Hydrochloric Acid → Pemetrexed

Beteiligte Stoffe

Reaktionsschritte

A mixture of 0.50 g (1.1 mmol) of N-[4-[2-[2-amino-4,7-dihydro-4-oxo-3H-pyrrolo[2,3-d]pyrimidin-5-yl]ethyl]benzoyl]glutamic acid dimethyl ester, prepared in Preparation 5, and 3.3 ml of 2N aqueous sodium hydroxide was stirred at room temperature for 48 hours and neutralized to a pH of 5 with 6M aqueous hydrochloric acid. The precipitate was filtered, washed with water and dried, to give 0.277 g of the above product in a yield of 59 percent.

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