2-Propanesulfonyl chloride → HCID 135985185, compound

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The title compound was prepared using 2-propyl-sulphonyl chloride and 2-(5-amino-2-ethoxyphenyl)-pyrido[3,2-d]pyrimidin-4(3H)-one (Example 20), following the procedure of Example 12, and was obtained as a hydrated solid (59%), m.p. 211°-213° C. Found: C,54.98; H,5.07; N;14.21. C18H20N4O4S;0.25 H2O requires C,55.02; H,5.26; N,14.26%.

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