Abstract
AbstractA method for the synthesis of new heterocyclic system representatives, i. e. imidazo[4,5‐d]thiazolo[4,3‐b]oxazole derivatives, by the reaction of thioglycolurils with α‐bromoketones has been developed. The reaction includes a cascade one‐pot S‐alkylation/nucleophilic addition/ring‐opening/ring‐closing process. This protocol is compatible with a broad scope of α‐bromoketones, diastereoselectively affording diverse products with 3aS*,4aR*,8aR*‐imidazo[4,5‐d]thiazolo[4,3‐b]oxazole core in 40–76 % yields.
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