Dimethyl N,N′-(4-methyl-m-phenylene)dicarbamate

In the crystal structure of the title compound, C₁₁H₁₄N₂O₄, which can be used as an inter­mediate for the syhtnesis of isocyanates, there are two inter­molecular N—H...O hydrogen bonds.

Diisopropyl N,N′-(4-methyl-m-phenyl­ene)dicarbamate

The crystal structure of the title compound, C₁₅H₂₂N₂O₄, is stabilized by two inter­molecular N—H...O hydrogen bonds.