An Acid-Catalyzed O,N-Acyl Migration and Application to the Synthesis of N-(4-Isopropyl-2,2-dimethyl-3-oxo-3,4-dihydro-2H-benzo(1,4)oxazine-6-carbonyl) guanidine Methanesulfonate (KB-R9032), a Novel Na/H Exchange Inhibitor.
Consecutive reactions between methyl 3-dehydroshikimiate, amines and 1,2-dichloroalkanes under microwave conditions: a practical, one-pot construction of N-substituted dihydrobenzoxazines
作者:Ensheng Zhang、Tianlong Xu、Dejian Wang、Tongkun Huang、Mu Yuan、Jun Li、Yong Zou
DOI:10.1039/c3ra47221c
日期:——
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.