Synthesis of urethanes and of polyurethanes catalysed by carbenes

摘要

Preparation method of a compound comprising at least one urethane Group HN - C (= o) - or,Said method comprising a step (e) is made to react with a compound (i) carrying two isocyanate Functional Groups - n = c = or with an Organic Compound (ii) two groups of Hydraulic bearerOxilo Oh, this reaction being carried out in the presence of a carbene (iii) used as Catalyst.The carbene (iii) responding to the General formula (iii) - 1 as follows: * * * * * formula: where X is a nitrogen Atom, and is a heteroatom selected from N, S, P, si and o, * NX is 3* NY is an integer equal to the Valence of the Atom; and * Each of the RX and ry groups United to heteroatoms X and y represent, independently of the other groups.A linear or branched chain Hydrocarbon, Cycling, either totally or partially, and optionally replaced, this chain of Preference: - an alkyl group, or alquenilo alquinilo,Linear or branched optionally replaced, for example by at least a Perfluoroalkyl Group, a linear or branched Perfluoroalkyl Group, Group; - a cycloalkyl, optionally substituted,For example, at least one alkyl or alkoxy Group, an optionally substituted aryl Group, for example by at least one alkyl or alkoxy Group; - an alkylaryl or arylalkyl Group,Where the party is optionally substituted aryl, for example by at least one alkyl or alkoxy Group.As one of the groups carried by the heteroatom x RX and ry were one of the groups by the hetero Atoms and optionally can be United together to form a heterocycle withS heteroatoms X and y and the Divalent carbon carrier of two electrons is not binding, the stage (e) being performed in an Inert atmosphere to a temperature that varies from 10 to 80 degrees,For example, ranging from 15 to 60 degrees Celsius.