Isocyanoalkyl carbonic acid derivatives, their conversion into secondary amidoalkyl carbonic acid derivatives by isocyanide-multicomponent reactions, as well as these secondary amidoalkyl carbonic acid derivatives

Compounds of the general formula I ##STR31## wherein A is a group of the formula ##STR32## Z is an O or S atom, and the radicals R.sub.1 to R.sub.4 and, when present, R.sub.6 and R.sub.7 each have a maximum of 20 carbon atoms and are independently of one another H atoms, substituted or unsubstituted alkyl, alkenyl, alkynyl, alkaryl, aryl, alicyclic radicals, heteroalicyclic or heteroaryl radicals having up to 4 hetero atoms, and optionally two of the radicals R.sub.1 to R.sub.4 and, when present, R.sub.6 and R.sub.7 that are separated from one another by up to two carbon atoms are constituents of a common ring system, the ring system comprising a substituted or unsubstituted alicyclic monocycle (5 to 8 ring atoms), a heteroalicyclic monocycle (5 to 8 ring atoms with up to 2 hetero atoms (O, N, S), an alicyclic bicycle (7 to 14 ring atoms) or a heteroalicyclic bicycle (7 to 14 ring atoms with up to 4 hetero atoms (O, N, S) and R.sub.5 has a maximum of 20 carbon atoms and is a substituted or unsubstituted alkyl, alkenyl, alkynyl, allyl, alkaryl, aryl, alicyclic radical, heteroalicyclic or heteroaryl radical having up to 4 hetero atoms (hetero atoms are O, N, S);

• wherein the compounds have one isocyano functional group.