Water → methyl 3,4-dihydro-2H-[1,3]oxazino[3,2-a]indole-10-carboxylate

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A mixture of methyl 2-(3-chloropropoxy)-indole-3-carboxylate (81.5 g, 0.304 mole), aqueous sodium hydroxide solution (3 ml, 10.8M, 0.335 mole), water (31 ml) and tetrabutylammonium bromide (4.9 g, 0.015 mole) in toluene (815 ml ) was stirred at 50-60° C. for about 45 minutes. The aqueous layer was removed and the organic layer washed twice with water (100 ml each wash). The resulting toluene solution was dried by azeotropic distillation of solvent (265 ml ) under reduced pressure (60° C., 160 mbar) giving a dried solution of the title compound in toluene.

Herkunft & Nachweise