phenyl 2,3-di-O-benzyl-4,6-O-(p-methoxybenzylidene)-D-glycero-α-D-thio-manno-heptopyranoside | 902751-06-8

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: phenyl 2,3-di-O-benzyl-4,6-O-(p-methoxybenzylidene)-D-glycero-α-D-thio-manno-heptopyranoside
• CAS: 902751-06-8
• 化学式: C₃₅H₃₆O₇S
• 分子量: 600.733
• InChiKey: NVINQZHNUWFBED-XPLKXQJWSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.16
• 重原子数：
  43.0
• 可旋转键数：
  11.0
• 环数：
  6.0
• sp3杂化的碳原子比例：
  0.31
• 拓扑面积：
  75.61
• 氢给体数：
  1.0
• 氢受体数：
  8.0

反应信息

• 作为反应物：
  描述：

  phenyl 2,3-di-O-benzyl-4,6-O-(p-methoxybenzylidene)-D-glycero-α-D-thio-manno-heptopyranoside 在 咪唑 、 1-(苯基亚硫酰基)哌啶 、 三氟甲磺酸酐 、 2,4,6-三叔丁基嘧啶 作用下， 以 二氯甲烷 为溶剂， 反应 3.33h， 生成 methyl 2,3-di-O-benzyl-4,6-O-(p-methoxybenzylidene)-7-O-(t-butyldiphenylsilyl)-D-glycero-β-D-manno-heptopyranosyl-(1->4)-2,3-O-isopropylidene-α-L-rhamnopyranoside
  参考文献：
  名称：

  Stereocontrolled Synthesis of the d- and l-glycero-β-d-manno-Heptopyranosides and Their 6-Deoxy Analogues. Synthesis of Methyl α-l-Rhamno-pyranosyl-(1→3)-d-glycero-β-d-manno-heptopyranosyl- (1→3)-6-deoxy-glycero-β-d-manno-heptopyranosyl-(1→4)-α-l- rhamno-pyranoside, a Tetrasaccharide Subunit of the Lipopolysaccharide from Plesimonas shigelloides

  摘要：

  The synthesis of D-and L-glycero-alpha-manno-thioheptopyranosides, protected with 4,6-O-alkylidenetype acetals is described. In glycosylations carried out with preactivation with the 1-benzenesulfinylpiperidine/trifluoromethanesulfonic anhydride couple, both the D-and L-glycero series exhibit excellent, beta-selectivity with a range of glycosyl acceptors. In contrast, a 4,7-O-alkylidene acetal was found not to afford, beta-selectivity. With a 4,6-O-[1-cyano-2-(2-iodophenyl) ethylidene] acetal protected thioglycoside, excellent, beta-selectivity was obtained in glycosylation reactions, and subsequent treatment with tributyltin hydride and azoisobutyronitrile brought about clean fragmentation to the 6-deoxy-glycero-beta-D-manno-heptopyranosides. This chemistry was applied to the stereocontrolled synthesis of methyl alpha-L-rhamno-pyranosyl-(1 -> 3)-D-glycero-beta- D-manno-heptopyranosyl-(1 -> 3)-6-deoxy-glycero-beta-D-manno-heptopyranosyl-(1 -> 4)-alpha-L-rhamno-pyranoside, a component of the lipopolysaccharide from Plesimonas shigelloides.

  DOI：

  10.1021/ja061594u
• 作为产物：
  描述：

  phenyl 2,3-di-O-benzyl-4,6-O-p-methoxybenzylidene-1-thio-α-D-mannopyranoside 在 四氧化锇 、 草酰氯 、 2-氯-N-(2-氯乙基)-N-甲基乙胺氧化物 、 二异丁基氢化铝 、 二甲基亚砜 、 2,3-二氯-5,6-二氰基-1,4-苯醌 作用下， 以 二氯甲烷 、 水 、 甲苯 、 叔丁醇 为溶剂， 反应 12.0h， 生成 phenyl 2,3-di-O-benzyl-4,6-O-(p-methoxybenzylidene)-D-glycero-α-D-thio-manno-heptopyranoside
  参考文献：
  名称：

  Stereocontrolled Synthesis of the d- and l-glycero-β-d-manno-Heptopyranosides and Their 6-Deoxy Analogues. Synthesis of Methyl α-l-Rhamno-pyranosyl-(1→3)-d-glycero-β-d-manno-heptopyranosyl- (1→3)-6-deoxy-glycero-β-d-manno-heptopyranosyl-(1→4)-α-l- rhamno-pyranoside, a Tetrasaccharide Subunit of the Lipopolysaccharide from Plesimonas shigelloides

  摘要：

  The synthesis of D-and L-glycero-alpha-manno-thioheptopyranosides, protected with 4,6-O-alkylidenetype acetals is described. In glycosylations carried out with preactivation with the 1-benzenesulfinylpiperidine/trifluoromethanesulfonic anhydride couple, both the D-and L-glycero series exhibit excellent, beta-selectivity with a range of glycosyl acceptors. In contrast, a 4,7-O-alkylidene acetal was found not to afford, beta-selectivity. With a 4,6-O-[1-cyano-2-(2-iodophenyl) ethylidene] acetal protected thioglycoside, excellent, beta-selectivity was obtained in glycosylation reactions, and subsequent treatment with tributyltin hydride and azoisobutyronitrile brought about clean fragmentation to the 6-deoxy-glycero-beta-D-manno-heptopyranosides. This chemistry was applied to the stereocontrolled synthesis of methyl alpha-L-rhamno-pyranosyl-(1 -> 3)-D-glycero-beta- D-manno-heptopyranosyl-(1 -> 3)-6-deoxy-glycero-beta-D-manno-heptopyranosyl-(1 -> 4)-alpha-L-rhamno-pyranoside, a component of the lipopolysaccharide from Plesimonas shigelloides.

  DOI：

  10.1021/ja061594u