ChemicalBook CAS DataBase List 2-Chloropyrimidine-5-carbaldehyde

2-Chloropyrimidine-5-carbaldehyde synthesis

4synthesis methods

Product Name:2-Chloropyrimidine-5-carbaldehyde
CAS Number:933702-55-7
Molecular formula:C5H3ClN2O
Molecular Weight:142.54

5-Pyrimidinecarboxaldehyde, 1,2-dihydro-2-oxo- (9CI)

166757-62-6
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933702-55-7
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Yield:933702-55-7 84%

Reaction Conditions:

with N,N-dimethyl-aniline;trichlorophosphate in acetonitrile at 80; for 4 h;Solvent;Temperature;

Steps:

2.2.1-2.2.9 2.1 Synthesis of Compound II, 2-chloro-5-pyrimidinecarbaldehyde
To the round bottom flask was added 3.0 g of 2-hydroxy-5-aldehyde pyrimidine dissolved in 30 ml of acetonitrile. Add 5.56g phosphorus oxychloride and 0.53g N,N-dimethylaniline, The temperature was raised to 80 ° C and refluxed for 4 hours, and the reaction of the starting material by TLC was completed. After the reaction system is cooled to room temperature, an aqueous solution of sodium carbonate is added to the system. It was extracted with ethyl acetate and washed with water twice more. Evaporate dry. Obtaining 2.89 g of 2-chloro-5-aldehyde pyrimidine, a compound of formula II, The yield was 84%.

References:

East China Normal University;Anhui Top Beika Pharmaceutical Co., Ltd.;Shanghai Bei Ka Pharmaceutical Co., Ltd.;Luo Yu;Qin Lingyan;Xia Xiaoyan;Quan Hao;Zhan Li;Li Qian;Kang Litao;Yang Shiqiong CN109369539, 2019, A Location in patent:Paragraph 0059-0095

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131467-06-6 Synthesis