1-<(Benzyloxy)methyl>-4-methylimidazole-5-carboxaldehyde | 141849-13-0

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 英文名称: 1-<(Benzyloxy)methyl>-4-methylimidazole-5-carboxaldehyde
• 英文别名: 3-Benzyloxymethyl-5-methyl-3h-imidazole-4-carbaldehyde；5-methyl-3-(phenylmethoxymethyl)imidazole-4-carbaldehyde
• CAS: 141849-13-0
• 化学式: C₁₃H₁₄N₂O₂
• 分子量: 230.266
• InChiKey: AYSZILKBOFKGHK-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.6
• 重原子数：
  17
• 可旋转键数：
  5
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.23
• 拓扑面积：
  44.1
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  三甲基氯硅烷 、 1-<(Benzyloxy)methyl>-2,4,5-triiodoimidazole 、 碘甲烷 生成 1-<(Benzyloxy)methyl>-4-methylimidazole-5-carboxaldehyde
  参考文献：
  名称：

  Multifunctionalization of imidazole via sequential halogen-metal exchange: a new route to purine-ring analogs

  摘要：

  A new method for the synthesis of purine-ring analogs based upon the sequential halogen-metal exchange functionalization of 1-[(benzyloxy)methyl]-2,4,5-triiodoimidazole (1) has been developed and is illustrated by the synthesis of (1H)-imidazo[4,5-d]pyridazin-4(5H)-one (2-aza-3-deazahypoxanthine, 8). Treatment of 1 with BuLi followed by quench with PhSSPh afforded the 2-(phenylthio) derivative, which upon treatment with BuLi followed by quench with DMF gave the 5-carboxaldehyde. This aldehyde was converted into its ethylene acetal, which was treated with BuLi followed by quench with ClCO2CH3 to afford a 4-(methoxycarbonyl)imidazole. Removal of the phenylthio group with Al(Hg) and the (benzyloxy)methyl and ethylene acetal protecting groups concomitantly with 3 M HCl afforded methyl 5(4)-formylimidazole-4(5)-carboxylate, which underwent cyclo-condensation with ethanolic NH2NH2 to give target 8. This synthetic approach was found amenable to modification by efficient ''one-pot'' multistep transformations. Thus, treatment of 1 with (a) BuLi, (b) (CH3)3SiCl, (c) BuLi, (d) (CH3)2NN(CH3)CHO, (e) BuLi, and (f) (CH3OCO)2O afforded the N-protected 4-(methoxycarbonyl)-imidazole-5-carboxaldehyde (13) in 25% yield directly from 1. Imidazole 13 was then elaborated to 8 in two steps. 1-Formyl-1,2,2-trimethylhydrazine is a recommended replacement for DMF as a tandem formylating/ortho-metalation directing agent.

  DOI：

  10.1021/jo00040a011

表征谱图