. Compound 40 was thus obtained over four steps in an overall yield of 52%. Deprotection of 40 furnished the Le(x)-3,2-lactam 6 in 74% yield. Fucosylation of the lactose-diamine derivative 46 with donor 18 gave the N-3-Le(x) trisaccharide derivative 47. The azido function of 47 was reduced with H2S, which caused spontaneous closure of a lactam ring. Removal of the protecting groups then gave the Le(x)-3,4-lactam 7. The total yields of 1, 2, 3, 4, 5, and 7 from the monosaccharide starting materials 14, 15, 18, 22, 30, 38, and 44 were 10%, 10%, 22%, 14%, 62%, and 28%, respectively.

  DOI：

  10.1021/jo981204p