O-(2,3,4,6-tetra-O-benzyl-α-D-galactopyranosyl) dichloro-cyanoacetimidate | 947335-88-8

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: O-(2,3,4,6-tetra-O-benzyl-α-D-galactopyranosyl) dichloro-cyanoacetimidate
• 英文别名: [(2R,3R,4S,5S,6R)-3,4,5-tris(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-2-yl] 2,2-dichloro-2-cyanoethanimidate
• CAS: 947335-88-8
• 化学式: C₃₇H₃₆Cl₂N₂O₆
• 分子量: 675.609
• InChiKey: DGYOSWZFZMKDQP-NDFHSCBSSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  6.8
• 重原子数：
  47
• 可旋转键数：
  16
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.3
• 拓扑面积：
  103
• 氢给体数：
  1
• 氢受体数：
  8

反应信息

• 作为反应物：
  描述：

  O-(2,3,4,6-tetra-O-benzyl-α-D-galactopyranosyl) dichloro-cyanoacetimidate 、 癸醇 在 三氟甲磺酸三甲基硅酯 作用下， 以 正己烷 、 二氯甲烷 为溶剂， 以84%的产率得到decyl 2,3,4,6-tetra-O-benzyl-β-D-galactopyranoside
  参考文献：
  名称：

  Dichloro‐cyanoacetimidates as Glycosyl Donors

  摘要：

  Transformation of 1-O-unprotected glucose and galactose derivatives (1a-d) into O-glycosyl dichloro-cyanoacetimidates (2a-d) was performed with dichloro-cyanoacetonitrile in the presence of DBU as base. Reaction with different acceptors (3a-d) under TMSOTf catalysis afforded glycosides 4 in high yields. Competition experiments with O-glucopyranosyl trichloroacetimidate 10a, bearing a 4-tert-butylbenzyl group at 6-O, and O-glucopyranosyl dichloro-cyanoacetimidate 10b, bearing a 4-methylbenzyl group at 6-O, displayed similar reactivities for these two types of glycosyl donors.

  DOI：

  10.1080/07328300701410650
• 作为产物：
  描述：

  2,3,4,6-四-O-苄基-D-吡喃半乳糖 、 二氯丙二腈 在 1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下， 以 二氯甲烷 为溶剂， 反应 0.5h， 以60%的产率得到O-(2,3,4,6-tetra-O-benzyl-α-D-galactopyranosyl) dichloro-cyanoacetimidate
  参考文献：
  名称：

  Dichloro‐cyanoacetimidates as Glycosyl Donors

  摘要：

  Transformation of 1-O-unprotected glucose and galactose derivatives (1a-d) into O-glycosyl dichloro-cyanoacetimidates (2a-d) was performed with dichloro-cyanoacetonitrile in the presence of DBU as base. Reaction with different acceptors (3a-d) under TMSOTf catalysis afforded glycosides 4 in high yields. Competition experiments with O-glucopyranosyl trichloroacetimidate 10a, bearing a 4-tert-butylbenzyl group at 6-O, and O-glucopyranosyl dichloro-cyanoacetimidate 10b, bearing a 4-methylbenzyl group at 6-O, displayed similar reactivities for these two types of glycosyl donors.

  DOI：

  10.1080/07328300701410650

文献信息

• Dichloro‐cyanoacetimidates as Glycosyl Donors
  作者：Uwe Schmelzer、Zhaojun Zhang、Richard R. Schmidt

  DOI：10.1080/07328300701410650

  日期：2007.6.1

  Transformation of 1-O-unprotected glucose and galactose derivatives (1a-d) into O-glycosyl dichloro-cyanoacetimidates (2a-d) was performed with dichloro-cyanoacetonitrile in the presence of DBU as base. Reaction with different acceptors (3a-d) under TMSOTf catalysis afforded glycosides 4 in high yields. Competition experiments with O-glucopyranosyl trichloroacetimidate 10a, bearing a 4-tert-butylbenzyl group at 6-O, and O-glucopyranosyl dichloro-cyanoacetimidate 10b, bearing a 4-methylbenzyl group at 6-O, displayed similar reactivities for these two types of glycosyl donors.