Method and intermediates for the production of 5-cyclohexylmethylhydantoin derivatives.

摘要

A method for the production of 5-cyclohexylmethylhydantoin derivatives of formula IV which comprises reducing, in the presence of a metal catalyst, a 5-(3-cyclohexene-1-yl) methylenehydantoin derivative obtained by the condensation of a hydantoin derivative and a 3-cyclohexene-1-carbaldehyde derivative in the presence of a monoalkanolamine, as well as 5-(3-cyclohexene-1-yl) methylenehydantion derivatives of formula I which are intermediates for the production thereof. wherein R<1>, R<2>, R<3>, R<4>, R<5> and R<6> are as defined in Claim 1.