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嘧啶

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嘧啶
IUPAC名
Pyrimidine
别名 1,3-二氮杂苯
识别
CAS号 289-95-2  checkY
PubChem 9260
ChemSpider 8903
SMILES
 
  • C1=CN=CN=C1
InChI
 
  • 1/C4H4N2/c1-2-5-4-6-3-1/h1-4H
InChIKey CZPWVGJYEJSRLH-UHFFFAOYAT
ChEBI 16898
KEGG C00396
MeSH pyrimidine
性质
化学式 C4H4N2
摩尔质量 80.088 g·mol⁻¹
熔点 20–22 ℃
沸点 123–124 ℃
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

dìng(英语:Pyrimidine)是一种杂环化合物,分子式为C4H4N2。嘧啶由2个原子取代分子间位上的2个形成,是一种二嗪。和吡啶一样,嘧啶保留了芳香性

嘧啶与核酸

形成DNARNA的五种碱基中,有三种是嘧啶的衍生物:胞嘧啶Cytosine)、胸腺嘧啶Thymine)、尿嘧啶Uracil)。

其中胸腺嘧啶只能出现在脱氧核糖核酸中,尿嘧啶只能出现在核糖核酸中,而胞嘧啶两者均可。在碱基互补配对时,胸腺嘧啶或尿嘧啶与腺嘌呤以2个氢键结合,胞嘧啶与鸟嘌呤以3个氢键结合。

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嘧啶
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