Acetic Acid → Methyl 5-methylamino-3-hydroxy-2-methyl-3-indenylacetate

Beteiligte Stoffe

Reaktionsschritte

A solution of 0.05 mol of methyl 3-hydroxy-2-methyl-5-nitro-3-indenylacetate, 0.2 mol of 38% aqueous formaldehyde and 2 ml of acetic acid in 100 ml ethanol is reduced catalytically in the presence of a 10% Pd/C catalyst under 40 lb. p.s.i. hydrogen pressure at room temperature. The solution is filtered, evaporated and chromatographed on 300 g of silica gel to give methyl 5-methylamino-3-hydroxy-2-methyl-3-indenylacetate. The hydroxy ester is then dehydrated to methyl 5-dimethylamino-2-methyl-3-indenylacetate.

Herkunft & Nachweise