Urethaniryhmä
Urethaniryhmä refers to a chemical functional group characterized by the presence of a carbamate ester. Its general structure is R-O-CO-NR'R'', where R, R', and R'' represent organic substituents. The urethane group is essentially an ester of carbamic acid. This group is found in a variety of organic compounds, most notably in polyurethanes, which are widely used polymers.
The formation of a urethane linkage typically occurs through the reaction of an isocyanate with an alcohol.
Beyond polymers, the urethane functional group appears in various organic molecules with biological or pharmaceutical activity.