Diaziridinones. V. Reduction by phosphite to carbodiimide and peracid oxidation of carbodiimide to diaziridinone

Convenient synthesis of phosphonohydrazines from arylamines

“…Phosphites are known to be excellent reducing agents and the reduction of N–N bonds in diaziridinones and N–O bonds in nitro compounds has been reported. 21–23 Further mechanistic investigation is currently under way and focuses on the characterization of reaction intermediates.…”

Estimation by bond-additivity schemes of the relative thermodynamic stabilities of three-membered-ring systems and their open dipolar forms

“…The heat of formation of 45 is calculated in eq 13. Thus, 44 would normally be the lowest energy dipolar form of AH, (45) Table III lists energy differences between open (44) and closed forms of -lactone, dimethyl -lactone, and diphenyl -lactone using the format of eq 12 and the same coulombic term in all cases. The parent compound should exist in the closed form but not be much more stable than the open form.…”