4,5-Di-O-(tert-butyldimethylsilyl)-2,3-O-isopropylidene-D-arabinose diethyl dithioacetal | 138458-95-4

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 4,5-Di-O-(tert-butyldimethylsilyl)-2,3-O-isopropylidene-D-arabinose diethyl dithioacetal
• CAS: 138458-95-4
• 化学式: C₂₄H₅₂O₄S₂Si₂
• 分子量: 524.977
• InChiKey: OHUXHHMKLWFXBC-AQNXPRMDSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  7.75
• 重原子数：
  32.0
• 可旋转键数：
  11.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  36.92
• 氢给体数：
  0.0
• 氢受体数：
  6.0

反应信息

• 作为反应物：
  描述：

  4,5-Di-O-(tert-butyldimethylsilyl)-2,3-O-isopropylidene-D-arabinose diethyl dithioacetal 在 咪唑 、 2,6-二甲基吡啶 、 N-溴代丁二酰亚胺(NBS) 作用下， 以 水 、 N,N-二甲基甲酰胺 、 乙腈 为溶剂， 反应 3.17h， 生成 (Z)-6-O-(tert-Butyldiphenylsilyl)-1,2-dideoxy-3,4-O-isopropylidene-1-(methyl 2,3,6-tri-O-benzyl-α-D-gluco-hexopyranosid-4-yl)-D-gluco-hex-1-enose
  参考文献：
  名称：

  Synthesis of .alpha.-methyl 1',2'-dideoxycellobioside: a novel C-disaccharide

  摘要：

  Bromonium ion induced 6-endo-trig cyclizations of E olefine derived from D-arabinose provide a stereoselective route to 2'-deoxyglucono-beta-C-glycosides. Use of delta-alkenols containing allylic isopropylidenes (i.e., 1) prevents formation of furan products due to the highly strained transition state necessary for formation of the trans [3.3.0] bicyclic systems. Because the exo-anomeric carbon is not involved in the cyclization, previously established stereocenters at this carbon are left intact. Application of this methodology to the synthesis of alpha-methyl 1',2'-dideoxycellobioside (22) is presented. The restricted rotation about the bond connecting the two sugars affords a unique staggared conformation of the disaccharide.

  DOI：

  10.1021/jo00029a024
• 作为产物：
  描述：

  2,3:4,5-di-O-isopropylidene-D-arabinose diethyldithioacetal 在 咪唑 、 对甲苯磺酸 作用下， 以 甲醇 、 水 、 N,N-二甲基甲酰胺 为溶剂， 反应 54.0h， 生成 4,5-Di-O-(tert-butyldimethylsilyl)-2,3-O-isopropylidene-D-arabinose diethyl dithioacetal
  参考文献：
  名称：

  Synthesis of .alpha.-methyl 1',2'-dideoxycellobioside: a novel C-disaccharide

  摘要：

  Bromonium ion induced 6-endo-trig cyclizations of E olefine derived from D-arabinose provide a stereoselective route to 2'-deoxyglucono-beta-C-glycosides. Use of delta-alkenols containing allylic isopropylidenes (i.e., 1) prevents formation of furan products due to the highly strained transition state necessary for formation of the trans [3.3.0] bicyclic systems. Because the exo-anomeric carbon is not involved in the cyclization, previously established stereocenters at this carbon are left intact. Application of this methodology to the synthesis of alpha-methyl 1',2'-dideoxycellobioside (22) is presented. The restricted rotation about the bond connecting the two sugars affords a unique staggared conformation of the disaccharide.

  DOI：

  10.1021/jo00029a024

文献信息

• Synthesis of .alpha.-methyl 1',2'-dideoxycellobioside: a novel C-disaccharide
  作者：Robert W. Armstrong、Bradley R. Teegarden

  DOI：10.1021/jo00029a024

  日期：1992.1

  Bromonium ion induced 6-endo-trig cyclizations of E olefine derived from D-arabinose provide a stereoselective route to 2'-deoxyglucono-beta-C-glycosides. Use of delta-alkenols containing allylic isopropylidenes (i.e., 1) prevents formation of furan products due to the highly strained transition state necessary for formation of the trans [3.3.0] bicyclic systems. Because the exo-anomeric carbon is not involved in the cyclization, previously established stereocenters at this carbon are left intact. Application of this methodology to the synthesis of alpha-methyl 1',2'-dideoxycellobioside (22) is presented. The restricted rotation about the bond connecting the two sugars affords a unique staggared conformation of the disaccharide.