Water → 3-benzyl-6-(1,4-dioxa-spiro[4.5]dec-8-yloxy)-7-methoxy-3H-quinazolin-4-one

Participants

Reaction Conditions

Reaction Steps

At 50° C. 16.0 g potassium carbonate and 20.0 g of 8-methanesulphonyloxy-(1,4-dioxa-spiro[4,5]decan are added to 20.0 g 3-benzyl-3,4-dihydro-4-oxo-6-hydroxy-7-methoxy-quinazoline in 150 ml N,N-dimethylformamide and the mixture is vigorously stirred for 18 hours at 80° C. To complete the reaction potassium carbonate and 8-methanesulphonyloxy-(1,4-dioxa-spiro[4,5]decane are each added three times more and in each case the mixture is stirred for several hours at 80° C. The reaction mixture is cooled and slowly combined with a total of 500 ml of water. The precipitate is suction filtered, washed with water and dried.

Provenance & Evidence