Potassium Iodide → 3-[2-[4-[2-(4-fluorophenyl)-1,3-dioxolan-2-yl]-1-piperidinyl]ethyl]-6-nitro-2,4(1H,3H)-quinazolinedione

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Reaction Steps

A mixture of 16.2 parts of 3-(2-chloroethyl)-6-nitro-2,4(1H,3H)-quinazolinedione, 15 parts of 4-[2-(4-fluorophenyl)-1,3-dioxolan-2-yl]piperidine, 10 parts of sodium hydrogen carbonate, 0.1 parts of potassium iodide and 135 parts of N,N-dimethylformamide was stirred and heated overnight at 100°-120° C. The reaction mixture was cooled and poured onto water. Stirring was continued till complete precipitation. The precipitate was filtered off and dissolved in trichloromethane. The thus formed emulsion was dried, filtered and evaporated. The residue was crystallized from acetonitrile, yielding 18.6 parts (64%) of 3-[2-[4-[2-(4-fluorophenyl)-1,3-dioxolan-2-yl]-1-piperidinyl]ethyl]-6-nitro-2,4(1H,3H)-quinazolinedione; mp. 250.9° C. (28).

Provenance & Evidence