phenyl 3-O-benzyl-4,6-O-benzylidene-2-deoxy-2-fluoro-1-thio-β-D-glucopyranoside | 931095-33-9

• 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: phenyl 3-O-benzyl-4,6-O-benzylidene-2-deoxy-2-fluoro-1-thio-β-D-glucopyranoside
• 英文别名: (2R,4aR,6S,7R,8S,8aR)-7-fluoro-2-phenyl-8-phenylmethoxy-6-phenylsulfanyl-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxine
• CAS: 931095-33-9
• 化学式: C₂₆H₂₅FO₄S
• 分子量: 452.547
• InChiKey: WRMCPEWYTCIPFQ-JVIQZWCRSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.3
• 重原子数：
  32
• 可旋转键数：
  6
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.31
• 拓扑面积：
  62.2
• 氢给体数：
  0
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  phenyl 3-O-benzyl-4,6-O-benzylidene-2-deoxy-2-fluoro-1-thio-β-D-glucopyranoside 、 三氟乙酸酐 在 sulfobromophthalein sodium 作用下， 以 二氯甲烷-D2 为溶剂， 生成
  参考文献：
  名称：

  4,6-O-Benzylidene-Directed β-Mannopyranosylation and α-Glucopyranosylation:  The 2-Deoxy-2-fluoro and 3-Deoxy-3-fluoro Series of Donors and the Importance of the O2−C2−C3−O3 Interaction

  摘要：

  A series of 4,6-O-benzylidene-protected 2-O-benzyl-3-deoxy-3-fluoro- and 3-O-benzyl-2-deoxy-2-fluorogluco- and mannopyranosyl thioglycosides were synthesized and their coupling reactions with a series of alcohols, on preactivation with 1-benzenesulfinylpiperidine and trifluoromethanesulfonic anhydride, investigated. In all cases, the selectivities were lower than those observed with the corresponding simple 4,6-O-benzylidene 2,3-di-O-benzylgluco- and mannopyranosyl thioglycosides. This leads to the conclusion that the high beta-selectivity observed with 4,6-O-benzylidene 2,3-di-O-benzylmannopyranosyl donors under the same conditions is in large part derived from the compression of the O2-C2-C3-O3 torsion angle on going from the intermediate covalent glycosyl triflate to the oxacarbenium ion, as compared to the relaxation of this torsion angle in the gluco series.

  DOI：

  10.1021/jo062294y
• 作为产物：
  描述：

  S-phenyl 3-O-benzyl-4,6-O-benzylidene-β-D-thiomannopyranoside 在 4,4'-二氨基二苯乙烯-2,2'-二磺酸 作用下， 以 二氯甲烷 为溶剂， 反应 6.0h， 以62%的产率得到phenyl 3-O-benzyl-4,6-O-benzylidene-2-deoxy-2-fluoro-1-thio-β-D-glucopyranoside
  参考文献：
  名称：

  4,6-O-Benzylidene-Directed β-Mannopyranosylation and α-Glucopyranosylation:  The 2-Deoxy-2-fluoro and 3-Deoxy-3-fluoro Series of Donors and the Importance of the O2−C2−C3−O3 Interaction

  摘要：

  A series of 4,6-O-benzylidene-protected 2-O-benzyl-3-deoxy-3-fluoro- and 3-O-benzyl-2-deoxy-2-fluorogluco- and mannopyranosyl thioglycosides were synthesized and their coupling reactions with a series of alcohols, on preactivation with 1-benzenesulfinylpiperidine and trifluoromethanesulfonic anhydride, investigated. In all cases, the selectivities were lower than those observed with the corresponding simple 4,6-O-benzylidene 2,3-di-O-benzylgluco- and mannopyranosyl thioglycosides. This leads to the conclusion that the high beta-selectivity observed with 4,6-O-benzylidene 2,3-di-O-benzylmannopyranosyl donors under the same conditions is in large part derived from the compression of the O2-C2-C3-O3 torsion angle on going from the intermediate covalent glycosyl triflate to the oxacarbenium ion, as compared to the relaxation of this torsion angle in the gluco series.

  DOI：

  10.1021/jo062294y