methyl (2R,4S,5R,6R)-5-acetamido-2-[[(2R,3R,4R,5R,6S)-5-acetamido-6-[(2R,3S,4S,5R,6S)-6-[(2R,3R,4S,5R,6R)-4,5-bis(phenylmethoxy)-2-(phenylmethoxymethyl)-6-(2-trimethylsilylethoxy)oxan-3-yl]oxy-4,5-bis(phenylmethoxy)-2-(phenylmethoxymethyl)oxan-3-yl]oxy-3,4-dihydroxyoxan-2-yl]methoxy]-4-acetyloxy-6-[(1S,2R)-1,2,3-triacetyloxypropyl]oxane-2-carboxylate | 362614-15-1

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: methyl (2R,4S,5R,6R)-5-acetamido-2-[[(2R,3R,4R,5R,6S)-5-acetamido-6-[(2R,3S,4S,5R,6S)-6-[(2R,3R,4S,5R,6R)-4,5-bis(phenylmethoxy)-2-(phenylmethoxymethyl)-6-(2-trimethylsilylethoxy)oxan-3-yl]oxy-4,5-bis(phenylmethoxy)-2-(phenylmethoxymethyl)oxan-3-yl]oxy-3,4-dihydroxyoxan-2-yl]methoxy]-4-acetyloxy-6-[(1S,2R)-1,2,3-triacetyloxypropyl]oxane-2-carboxylate
• CAS: 362614-15-1
• 化学式: C₈₇H₁₁₀N₂O₂₈Si
• 分子量: 1659.91
• InChiKey: JLQJPNROJFEIQE-QTTQHZEBSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  7.83
• 重原子数：
  118
• 可旋转键数：
  46
• 环数：
  10.0
• sp3杂化的碳原子比例：
  0.51
• 拓扑面积：
  359
• 氢给体数：
  4
• 氢受体数：
  28

反应信息

• 作为反应物：
  描述：

  methyl O-(methyl 5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-D-glycero-α-D-galacto-2-nonulopyranosylonate)-(2->3)-2,4,6-tri-O-benzoyl-1-thio-β-D-galactopyranoside 、 methyl (2R,4S,5R,6R)-5-acetamido-2-[[(2R,3R,4R,5R,6S)-5-acetamido-6-[(2R,3S,4S,5R,6S)-6-[(2R,3R,4S,5R,6R)-4,5-bis(phenylmethoxy)-2-(phenylmethoxymethyl)-6-(2-trimethylsilylethoxy)oxan-3-yl]oxy-4,5-bis(phenylmethoxy)-2-(phenylmethoxymethyl)oxan-3-yl]oxy-3,4-dihydroxyoxan-2-yl]methoxy]-4-acetyloxy-6-[(1S,2R)-1,2,3-triacetyloxypropyl]oxane-2-carboxylate 在 4 A molecular sieve 、 DMTST 作用下， 以 二氯甲烷 为溶剂， 反应 24.0h， 以86%的产率得到methyl (2R,4S,5R,6R)-5-acetamido-2-[[(2R,3R,4R,5R,6S)-5-acetamido-4-[(2R,3R,4S,5S,6R)-4-[(2S,4S,5R,6R)-5-acetamido-4-acetyloxy-2-methoxycarbonyl-6-[(1S,2R)-1,2,3-triacetyloxypropyl]oxan-2-yl]oxy-3,5-dibenzoyloxy-6-(benzoyloxymethyl)oxan-2-yl]oxy-6-[(2R,3S,4S,5R,6S)-6-[(2R,3R,4S,5R,6R)-4,5-bis(phenylmethoxy)-2-(phenylmethoxymethyl)-6-(2-trimethylsilylethoxy)oxan-3-yl]oxy-4,5-bis(phenylmethoxy)-2-(phenylmethoxymethyl)oxan-3-yl]oxy-3-hydroxyoxan-2-yl]methoxy]-4-acetyloxy-6-[(1S,2R)-1,2,3-triacetyloxypropyl]oxane-2-carboxylate
  参考文献：
  名称：

  A HIGHLY EFFICIENT TOTAL SYNTHETIC ROUTE TO α-SERIES GANGLIOSIDES: GM1α, GD1α, AND GT1α1-2

  摘要：

  A highly efficient total synthetic route to alpha -series gangliosides GM1 alpha, GD1 alpha and GT1 alpha is described. The suitably protected gangliotriose (GgOse3) derivatives, i.e., 2-(trimethylsilyl)ethyl (2-acetamido-2-deoxy-3-O-p-methoxybenzyl-beta -D-galactopyranosyl)-(1-->4)-(2,3,6-tri-O-benzyl-beta -D-galactopyranosyl)-(1 -->4)-2,3,6-tri-O-benzyl-beta -D-glucopyranoside (8) and the corresponding III3-levulinoyl derivative (9), were regioselectively glycosylated with the phenyl 2-thioglycoside of N-acetylneuraminic acid (Neu5Ac) promoted by N-iodosuccinimide (NIS)-trimethylsilyl trifluoromethanesulfonate (TMSOTf) or trifluoromethanesulfonic acid (TfOH) in acetonitrile, to give the desired alpha -Neu5Ac-(2-->6)-gangliotriose (III(6)Neu5AcGgOse3) derivatives as the major products (11 and 12). The p-methoxybenzyl (MPM) group in 11 or the levulinoyl group in 12 was selectively removed, and the resulting 2-(trimethylsilyl)ethyl (methyl 5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-D-glycero-alpha -D-galacto-2-nonulopyranosylonate)-(2-->6)-(2-acetamido-2-deoxy-beta -D-galactopyranosyl)-(1-->4)-(2,3,6-tri-O-benzyl-beta -D-galactopyranosyl)-(1-->4)-2,3,6-tri-O-benzyl-beta -D-glucopyranoside (13), a key glycosyl acceptor, was systematically glycosylated with the galactose donor (14), alpha -Neu5Ac-(2-->3)-galactuse donor (15) and alpha -Neu5Ac-(2-->8)-alpha -Neu5Ac-(2-->3)-galactose donor (20) to give the protected GM1 alpha (16, 70%), GD1 alpha (17, 80%) and GT1 alpha (21, 87%) oligosaccharides, respectively, which can be converted to the target gangliosides by the introduction of ceramide and then complete deprotection.

  DOI：

  10.1081/car-100103959
• 作为产物：
  描述：

  在 ammonium cerium(IV) nitrate 作用下， 以 水 、 乙酸乙酯 为溶剂， 反应 3.0h， 以95%的产率得到methyl (2R,4S,5R,6R)-5-acetamido-2-[[(2R,3R,4R,5R,6S)-5-acetamido-6-[(2R,3S,4S,5R,6S)-6-[(2R,3R,4S,5R,6R)-4,5-bis(phenylmethoxy)-2-(phenylmethoxymethyl)-6-(2-trimethylsilylethoxy)oxan-3-yl]oxy-4,5-bis(phenylmethoxy)-2-(phenylmethoxymethyl)oxan-3-yl]oxy-3,4-dihydroxyoxan-2-yl]methoxy]-4-acetyloxy-6-[(1S,2R)-1,2,3-triacetyloxypropyl]oxane-2-carboxylate
  参考文献：
  名称：

  A HIGHLY EFFICIENT TOTAL SYNTHETIC ROUTE TO α-SERIES GANGLIOSIDES: GM1α, GD1α, AND GT1α1-2

  摘要：

  A highly efficient total synthetic route to alpha -series gangliosides GM1 alpha, GD1 alpha and GT1 alpha is described. The suitably protected gangliotriose (GgOse3) derivatives, i.e., 2-(trimethylsilyl)ethyl (2-acetamido-2-deoxy-3-O-p-methoxybenzyl-beta -D-galactopyranosyl)-(1-->4)-(2,3,6-tri-O-benzyl-beta -D-galactopyranosyl)-(1 -->4)-2,3,6-tri-O-benzyl-beta -D-glucopyranoside (8) and the corresponding III3-levulinoyl derivative (9), were regioselectively glycosylated with the phenyl 2-thioglycoside of N-acetylneuraminic acid (Neu5Ac) promoted by N-iodosuccinimide (NIS)-trimethylsilyl trifluoromethanesulfonate (TMSOTf) or trifluoromethanesulfonic acid (TfOH) in acetonitrile, to give the desired alpha -Neu5Ac-(2-->6)-gangliotriose (III(6)Neu5AcGgOse3) derivatives as the major products (11 and 12). The p-methoxybenzyl (MPM) group in 11 or the levulinoyl group in 12 was selectively removed, and the resulting 2-(trimethylsilyl)ethyl (methyl 5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-D-glycero-alpha -D-galacto-2-nonulopyranosylonate)-(2-->6)-(2-acetamido-2-deoxy-beta -D-galactopyranosyl)-(1-->4)-(2,3,6-tri-O-benzyl-beta -D-galactopyranosyl)-(1-->4)-2,3,6-tri-O-benzyl-beta -D-glucopyranoside (13), a key glycosyl acceptor, was systematically glycosylated with the galactose donor (14), alpha -Neu5Ac-(2-->3)-galactuse donor (15) and alpha -Neu5Ac-(2-->8)-alpha -Neu5Ac-(2-->3)-galactose donor (20) to give the protected GM1 alpha (16, 70%), GD1 alpha (17, 80%) and GT1 alpha (21, 87%) oligosaccharides, respectively, which can be converted to the target gangliosides by the introduction of ceramide and then complete deprotection.

  DOI：

  10.1081/car-100103959