Methyl iodide → HCID 19736741, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of ethyl 2-{(5-hydroxy-4-oxospiro [1,2,3,4-tetrahydroquinoline-2,1'-cyclohexan]-7-yl)oxy}acetate (prepared in Example 51 (1)) (0.15 g, 0.45 mmol), methyl iodide (0.071 g, 0.50 mmol), anhydrous potassium carbonate (0.094 g, 0.68 mmol), and dry DMF (4 ml) is stirred at 40° C. for 9 hours. After the addition of methyl iodide (0.14 g, 1.0 mmol), the stirring is continued for additional 4 hours. The solvent is removed by distillation and the residue is dissolved in ethyl acetate. The solution is washed with saturated brine, dried, and the solvent is removed. The residue is placed on a silica gel column and eluted with a mixture of ethyl acetate and dichloromethane (1:10). The earlier fractions containing oily materials are discarded. From the succeeding fractions, the desired product is obtained as a crystalline solid (0.067 g, 43%, m.p=158°-159° C.).

Provenance & Evidence