benzyl (2R,3S,4R,5S,6R)-5-acetamido-2-methylsulfanyl-4-phenylmethoxy-3-phenylsulfanyl-6-[(1S,2R)-1,2,3-tris(phenylmethoxy)propyl]oxane-2-carboxylate | 187330-08-1

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: benzyl (2R,3S,4R,5S,6R)-5-acetamido-2-methylsulfanyl-4-phenylmethoxy-3-phenylsulfanyl-6-[(1S,2R)-1,2,3-tris(phenylmethoxy)propyl]oxane-2-carboxylate
• CAS: 187330-08-1
• 化学式: C₅₃H₅₅NO₈S₂
• 分子量: 898.154
• InChiKey: MRXVHWSCFPDEIQ-CPSJNMJYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  9.2
• 重原子数：
  64
• 可旋转键数：
  23
• 环数：
  7.0
• sp3杂化的碳原子比例：
  0.28
• 拓扑面积：
  152
• 氢给体数：
  1
• 氢受体数：
  10

反应信息

• 作为反应物：
  描述：

  甲基2,3,4-三-O-苄基-α-D-吡喃葡萄糖苷 、 benzyl (2R,3S,4R,5S,6R)-5-acetamido-2-methylsulfanyl-4-phenylmethoxy-3-phenylsulfanyl-6-[(1S,2R)-1,2,3-tris(phenylmethoxy)propyl]oxane-2-carboxylate 在 N-碘代丁二酰亚胺 、 三氟甲磺酸 、 4 A molecular sieve 作用下， 以 乙腈 为溶剂， 以80%的产率得到
  参考文献：
  名称：

  A new strategy for stereoselective synthesis of sialic acid-containing glycopeptide fragment

  摘要：

  Sialic acid donor 5, which has a thiophenyl group as a stereocontrolling auxiliary and thiomethyl group as a leaving group was prepared and subjected to model glycosylation. Reactions with acceptor substrates 6, 7, and 8 gave coupled products 9b, 10b, and 11b, respectively, in a higher efficiency than previously observed for the bromide la. This reaction was further applied to the synthesis of protected glyco-amino acid fragment 12, that is strategically designed for the synthesis of sialic acid containing glycopeptides. Copyright (C) 1996 Elsevier Science Ltd

  DOI：

  10.1016/s0968-0896(96)00172-1
• 作为产物：
  描述：

  5-acetamido-4,7,8,9-tetra-O-benzyl-2,3-dehydro-3,5-dideoxy-D-glycero-D-galacto-2-nonulopyranosonic acid 在 吡啶 、 4-二甲氨基吡啶 、 potassium fluoride 、 三氟甲磺酸三甲基硅酯 、 4 A molecular sieve 作用下， 以 二氯甲烷 、 1,2-二氯乙烷 、 N,N-二甲基甲酰胺 、 乙腈 为溶剂， 反应 2.5h， 生成 benzyl (2R,3S,4R,5S,6R)-5-acetamido-2-methylsulfanyl-4-phenylmethoxy-3-phenylsulfanyl-6-[(1S,2R)-1,2,3-tris(phenylmethoxy)propyl]oxane-2-carboxylate
  参考文献：
  名称：

  A new strategy for stereoselective synthesis of sialic acid-containing glycopeptide fragment

  摘要：

  Sialic acid donor 5, which has a thiophenyl group as a stereocontrolling auxiliary and thiomethyl group as a leaving group was prepared and subjected to model glycosylation. Reactions with acceptor substrates 6, 7, and 8 gave coupled products 9b, 10b, and 11b, respectively, in a higher efficiency than previously observed for the bromide la. This reaction was further applied to the synthesis of protected glyco-amino acid fragment 12, that is strategically designed for the synthesis of sialic acid containing glycopeptides. Copyright (C) 1996 Elsevier Science Ltd

  DOI：

  10.1016/s0968-0896(96)00172-1

文献信息

• The first total synthesis of the core class II disialylated hexasaccharide as a building block for glycopeptide synthesis
  作者：Latika Singh、Yuko Nakahara、Yukishige Ito、Yoshiaki Nakahara

  DOI：10.1016/s0040-4039(99)00605-x

  日期：1999.5

  The first total synthesis of the protected core class II sialylated glycosyl-Thr hexasaccharide (3), utilizing suitably protected building blocks 4, 5, 7 and 8 was accomplished. (C) 1999 Elsevier Science Ltd. All rights reserved.
• An efficient access to protected disialylated glycohexaosyl threonine present on the leukosialin of activated T-lymphocytes
  作者：Latika Singh、Yuko Nakahara、Yukishige Ito、Yoshiaki Nakahara

  DOI：10.1016/s0008-6215(99)00313-4

  日期：2000.4

  The total synthesis of the threonine-linked core 2 class disialylated hexasaccharide in a completely protected form was accomplished for the first time. The L-threonine conjugate, N-(9-fluorenylmethoxycarbonyl)-O-(5-acetomido-4,7,8,9-tetra-O-benzyl-3,5-dideoxy-D-glycero-alpha-D-galacto-2-nonulopyranosylanic acid)-(2 --> 3)-(2,6-di-O-benzyl-beta-D-galactopyranosyl)-(1 --> 4)-2-acetamido-2-deoxy-3,6-di-O-benzyl-beta-D-glucopyranosyl-(1 --> 6)-[(5-acctamido-4,7,8,9-tetra-O-benzyl-3, 5-dideoxy-D-glycero-alpha-D-galacto-2-nonulopyranosylonic acid)-(2 --> 3)-2,6-di-O-benzyl-beta-D-galactopyranosyl-(1 --> 3)]-2-acetamido-2-deoxy-alpha-D-galactopyranosyl-(1d --> 4c:1f --> 4e)-dilactone}-L-threonine allyl ester was synthesized via stereocontrolled glycosylations employing readily accessible monosaccharidic blocks; t-butyl-diphenylsilyl-2-azido-2-deoxy-3, 6-di-O-benzyl-beta-D-glucopyranose, N-(9-fluorenylmethoxycarbonyl)-O-(2-azir-butylditnethylsilyl-2-deoxy-alpha-D-galactopyranosyl)-L-threonine allyl ester, 8, 9 and N-(9-fluorenylmethoxycarbonyl)-O-(2-azido-4,6-O-benzylidene-3-O-chloroacetyl-2-deoxy-alpha-D-galactopyranosy;)-L-threonine allyl ester. For the introduction of the amino acid. the azide group was used to temporarily mask the amino group of GalNAc so as to obtain an alpha-glycosidic linkage without participation from the C-2 substituent. The threonine was attached to the sugar unit at the monosaccharide stage to avoid loss of oligosaccharide at a later stage. The Fmoc and allyl ester protected amino acid at the reducing end facilitates efficient glycopeptide synthesis on solid-phase support. (C) 2000 Elsevier Science Ltd. All rights reserved.
• A new strategy for stereoselective synthesis of sialic acid-containing glycopeptide fragment
  作者：Zhi-Guang Wang、Xu-Fang Zhang、Yukishige Ito、Yoshiaki Nakahara、Tomoya Ogawa

  DOI：10.1016/s0968-0896(96)00172-1

  日期：1996.11

  Sialic acid donor 5, which has a thiophenyl group as a stereocontrolling auxiliary and thiomethyl group as a leaving group was prepared and subjected to model glycosylation. Reactions with acceptor substrates 6, 7, and 8 gave coupled products 9b, 10b, and 11b, respectively, in a higher efficiency than previously observed for the bromide la. This reaction was further applied to the synthesis of protected glyco-amino acid fragment 12, that is strategically designed for the synthesis of sialic acid containing glycopeptides. Copyright (C) 1996 Elsevier Science Ltd