Novel Rearrangement of cis-N-Alkyl-3-phenylaziridin-2-yl Phenyl Ketone Tosylhydrazones with Ethlyl Ether-Boron Trifluoride. Preparation of 1,2,5,6-Tetrahydro-1,2,3-triazine Derivatives
摘要:
1-Alkyl-4,6-diphenyl-1,2,5,6-tetrahydro-2-tosyl-1,2, 3-triazine derivatives (8a-g,i-k) which had a new skeletal ring were obtained in moderate yield (77-49 %) by the rearrangement of cis-N-alkyl-3-phenylaziridin-2-yl phenyl ketone toslhydrazones (3a-g, i-k) with ethyl ether-boron trifluoride(1/1) (7) in chloroform under room temperature. The starting materials (3a-1) were prepared in good yield (88-39%) by the condensation of cis-N-alkyl-3-phenylaziridin-2-yl phenyl ketones (1a-1) with tosylhydrazine (2) in chloroform in the presence of PPE (polyphosphoric acid ethyl ester) hydrolysate as a catalyst.