Sodium borohydride → 5-(3,4,5,6,7,8-hexahydro-1H-isoquinolin-2-ylmethyl)-2-methyl-pyrimidin-4-ylamine

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Reaktionsschritte

A solution of 9.81 g (0.030 mol) of 2-(4-amino-2-methyl-pyrimidin-5-ylmethyl)-5,6,7,8-tetrahydro-isoquinolinium chloride hydrochloride in 50 ml of methanol was treated portionwise at 10° with 3.5 g (0.092 mol) of sodium borohydride. The mixture was stirred at room temperature for 1 hour and completely freed from the solvents. The residue was partitioned between ethyl acetate and water, extracted and recrystallized from petroleum ether. 5.7 g (74%) of 5-(3,4,5,6,7,8-hexahydro-1H-isoquinolin-2-ylmethyl)-2-methyl-pyrimidin-4-ylamine were obtained as white crystals; m.p. 137°-139° (dec.).

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