1273577-71-1Relevant articles and documents
Synthetic method for 3-bromopyrazolo[1,5-alpha]pyrimidine-6-formic acid
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Paragraph 0031; 0044-0045, (2018/10/11)
The invention provides a synthetic method for 3-bromopyrazolo[1,5-alpha]pyrimidine-6-formic acid. The synthetic method comprises the following steps: 3-amino-1H-pyrazole is used as a raw material, the3-amino-1H-pyrazole and 2-bromomalonaldehyde are subjected to condensation to obtain 6-bromo-pyrazolo[1,5-alpha]pyrimidine, the 6-bromo-pyrazolo[1,5-alpha]pyrimidine reacts with PdCl2 and triethylamine to obtain methyl pyrazolo[1,5-alpha]pyrimidine-6-formate, a hydrolysis reaction is performed to obtain pyrazolo[1,5-alpha]pyrimidine-6-formic acid, and finally the pyrazolo[1,5-alpha]pyrimidine-6-formic acid reacts with N-bromosuccinimide to obtain the 3-bromopyrazolo[1,5-alpha]pyrimidine-6-formic acid. The synthetic method for the 3-bromopyrazolo[1,5-alpha]pyrimidine-6-formic acid provided bythe invention has a simple synthetic route, a reasonable process and low costs of the raw materials, is simple, easy to obtain and convenient for operation and post treatment, has a high total yield,does not use a highly-toxic reagent, is easy to amplify, and can be used for large-scale production of the 3-bromopyrazolo[1,5-alpha]pyrimidine-6-formic acid.