Synthesis and reactivity of some mannich bases. VIII. Studies on several mannich bases derived from ortho-hidroxyacetophenones and their conversion into oximino derivatives

The synthesis of several Mannich bases resulting from the reaction of 2-hydroxy-4-methylacetophenone with paraformaldehyde and secondary amines is reported. Another series of products was obtained from N,N-dimethyl substituted Mannich bases by replacing the amino group with pyrrolidine. Most of the Mannich bases were transformed into oximes by treatment with hydroxylamine hydrochloride in 10% NaOH.