Cesium acetate → 2-(Hydroxymethyl)-3,6,7,8-tetrahydro-4H-cyclopenta[g]quinazolin-4-one

Participants

Reaction Conditions

Reaction Steps

A solution of caesium acetate (14.4 g, 75.2 mmol) in dry DMF (40 ml) was heated to 60° C. under argon for 30 min. The mixture was cooled to 40° C. and a suspension of 2-chloromethyl-3,4,7,8-tetrahydro-6H-cyclopenta[g]quinazolin-4-one (L. Skelton, V. Bavetsias, A. Jackman, WO 00/050417-A1; 2.2 g, 9.4 mmol) in dry DMF (60 ml) was added via a cannula. The mixture was heated to 80° C. under argon for 16 h. The mixture was cooled to room temperature and the solvent was removed in vacuo. The residue was suspended in water (50 ml) and MeOH (20 ml). The pH was adjusted to 12.5 with 1M sodium hydroxide solution and the brown suspension was stirred for 2 h at room temperature. The insoluble brown solid was removed by filtration and the resulting solution was acidified to pH 5 with 1M hydrochloric acid.

Provenance & Evidence