The greatest yield in the synthesis of diaziridines from carbonyl compounds, amines, and aminating reagents in water is achieved at a specific pH, which shifts to less alkaline values with increasing -I effect of the substituents in the carbonyl compound and with decreasing pK(BH+) value of the amine. The role of pH is related to the conditions for the generation of an immonium from the intermediate alpha-aminocarbinol. The nuclear Overhauser effect was used to determine the orientation of the substituents in several diastereomers of the didikyldiaziridines obtained.
The greatest yield in the synthesis of diaziridines from carbonyl compounds, amines, and aminating reagents in water is achieved at a specific pH, which shifts to less alkaline values with increasing -I effect of the substituents in the carbonyl compound and with decreasing pK(BH+) value of the amine. The role of pH is related to the conditions for the generation of an immonium from the intermediate alpha-aminocarbinol. The nuclear Overhauser effect was used to determine the orientation of the substituents in several diastereomers of the didikyldiaziridines obtained.