Patent ID: 6235910
Filing Date: 2001-05-22
Classification: C07D

Abstract:
A process for the preparation of compounds of the formula (I) ##STR8##whereinX denotes oxygen, sulfur or selenium andR.sup.1 denotes --H, (C.sub.1 -C.sub.18)-alkyl, (C.sub.2 -C.sub.18)-alkenyl, (C.sub.2 -C.sub.18)-alkinyl, (C.sub.6 -C.sub.18)-aryl, (C.sub.7 -C.sub.19)-aralkyl, (C.sub.3 -C.sub.18)-heteroaryl, (C.sub.4 -C.sub.19)-heteroaralkyl, (C.sub.1 -C.sub.8)-alkyl-(C.sub.6 -C.sub.18)-aryl, (C.sub.1 -C.sub.8)-alkyl-(C.sub.3 -C.sub.19)-heteroalkyl, (C.sub.3 -C.sub.8)-cycloalkyl, (C.sub.1 -C.sub.8)-alkyl-(C.sub.3 -C.sub.8)-cycloalkyl, (C.sub.3 -C.sub.8)-cycloalkyl- or (C.sub.1 -C.sub.8)-alkyl radicals,R.sup.2 denotes --H, (C.sub.1 -C.sub.18)-alkyl, (C.sub.2 -C.sub.18)-alkenyl, (C.sub.2 -C.sub.18)-alkinyl, (C.sub.6 -C.sub.18)-aryl, (C.sub.7 -C.sub.19)-aralkyl, (C.sub.3 -C.sub.18)-heteroaryl, (C.sub.4 -C.sub.19)-heteroaralkyl, (C.sub.1 -C.sub.8)-alkyl-(C.sub.6 -C.sub.18)-aryl, (C.sub.1 -C.sub.8)-alkyl-(C.sub.3 -C.sub.19)-heteroalkyl, (C.sub.3 -C.sub.8)-cycloalkyl, (C.sub.1 -C.sub.8)-alkyl-(C.sub.3 -C.sub.8)-cycloalkyl, (C.sub.3 -C.sub.8)-cycloalkyl- or (C.sub.1 -C.sub.8)-alkyl radicals,R.sup.3 denotes --H, (C.sub.1 -C.sub.18)-alkyl, (C.sub.2 -C.sub.18)-alkenyl, (C.sub.2 -C.sub.18)-alkinyl, (C.sub.6 -C.sub.18)-aryl, (C.sub.7 -C.sub.19)-aralkyl, (C.sub.3 -C.sub.18)-heteroaryl, (C.sub.4 -C.sub.19)-heteroaralkyl, (C.sub.1 -C.sub.8)-alkyl-(C.sub.6 -C.sub.18)-aryl, (C.sub.1 -C.sub.8)-alkyl-(C.sub.3 -C.sub.19)-heteroalkyl, (C.sub.3 -C.sub.8)-cycloalkyl, (C.sub.1 -C.sub.8)-alkyl-(C.sub.3 -C.sub.8)-cycloalkyl, (C.sub.3 -C.sub.8)-cycloalkyl- or (C.sub.1 -C.sub.8)-alkyl radicals, comprising reactingan aldehyde compound of the general formula (II) ##STR9##wherein R.sup.1 is defined above, with a urea compound of the general formula (III) ##STR10##wherein X, R.sup.2 and R.sup.3 are defined above,in the presence of carbon monoxide (CO) and a catalytically active metal compound.