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An efficient one-pot synthesis of diarylpyrazolo[1,5-a]pyrimidine from isoflavones

✍ Scribed by Zun-Ting Zhang; Yu-Qing Ma; Yong Liang; Dong Xue; Qing He

Publisher
Journal of Heterocyclic Chemistry
Year
2010
Tongue
English
Weight
168 KB
Volume
48
Category
Article
ISSN
0022-152X

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✦ Synopsis

Abstract

Direct synthetic methods of 6,7‐diphenylpyrazolo[1,5‐a]pyrimidine derivatives have been developed. Cyclocondensation of isoflavones with 3‐aminopyrazole in the presence of sodium methoxide as alkali promoter gave 6,7‐diphenylpyrazolo[1,5‐a]pyrimidines in moderate to good yields. J. Heterocyclic Chem., (2011).

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## Abstract An efficient environmentally friendly synthesis of poly‐substituted pyrimidines has been developed via a four‐component, one‐pot reaction of malononitrile, carbon disulfide, alkyl halide and __S__‐alkylisothiouronium salt in water at room temperature. Water as solvent, mild reaction con