Abstract
Cyclization of alk-4-ynals with a,?-diaminoalkanes in DMSO under the action of KOH affords bicyclic N,N-enaminals – 6-(aryl- methylidene)octahydro[1,2-a]pyrimidines and 5-(arylmethylidene)hexahydro[1,2-a]imidazoles.
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