2-azidoethyl O-(2,4,6-tri-O-benzoyl-β-D-galactopyranosyl)-(1->4)-2-acetamido-6-O-benzoyl-3-O-benzyl-2-deoxy-β-D-glucopyranoside | 399036-12-5

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 2-azidoethyl O-(2,4,6-tri-O-benzoyl-β-D-galactopyranosyl)-(1->4)-2-acetamido-6-O-benzoyl-3-O-benzyl-2-deoxy-β-D-glucopyranoside
• 英文别名: [(2R,3R,4S,5R,6S)-6-[(2R,3S,4R,5R,6R)-5-acetamido-6-(2-azidoethoxy)-2-(benzoyloxymethyl)-4-phenylmethoxyoxan-3-yl]oxy-3,5-dibenzoyloxy-4-hydroxyoxan-2-yl]methyl benzoate
• CAS: 399036-12-5
• 化学式: C₅₁H₅₀N₄O₁₅
• 分子量: 958.976
• InChiKey: QJWJEZAZBTUVQL-YIVUVJMYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  7.1
• 重原子数：
  70
• 可旋转键数：
  24
• 环数：
  7.0
• sp3杂化的碳原子比例：
  0.31
• 拓扑面积：
  215
• 氢给体数：
  2
• 氢受体数：
  17

反应信息

• 作为反应物：
  描述：

  2-azidoethyl O-(2,4,6-tri-O-benzoyl-β-D-galactopyranosyl)-(1->4)-2-acetamido-6-O-benzoyl-3-O-benzyl-2-deoxy-β-D-glucopyranoside 、 ethyl O-(3-O-acetyl-2,4,6-tri-O-benzoyl-β-D-galactopyranosyl)-(1->4)-3,6-di-O-benzyl-2-deoxy-1-thio-2-trichloroacetamido-β-D-glucopyranoside 在 N-碘代丁二酰亚胺 、 三氟甲磺酸 、 4 A molecular sieve 作用下， 以 二氯甲烷 为溶剂， 反应 3.0h， 以69%的产率得到
  参考文献：
  名称：

  Study of glycosylation with N-trichloroacetyl-d-glucosamine derivatives in the syntheses of the spacer-armed pentasaccharides sialyl lacto-N-neotetraose and sialyl lacto-N-tetraose, their fragments, and analogues

  摘要：

  The syntheses of 2-aminoethyl glycosides of the pentasaccharides Neu5Ac-alpha (2 --> 3)-Gal-beta (3(1 --> 4)-GlcNAc-beta (3(1 --> 3)-Gal-beta (1 --> 4)-Glc and Neu5Ac-alpha (2 --> 3)-Gal-beta (1 --> 3)-GlcNAc-beta (1 --> 3)-Gal-beta (1 --> 4)-Glc, their asialo di-, tri-, and tetrasaccharide fragments, and analogues included a systematic study of glycosylation with variously protected mono- and disaccharide donors derived from N-trichloroacetyl-D-glucosamine of galactose, lactose, and lactosamine glycosyl acceptors bearing benzoyl protection around the OH group to be glycosylated. Despite the. low reactivity of these acceptors, stereo specificity and good to excellent yields were obtained with NIS-TfOH-activated thioglycoside donors of such type, or with AgOTf-activated glycosyl bromides, while other promotors, as well as a trichloroacetimidate donor, were less effective, and a beta -acetate donor was inactive. In NIS-TfOH-promoted glycosylation with the thioglycosides, the use of TfOH in catalytic amount led to rapid formation of the corresponding oxazoline, but the quantity of TfOH necessary for further efficient coupling with an acceptor depended on the reactivity of the donor, varying from 0.07 equiv for a 3,6-di-O-benzylated monosaccharide derivative to 2.1 equiv for a peracetylated disaccharide one. In the glycosylation products, the N-trichloroacetyl group was easily converted into N-acetyl by alkaline hydrolysis followed by N-acetylation. (C) 2001 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0008-6215(01)00213-0
• 作为产物：
  描述：

  原苯甲酸三乙酯 在 吡啶 、 甲醇 、 sodium azide 、 18-冠醚-6 、 4 A molecular sieve 、 硫酸 、 D(+)-10-樟脑磺酸 、 氢溴酸 、 silver trifluoromethanesulfonate 、 臭氧 、 溶剂黄146 、 三乙胺 、 乙酰氯 作用下， 以 甲醇 、 二氯甲烷 、 N,N-二甲基甲酰胺 、 苯 为溶剂， 反应 160.0h， 生成 2-azidoethyl O-(2,4,6-tri-O-benzoyl-β-D-galactopyranosyl)-(1->4)-2-acetamido-6-O-benzoyl-3-O-benzyl-2-deoxy-β-D-glucopyranoside
  参考文献：
  名称：

  Study of glycosylation with N-trichloroacetyl-d-glucosamine derivatives in the syntheses of the spacer-armed pentasaccharides sialyl lacto-N-neotetraose and sialyl lacto-N-tetraose, their fragments, and analogues

  摘要：

  The syntheses of 2-aminoethyl glycosides of the pentasaccharides Neu5Ac-alpha (2 --> 3)-Gal-beta (3(1 --> 4)-GlcNAc-beta (3(1 --> 3)-Gal-beta (1 --> 4)-Glc and Neu5Ac-alpha (2 --> 3)-Gal-beta (1 --> 3)-GlcNAc-beta (1 --> 3)-Gal-beta (1 --> 4)-Glc, their asialo di-, tri-, and tetrasaccharide fragments, and analogues included a systematic study of glycosylation with variously protected mono- and disaccharide donors derived from N-trichloroacetyl-D-glucosamine of galactose, lactose, and lactosamine glycosyl acceptors bearing benzoyl protection around the OH group to be glycosylated. Despite the. low reactivity of these acceptors, stereo specificity and good to excellent yields were obtained with NIS-TfOH-activated thioglycoside donors of such type, or with AgOTf-activated glycosyl bromides, while other promotors, as well as a trichloroacetimidate donor, were less effective, and a beta -acetate donor was inactive. In NIS-TfOH-promoted glycosylation with the thioglycosides, the use of TfOH in catalytic amount led to rapid formation of the corresponding oxazoline, but the quantity of TfOH necessary for further efficient coupling with an acceptor depended on the reactivity of the donor, varying from 0.07 equiv for a 3,6-di-O-benzylated monosaccharide derivative to 2.1 equiv for a peracetylated disaccharide one. In the glycosylation products, the N-trichloroacetyl group was easily converted into N-acetyl by alkaline hydrolysis followed by N-acetylation. (C) 2001 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0008-6215(01)00213-0

文献信息

• Study of glycosylation with N-trichloroacetyl-d-glucosamine derivatives in the syntheses of the spacer-armed pentasaccharides sialyl lacto-N-neotetraose and sialyl lacto-N-tetraose, their fragments, and analogues
  作者：Andrei A. Sherman、Olga N. Yudina、Yury V. Mironov、Elena V. Sukhova、Alexander S. Shashkov、Vladimir M. Menshov、Nikolay E. Nifantiev

  DOI：10.1016/s0008-6215(01)00213-0

  日期：2001.11

  The syntheses of 2-aminoethyl glycosides of the pentasaccharides Neu5Ac-alpha (2 --> 3)-Gal-beta (3(1 --> 4)-GlcNAc-beta (3(1 --> 3)-Gal-beta (1 --> 4)-Glc and Neu5Ac-alpha (2 --> 3)-Gal-beta (1 --> 3)-GlcNAc-beta (1 --> 3)-Gal-beta (1 --> 4)-Glc, their asialo di-, tri-, and tetrasaccharide fragments, and analogues included a systematic study of glycosylation with variously protected mono- and disaccharide donors derived from N-trichloroacetyl-D-glucosamine of galactose, lactose, and lactosamine glycosyl acceptors bearing benzoyl protection around the OH group to be glycosylated. Despite the. low reactivity of these acceptors, stereo specificity and good to excellent yields were obtained with NIS-TfOH-activated thioglycoside donors of such type, or with AgOTf-activated glycosyl bromides, while other promotors, as well as a trichloroacetimidate donor, were less effective, and a beta -acetate donor was inactive. In NIS-TfOH-promoted glycosylation with the thioglycosides, the use of TfOH in catalytic amount led to rapid formation of the corresponding oxazoline, but the quantity of TfOH necessary for further efficient coupling with an acceptor depended on the reactivity of the donor, varying from 0.07 equiv for a 3,6-di-O-benzylated monosaccharide derivative to 2.1 equiv for a peracetylated disaccharide one. In the glycosylation products, the N-trichloroacetyl group was easily converted into N-acetyl by alkaline hydrolysis followed by N-acetylation. (C) 2001 Elsevier Science Ltd. All rights reserved.