Consecutive reactions between methyl 3-dehydroshikimiate, amines and 1,2-dichloroalkanes under microwave conditions: a practical, one-pot construction of N-substituted dihydrobenzoxazines

A biomass-involved, one-pot, two-step protocol for the synthesis of N-substituted 3,4-dihydro-2H-1,4-benzoxazines has been developed. A wide range of new compounds have been efficiently synthesized in moderate to excellent yields via the three-component consecutive reactions between methyl 3-dehydroshikimiate (3-MDHS), amines and 1,2-dichloroalkanes in short reaction times under microwave conditions.