A series of dicarbamates have been synthesized by addition of diols to isocyanates. These products were characterized by NMR, IR, and HRMS analyses. Substituent effects on the barrier to rotation around N-CO bond were investigated using variable temperature 1H NMR spectroscopy.
H. Maouati, I. Chniti, M.A.K. Sanhoury, D. Merlet, I. Chehidi
Dicarbamates, diols, isocyanates, barrier to rotation, variable temperature 1H NMR