Substituted benzyl carbamates with herbicial properties

Abstract

Substituted benzyl carbamates of formula I ##STR1## wherein R is halogen, trifluoromethyl, cyano, nitro or C.sub.1 -C.sub.3 haloalkoxy; Z is hydrogen or halogen; or Z and R together in 2- and 3-position of the phenyl ring form the group --OCF.sub.2 O--; R.sub.1 is C.sub.1 -C.sub.5 alkyl; wherein in case R and Z together in 2- and 3-position of the phenyl ring form the group --OCF.sub.2 --, R.sub.2 and R.sub.3 are each independently of the other hydrogen, methyl or ethyl; and in case R is halogen, trifluoromethyl, cyano, nitro or C.sub.1 -C.sub.3 haloalkoxy, R.sub.2 is methyl or ethyl; and R.sub.3 is hydrogen, methyl or ethyl; X is oxygen, sulfur, --SO-- or --SO.sub.2 --; Y is hydrogen, halogen, C.sub.1 -C.sub.3 alkyl, C.sub.1 -C.sub.3 haloalkyl, C.sub.1 -C.sub.3 alkoxy or cyano; and n is 0, 1 or 2; and the diastereoisomers thereof, have pre- and postemergence herbicidal properties. The preparation of these compounds and the use thereof as herbicides are described.

Dependencies are inferred from the claim text.