methyl (methyl 2,3-di-O-benzyl-4-O-p-methoxybenzyl-α-D-galactopyranosyluronate)-(1->4)-(allyl 2,3-di-O-benzyl-β-D-galactopyranosid)uronate | 311797-27-0

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: methyl (methyl 2,3-di-O-benzyl-4-O-p-methoxybenzyl-α-D-galactopyranosyluronate)-(1->4)-(allyl 2,3-di-O-benzyl-β-D-galactopyranosid)uronate
• 英文别名: methyl (2S,3R,4S,5R,6S)-6-[(2S,3R,4S,5R,6R)-2-methoxycarbonyl-4,5-bis(phenylmethoxy)-6-prop-2-enoxyoxan-3-yl]oxy-3-[(4-methoxyphenyl)methoxy]-4,5-bis(phenylmethoxy)oxane-2-carboxylate
• CAS: 311797-27-0
• 化学式: C₅₃H₅₈O₁₄
• 分子量: 919.035
• InChiKey: ZGAUGHSVBXSCDH-CEZMCDGOSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  7.2
• 重原子数：
  67
• 可旋转键数：
  25
• 环数：
  7.0
• sp3杂化的碳原子比例：
  0.36
• 拓扑面积：
  145
• 氢给体数：
  0
• 氢受体数：
  14

反应信息

• 作为反应物：
  描述：

  methyl (methyl 2,3-di-O-benzyl-4-O-p-methoxybenzyl-α-D-galactopyranosyluronate)-(1->4)-(allyl 2,3-di-O-benzyl-β-D-galactopyranosid)uronate 在 吡啶 、 水 、 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 28.0h， 生成 methyl (methyl 4-O-acetyl-2,3-di-O-benzyl-α-D-galactopyranosyluronate)-(1->4)-(allyl 2,3-di-O-benzyl-β-D-galactopyranosid)uronate
  参考文献：
  名称：

  Synthesis of Homogalacturonan Fragments

  摘要：

  Glycosylation of the D-galacturonic acid ester derivatives 15 and 17, which are prepared directly from D-galacturonic acid, with the thioglycosides 28 and 32, derived from the same sugar, provides alpha(1-->4)-linked dimers. The formation of the glycosidic linkage between the galacturonic acid moieties is best achieved by iodonium di-sym-collidine perchlorate promotion. Thus, the 4'-O-p-methoxybenzyl dimer 38 can be obtained in 64% yield. Partial deprotection of the 4'-O-position provided the glycosyl acceptor 36, which was coupled with the donor 32 to yield the alpha(1 "-->4')-linked trimer 39 (48%). Approximately 8% of the beta(1 "-->4')-coupled isomer was observed in the C-13 NMR spectrum of the reaction mixture.

  DOI：

  10.1080/07328300008544125
• 作为产物：
  描述：

  1-硫代-Β-D-乙基半乳糖苷 在 重铬酸吡啶 、 三甲基氯硅烷 、 iodonium(di-γ-collidine) perchlorate 、 sodium hydride 、 sodium cyanoborohydride 、 对甲苯磺酸 、 二甲基亚砜 、 N,N'-二环己基碳二亚胺 作用下， 以 乙醚 、 二氯甲烷 、 N,N-二甲基甲酰胺 、 乙腈 为溶剂， 40.0 ℃ 、4.0 kPa 条件下， 反应 54.42h， 生成 methyl (methyl 2,3-di-O-benzyl-4-O-p-methoxybenzyl-α-D-galactopyranosyluronate)-(1->4)-(allyl 2,3-di-O-benzyl-β-D-galactopyranosid)uronate
  参考文献：
  名称：

  Synthesis of Homogalacturonan Fragments

  摘要：

  Glycosylation of the D-galacturonic acid ester derivatives 15 and 17, which are prepared directly from D-galacturonic acid, with the thioglycosides 28 and 32, derived from the same sugar, provides alpha(1-->4)-linked dimers. The formation of the glycosidic linkage between the galacturonic acid moieties is best achieved by iodonium di-sym-collidine perchlorate promotion. Thus, the 4'-O-p-methoxybenzyl dimer 38 can be obtained in 64% yield. Partial deprotection of the 4'-O-position provided the glycosyl acceptor 36, which was coupled with the donor 32 to yield the alpha(1 "-->4')-linked trimer 39 (48%). Approximately 8% of the beta(1 "-->4')-coupled isomer was observed in the C-13 NMR spectrum of the reaction mixture.

  DOI：

  10.1080/07328300008544125