Reaction of 6‐ethylamino‐3‐methyluracil with nitrobenzenes

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<jats:title>Abstract</jats:title><jats:p>Reaction of 6‐ethylamino‐3‐methyluracil (<jats:bold>1</jats:bold>) with nitrobenzenes in hexamethylphosphoric triamide gave isoalloxazines in 3.8–18 percent yield. In the presence of potassium carbonate, reaction of <jats:bold>1</jats:bold> with <jats:italic>o</jats:italic>‐fluoronitrobenzene afforded 5‐substituted uracil <jats:bold>3</jats:bold> in moderate yield.</jats:p>

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