A general one-pot synthesis of dibenz[b,f][1,4] oxazepine-11(10H)-carboxamides is described. The Ugi four-component reaction (U-4CR) of 2-aminophenols, cyclohexyl isocyanide, 2-chloro-5-nitrobenzaldehyde, and 2-bromobenzoic acids in MeOH in the presence of 25 mol% Mg(ClO4)2 at 30-40 .C for 22-95 h gave the linear Ugi products. The latter were treated with aqueous K2CO3 in MeOH under microwave heating...
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