Acrylic acid derivatives and fungicides which contain these compounds

An acrylic acid derivative of the formula:

• ##STR16## wherein R.sup.1 and R.sup.2 independently of one another are each C.sub.1 -C.sub.8 -alkyl;
• X is hydrogen, halogen, C.sub.1 -C.sub.4 -alkoxy, trifluoromethyl, cyano or nitro;
• y is hydrogen, alkyl, haloalkyl, alkoxyalkyl, cycloalkyl, aralkyl, aryl, aryloxy, halogen, an unsubstituted or substituted C.sub.4 H.sub.4 chain which is fused to the benzene radical, alkoxy, haloalkoxy, nitro, alkylthio, thiocyanato, cyano, or a group of the formula:
• ##STR17## wherein R' and R" independently of one another are each hydrogen, alkyl, alkoxy, alkylthio or cycloalkyl or are each phenyl which is unsubstituted or substituted by alkyl, halogen or alkoxy, and n is from 1 to 4.