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Syntheses of urea derivatives with substituted oxyoxalamide. (a) adamant-1-yl isocyanate, DMF, room temp; (b) ethyl (chlorocarbonyl)formate, Et3N, CH2Cl2, room temp; (c) 1 N NaOH, EtOH, room temp; (d) a corresponding oxyamine (in part A), EDCI, DMAP CH2Cl2, room temp; (e) CH3I, K2CO3, DMF, room temp.
