Ureas sentence example
Mez (ibid., 1901, 35, p. 242) on substituted ureas, illustrate this point.
They are readily hydrolysed by water, and combine with bases to form alkyl ureas, and with alcohols to form carbamic esters.
The symmetrically substituted ureas are generally tasteless, while the asymmetrical derivatives are sweet.
Investigation of the cyanic ethers (1848) yielded a class of substances which opened out a new field in organic chemistry, for, by treating those ethers with caustic potash, he obtained methylamine, the simplest organic derivative of ammonia (1849), and later (1851) the compound ureas.Advertisement