4,6-Dichloro-5-(2-methoxy-phenoxy)-2-morpholin-4-yl-pyrimidine → 5-Isopropyl-pyridine-2-sulfonic acid 6-chloro-5-(2-methoxy-phenoxy)-2-morpholin-4-yl-pyrimidin-4-yl-amide

Beteiligte Stoffe

Reaktionsschritte

A solution of 1.18 g of 4,6-dichloro-5-(2-methoxy-phenoxy)-2-morpholin-4-yl-pyrimidine and 2.12 g (8.88 mmol) of 5-isopropyl-pyridine-2-sulphonamide potassium salt in 25 ml of dry DMSO was heated to 80° C. for 3 hours until the dichloride had disappeared completely. The DMSO was removed in a high vacuum, the residue was taken up with 60 ml of water and the aqueous solution was washed three times with diethyl ether. The solution was then acidified to pH 3.5 with 1N HCl and the product was extracted three times with ethyl acetate. The organic phases were washed twice with water and finally once with saturated sodium chloride solution, combined, dried with sodium sulphate and evaporated. The crystalline residue was digested twice with absolute diethyl ether in order to completely remove a trace of 5-isopropyl-pyridine-2-sulphonamide. The crystals remaining behind were filtered off and dried. There were obtained 1.66 g (96%) of 5-isopropyl-pyridine-2-sulphonic acid 6-chloro-5-(2-methoxy-phenoxy)-2-morpholin-4-yl-pyrimidin-4-ylamide as white crystals of m.p. 168°-176° C., MS: (M-H)- =518.3.

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