(2R,3R,4R,5R,6S)-2,3-Bis-allyloxy-5-benzyloxy-6-methyl-tetrahydro-pyran-4-ol | 144174-54-9

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: (2R,3R,4R,5R,6S)-2,3-Bis-allyloxy-5-benzyloxy-6-methyl-tetrahydro-pyran-4-ol
• CAS: 144174-54-9
• 化学式: C₁₉H₂₆O₅
• 分子量: 334.412
• InChiKey: XYXZDAJGDVAMAA-IKLKHMQRSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.45
• 重原子数：
  24.0
• 可旋转键数：
  9.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.47
• 拓扑面积：
  57.15
• 氢给体数：
  1.0
• 氢受体数：
  5.0

反应信息

• 作为反应物：
  描述：

  (2R,3R,4R,5R,6S)-2,3-Bis-allyloxy-5-benzyloxy-6-methyl-tetrahydro-pyran-4-ol 在 4 A molecular sieve 、 sodium 、 氰化汞 、 mercury dibromide 作用下， 以 甲醇 、 二氯甲烷 为溶剂， 生成
  参考文献：
  名称：

  Synthesis of methyl 3--[3--(2,3,4-tri--methyl-α-L-rhamnopyranosyl)-α-L-rhamnopyranosyl]-α-L-rhamnopyranoside : The outer trisaccharide unit of a unique glycopeptidolipid

  摘要：

  The combination of sugars present in Mycobacterium xenopi glycopeptidolipid (GPL X-1) has been characterised as O-(2,3,4-tri-O-methyl-alpha-L-rhamnopyranosyl)-(1-3)-O-(alpha-L-rhamnopyranosyl)-(1-3)-O-(alpha-L-rhamnopyranosyl)-(1-3)-6-deoxy-L-glucose. Two synthetic routes (A and B) towards the outer trisaccharide segment (2) have been designed. Route A involved the condensation of the aglycone (7) with 2,3,4-tri-O-acetyl-alpha-L-rhamnopyranosyl bromide (13) to afford which was sequentially deacetylated, methylated, deallylated and reacetylated to afford 12. Condensation of 12 with 16 in the presence of borontrifluoride etherate was unsuccessful. In route B, the disaccharide 21 was synthesised by the coupling reaction between 16 and 18 in the presence of borontrifluoride-etherate followed by deallylation. Alternatively, the disaccharide triacetate (22) was first prepared and routine modifications on it led to the formation of 21. Final condensation of 21 with the trichloroacetimidate (29) followed by sequential deacetylation, methylation and debenzylation afforded the trisaccharide (2).

  DOI：

  10.1016/s0040-4020(01)80018-1
• 作为产物：
  描述：

  allyl 2-O-allyl-4-O-benzyl-3-O-p-methoxybenzyl-α-L-rhamnopyranoside 在 2,3-二氯-5,6-二氰基-1,4-苯醌 作用下， 以 二氯甲烷 为溶剂， 反应 0.5h， 以83%的产率得到(2R,3R,4R,5R,6S)-2,3-Bis-allyloxy-5-benzyloxy-6-methyl-tetrahydro-pyran-4-ol
  参考文献：
  名称：

  Synthesis of methyl 3--[3--(2,3,4-tri--methyl-α-L-rhamnopyranosyl)-α-L-rhamnopyranosyl]-α-L-rhamnopyranoside : The outer trisaccharide unit of a unique glycopeptidolipid

  摘要：

  The combination of sugars present in Mycobacterium xenopi glycopeptidolipid (GPL X-1) has been characterised as O-(2,3,4-tri-O-methyl-alpha-L-rhamnopyranosyl)-(1-3)-O-(alpha-L-rhamnopyranosyl)-(1-3)-O-(alpha-L-rhamnopyranosyl)-(1-3)-6-deoxy-L-glucose. Two synthetic routes (A and B) towards the outer trisaccharide segment (2) have been designed. Route A involved the condensation of the aglycone (7) with 2,3,4-tri-O-acetyl-alpha-L-rhamnopyranosyl bromide (13) to afford which was sequentially deacetylated, methylated, deallylated and reacetylated to afford 12. Condensation of 12 with 16 in the presence of borontrifluoride etherate was unsuccessful. In route B, the disaccharide 21 was synthesised by the coupling reaction between 16 and 18 in the presence of borontrifluoride-etherate followed by deallylation. Alternatively, the disaccharide triacetate (22) was first prepared and routine modifications on it led to the formation of 21. Final condensation of 21 with the trichloroacetimidate (29) followed by sequential deacetylation, methylation and debenzylation afforded the trisaccharide (2).

  DOI：

  10.1016/s0040-4020(01)80018-1