5-chloro-5-fluoro-6-hydroxy-5,6-dihydrouracil | 58532-67-5

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二嗪类
• 英文名称: 5-chloro-5-fluoro-6-hydroxy-5,6-dihydrouracil
• 英文别名: 5-chloro-5-fluoro-6-hydroxy-dihydro-pyrimidine-2,4-dione；DL-5-Fluor-5-chlor-6-hydroxy-hydrouracil；5-chloro-5-fluoro-6-hydroxy-1,3-diazinane-2,4-dione
• CAS: 58532-67-5
• 化学式: C₄H₄ClFN₂O₃
• 分子量: 182.539
• InChiKey: SIHYZBMNUKMPBR-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.95
• 重原子数：
  11.0
• 可旋转键数：
  0.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  78.43
• 氢给体数：
  3.0
• 氢受体数：
  3.0

反应信息

• 作为产物：
  描述：

  5-氟脲嘧啶 在 硫酸 、 potassium chloride 、 双氧水 作用下， 以 水 为溶剂， 以93%的产率得到5-chloro-5-fluoro-6-hydroxy-5,6-dihydrouracil
  参考文献：
  名称：

  5-Fluoro-5-halo- and 5-fluoro-5-nitro-substituted uracil derivatives. Synthesis and structure

  摘要：

  5-Bromo-5-fluoro- and 5-chloro-5-fluoro-6-hydroxy-5,6-dihydrouracils were obtained in high yields by oxidative halogenation of 5-fluorouracil. Nitration of 5-fluorouracil gave 5-fluoro-6-hydroxy-5-nitro-5,6-dihydrouracil. Theoretical calculations in B3LYP/6-311+G(d,p) // B3LYP/6-311G(d,p) + IEFPCM approximation and GIAO simulation of C-13 NMR spectra and spin-spin coupling constants agree with the structure of the compounds obtained, which manifest an equatorial orientation of the fluorine atom and an axial orientation of the hydroxy group at position 6 of the dihydrouracil ring. The principal possibility of oxidative iodination of 5-halouracils was studied in B3LYP/CEP-121G approximation. It was found that reversible elimination of iodine by a nucleophilic agent to give the original compounds is the main transformation pathway of the intermediate in this process.

  DOI：

  10.1007/s10593-015-1737-y

文献信息

• Studies on fluorinated pyrimidines. I. A new method of synthesizing 5-fluorouracil and its derivatives.
  作者：OSAMU MIYASHITA、KOICHI MATSUMURA、HIROSHI SHIMADZU、NAOTO HASHIMOTO

  DOI：10.1248/cpb.29.3181

  日期：——

  A series of 5-fluoro-6-substituted-5, 6-dihydrouracil-5-carboxylic esters (13), -5-carboxamides (15, 16), and -5-carbonitriles (18, 19) was prepared by direct fluorination of the corresponding uracil-5-carboxylic esters (6), -5-carboxamide (14), and -5-carbonitrile (17) with fluorine or trifluoromethyl hypofluorite (CF3OF) in the presence of water, methanol and/or acetic acid. Hydrolysis of the above-mentioned products under mild conditions gave 5-fluorouracil (1a) in high yield. Some applications of the present method for the synthesis of 1-(2-tetrahydrofuryl)-5-fluorouracil (1b) were also described.

  一系列5-氟-6-取代-5,6-二氢尿嘧啶-5-羧酸酯(13)、-5-羧酰胺(15, 16)和-5-氰(18, 19)通过将相应的尿嘧啶-5-羧酸酯(6)、-5-羧酰胺(14)和-5-氰(17)直接氟化，使用氟或三氟甲基亚氟酸酯(CF3OF)，在水、甲醇和/或醋酸的存在下制备而成。在温和条件下水解上述产物，得到了高产率的5-氟尿嘧啶(1a)。还描述了该方法在合成1-(2-四氢呋喃基)-5-氟尿嘧啶(1b)中的一些应用。