Methanol → 2-Methyl-6,7-dimethoxy-1[4,5,6-triethoxy-7-nitro-3-phthalidyl]-1,2,3,4-tetrahydro-isoquinoline

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Reaction Steps

200 g (0.6 mole) of 2-methyl-6,7-dimethoxy-3,4-dihydro-isoquinolinium iodide (prepared in the same manner as the compound of Example A) 186 g of 4,5,6-triethoxy-7-nitrophthalide and 100 g of potassium carbonate are added to 1.5 l of methanol while stirring. The reaction mixture is stirred for 24 hours at a temperature below the boiling point of the solvent, and is then allowed to cool; 900 ml of water is added and the reaction solution is allowed to crystallise. The solution is filtered, rinsed with methanol, and then with water.

Provenance & Evidence