2-Oxy and 2-thio-2,3-dihydrobenzofuranyl-5-aminosulfonates

Claim 1

A substituted benzofuranyl ester of the formula ##SPC15## where R 1 , R 2 and R 3 are identical or different and each denotes hydrogen or alkyl of 1 to 3 carbon atoms, or R 1 and R 2 together, or R 2 and R 3 together, denote alkylene of 2 to 5 carbon atoms, R 4 denotes hydroxy, alkoxy of 1 to 5 carbon atoms, alkenyloxy of 2 to 4 carbon atoms, alkynyloxy of 2 to 4 carbon atoms, methylmercapto, ethylmercapto, propylmercapto, benzylmercapto, β-phenylethylmercapto, p-chlorobenzylmercapto, phenoxy, nitrophenoxy, the group OCOR 12 , where R 12 denotes alkyl of 1 to 4 carbon atoms, allyl, methallyl, propargyl, butynyl, phenyl, tolyl, chlorophenyl, nitrophenyl, methylamino, dimethylamino, methoxy, ethoxy, propoxy, allyloxy, chloroallyloxy, propargyloxy, chlorobutynyloxy, phenylamino, tolylamino, chlorophenylamino or phenoxy, tolyloxy and chlorophenyloxy, R 5 and R 6 are identical or different and each denotes hydrogen, alkyl of 1 to 4 carbon atoms and chloro substituted alkyl of 1 to 4 carbon atoms, and R 7 , R 8 and R 9 are identical or different and each denotes hydrogen, methyl, ethyl, chloro, bromo, cyano, acetyl or methoxy.