Ring contraction synthesis of 2,5-disubs
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Stefan Robev
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Article
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1978
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Elsevier Science
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French
β 209 KB
A method for synthesis of 2,5-disubstituted-3-arylamino-4-cyanopyrroles from newly synthesised 2,6-disubstituted-4-arylamino-5-cyanopyrimidines by treatment with zinc and acetic acid, the yields being up to SO%, is developed.