| 摘要 |
Disclosed is a method for stably producing an isocyanate with high yield for a long time without using phosgene. This method for producing an isocyan ate does not cause the problems involved in the prior art. Specifically disc losed is a method for producing an isocyanate, which comprises a step wherei n a carbamic acid ester is reacted with an aromatic hydroxy compound, thereb y obtaining an aryl carbamate having a group derived from the aromatic hydro xy compound, and a step wherein the aryl carbamate is subjected to a decompo sition reaction. This method for producing an isocyanate is characterized in that the aromatic hydroxy compound is anaromatic hydroxy compound represent ed by the formula (1) below, which has a substituent R1 at at least one orth o-position of the hydroxyl group. (In the formula, ring A represents an opti onally substituted monocyclic or heterocyclic aromatic hydrocarbon ring havi ng 6-20 carbon atoms; R1 represents a group other than a hydrogen atom, whic h is an aliphatic alkyl group having 1-20 carbon atoms, an aliphatic alkoxy group having 1-20 carbon atoms, an aryl group having 6-20 carbon atoms, an a ryloxy group having 6-20 carbon atoms, an aralkyl group having 7-20 carbon a toms or an aralkyloxy group having 7-20 carbon atoms, each containing an ato m selected from a carbon atom, an oxygen atom and a nitrogen atom; and R1 an d A may combine together to form a ring structure.)
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