FTIR, NMR and kinetic studies of proton transfer reactions from nitro-substituted diarylmethanes to N-bases with guanidine character

1H NMR studies of proton transfer and σ-

1H NMR studies of proton transfer and σ-complex formation in the reactions of N-substituted picramides with oxygen and nitrogen bases

✍ Michael R. Crampton; Brenda Gibson; Raymond S. Matthews 📂 Article 📅 1980 🏛 John Wiley and Sons 🌐 English ⚖ 509 KB

## Abstract ^1^H NMR measurements of __N__‐substituted picramides in dimethyl sulphoxide‐methanol containing sodium methoxide show that the two major modes of 1:1 interaction involve transfer of an amino proton to give the conjugate base or methoxide attack at the 3‐position to give a σ‐adduct. The