ethyl 2-O-methyl-1-thio-β-L-fucopyranoside | 146399-61-3

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: ethyl 2-O-methyl-1-thio-β-L-fucopyranoside
• CAS: 146399-61-3
• 化学式: C₉H₁₈O₄S
• 分子量: 222.306
• InChiKey: DHBHGUDBVPRDNL-JTPBWFLFSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.22
• 重原子数：
  14.0
• 可旋转键数：
  3.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  58.92
• 氢给体数：
  2.0
• 氢受体数：
  5.0

反应信息

• 作为反应物：
  描述：

  ethyl 2-O-methyl-1-thio-β-L-fucopyranoside 在 吡啶 、 4-二甲氨基吡啶 、 N-碘代丁二酰亚胺 、 三氟甲磺酸 、 4 A molecular sieve 、 sodium methylate 、 三氟乙酸 作用下， 以 甲醇 、 乙醚 、 二氯甲烷 、 水 为溶剂， 反应 52.0h， 生成 allyl 2-O-methyl-α-L-fucopyranosyl-(1->2)-β-D-galactopyranoside
  参考文献：
  名称：

  SYNTHESIS OF O-METHYLATED DISACCHARIDES RELATED TO EXCRETORY/ SECRETORY ANTIGENS OF TOXOCARA LARVAE1

  摘要：

  The disaccharides 2-O-Me-alpha -L-Fucp-(1 -->2)-beta -D-Galp-(1 --> OAllyl) 12, alpha -L-Fucp-(1 -->2)-4-O-Me-beta -D-Galp-(1 --> OAllyl) 15, and 2-O-Me-alpha -L-Fucp-(1 -->2)-4-O-Me-beta -D-Galp-(1 --> OAllyl) 18 have been synthesized. Glycosylation reactions were performed using ethyl 1-thiofueopyranosides as glycosyl donors and N-iodosuceiniinide-triflic acid as the activating agent. The O-methylated disaccharides correspond to highly immunogenic O-glycan antigens occurring at the surface of Toxocara canis and Toxocara cati larvae.

  DOI：

  10.1081/car-100108285
• 作为产物：
  描述：

  6-deoxy-L-galactose 在 氢氧化钾 、 三氟化硼乙醚 、 sodium methylate 、 sodium acetate 、 乙酸酐 、 对甲苯磺酸 、 三氟乙酸 作用下， 以 氯仿 、 二甲基亚砜 为溶剂， 反应 48.75h， 生成 ethyl 2-O-methyl-1-thio-β-L-fucopyranoside
  参考文献：
  名称：

  Synthesis of lipooligosaccharides related to nodulation factors ofRhizobium sp. NGR234

  摘要：

  Trisaccharide analogs of natural nodulation factors from Rhizobium sp. NGR234, namely, 2-acetamido-2-deoxy-4-O-(2-deoxy-2-hexadecanamido-beta-D-glucopyranosyl)-6-O- (2-O-methyl-alpha-L-fucopyranosyl)-D-glucopyranose and its derivatives containing a 4-O-acetyl or a 3-O-sulfo group at the L-fucose residue, were synthesized. The oligosaccharides synthesized were shown to possess biological activity.

  DOI：

  10.1007/bf02495661

文献信息

• Iodonium ion-assisted synthesis of a haptenic tetrasaccharide fragment corresponding to the inner cell-wall glycopeptidolipid of Mycobacterium avium serotype 4
  作者：Helene M. Zuurmond、Gerrit H. Veeneman、Gijs A. van der Marel、Jacques H. van Boom

  DOI：10.1016/0008-6215(93)80102-k

  日期：1993.3

  Condensation of ethyl 2,4-di-O-benzoyl-1-thio-alpha-L-rhamnopyranoside with ethyl 3-O-benzyl-4-O-chloroacetyl-2-O-methyl-1-thio-beta-L-fucopyranoside in the presence of iodonium di-sym-collidine perchlorate afforded exclusively ethyl 2,4-di-O-benzoyl-3-O-(3-O-benzyl-4-O-chloroacetyl-2-O-methyl-alpha-L-fucopyranosyl)-1-thio-alpha-L-rhamnopyranoside. This disaccharide derivative was extended at C-1 with 3-benzyloxycarbonylaminopropyl 6-deoxy-3,4-O-isopropylidene-alpha-L-talopyranoside, using N-iodosuccinimide and triflic acid as the catalyst, to furnish 3-benzyloxycarbonylaminopropyl 6-deoxy-2-O[2,4-di-O-benzoyl-3-O-(3-O-benzyl-4-O-chloroacetyl-2-O-methyl-alpha-L-fucopyranosyl)-alpha-L-rhamnopyranosyl]-3,4-0-isopropylidene-alpha-L-talopyranoside (20). Selective removal of the chloroacetyl group from 20, followed by condensation with ethyl 2,3-di-O-benzoyl-4-O-methyl-1-thio-alpha-L-rhamnopyranoside in the presence of the same thiophilic promoter, yielded a fully protected tetrasaccharide derivative. Deprotection of the latter gave the target compound 3-aminopropyl 6-deoxy-2-O-3-O-[2-O-methyl-(4-O-methyl-alpha-L-rhamnopyranosyl)-alpha-L-fucopyranosyl]-alpha-L-rhamnopyranosyl}alpha-L-talopyranoside (1).
• Iodonium ion assisted synthesis of a common inner core trisaccharide fragment corresponding to the cell-wall phenolic glycolipid of Mycobacterium kansasii
  作者：Korien Zegelaar-Jaarsveld、Gijs A. van der Marel、Jacues H. van Boom

  DOI：10.1016/s0040-4020(01)89043-8

  日期：——

  The spacer containing trimer 4-(aminoethyl)phenyl 2,4-di-O-Me-3-O-[2-O-methyl-3-O-(4-O-acetyl-2-O-methyl-alpha-L-fucopyranosyl)-alpha-L-rhamnopyranosyl]-alpha-L-rhamnopyranoside (2) was prepared by stepwise extension of 4-[2-(benzyloxycarbonyl-amino)ethyl]phenyl 2,4-di-O-methyl-alpha-L-rhamnopyranoside (19) with property protected ethyl thioglycosides of L-rhamnose 8 and L-fucose 12 or 16 using iodonium ions as promotors. The resulting trimers 22 or 23 were deblocked in two steps to give homogeneous 2. Alternatively, fully protected trimer 22 was assembled by iodonium ion assisted condensation of the phenyl 1-thio-alpha-L-rhamnopyranoside 29 with 12 followed by extension of dimer 31 with 19.
• Stereoselective preparation of dioxolane-type endo-benzylidene acetals by kinetically controlled reactions
  作者：J. Kerékgyártó、A. Lipták

  DOI：10.1016/0008-6215(93)84142-s

  日期：1993.10