Sodium Hydroxide → N2-(3-chloro-4-methoxyphenyl)-N4-cycloheptyl-6-(4-methylpiperzino)-1,3,5-triazine-4,2-diamine

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To a solution of 133 (0.5 g, 1.31 mmol) in 1,4-dioxane (5 mL) was added slowly a solution of 1-methylpiperizine (0.13 g, 1.31 mmol) in 1,4-dioxane (5 mL) followed by 2.5 N sodium hydroxide solution (0.5 mL, 1.31 mmol) and water (1.2 mL). The mixture was heated to reflux for 2.5–3 hours with stirring under nitrogen atmosphere and then cooled to 25° C. and diluted with water (10 mL). The mixture was then stirred for 10–15 min., the precipitated solid was filtered off and dried under vacuum to afford the title compound E18 as an off-white solid (0.5 g, 86%). mp 120–122° C.; HPLC: Inertsil ODS 3V (250×4.6 mm) 5 microns 65: 35 [0.01 M KH2PO4 (0.1% TFA):CH3CN], 223 nm, Rt 10.23 min, 98.50% purity); MS (CI): m/z 446 (M+H, 100), 375 (25).

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