4-Chloro-6-ethyl-5-fluoropyrimidine

4-Chloro-6-ethyl-5-fluoropyrimidine is a substituted pyrimidine derivative used as a chemical intermediate in organic synthesis, especially in pharmaceutical development. It contains a pyrimidine ring bearing chlorine at position 4, fluorine at position 5, and an ethyl group at position 6. These electron-withdrawing halogens along with the alkyl substituent make the molecule reactive for further nucleophilic substitution and coupling reactions. Such intermediates are commonly used in the synthesis of complex drug molecules, including antifungal and antiviral agents, where precise heterocyclic modifications are required.