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A facile and efficient method for the preparation of 3,4,6,7-tetrahydro-9-(1,2-dihydro-2-oxoquinolin-3-yl)-2H-xanthene-1,8(5H,9H)-diones from substituted 2-chloro-3-formylquinoline and 1,3-cyclohexanedione or dimedone in water at 90°C using parallel synthesizer is reported. The present methodology offers a tandem-cascade methodology, high yield, and operational simplicity.
An efficient and regioselective N-alkylation of 4(3H)-pyrimidone with various electrophiles in the presence of Fe nano particle is reported. The catalyst initiates N-alkylation of amides by alkyl chlorides. The reaction of equimolar 4(3H)-pyrimidone and 2-chloro-3-(chloromethyl)quinolines in the presence of KOH and Fe nano particle (5mol%) in DMSO solution under reflux condition formed 3-[(2-chloroquinolin-3-yl]methyl)pyrimidin-4(3H)ones.
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