abstract |
Novel herbicides of the formula ##STR1## in which R 1 and R 2 each independently is alkyl, n X is cyano, alkoxycarbonyl or aminocarbonyl, and n Y is hydrogen or, if X is cyano, may also be trimethylsilyl, n can be prepared by reacting an imidazo-pyrrolo-pyridine of the formula ##STR2## with trimethylsilyl cyanide of the formula n n (CH.sub.3).sub.3 Si--CN. |