Substituted 1,2,4-triazolo[1,5-a]-pyrimidine-2-sulfonamides and compositions and methods of controlling undesired vegetation and suppressing the nitrification of ammonium nitrogen in soil

Claim 1

Method for suppressing the nitrification of ammonium nitrogen in growth media which comprises impregnating said growth media with a nitrification inhibiting amount of a compound having the formula: ##STR94## wherein Ar represents an aromatic or heteroaromatic ring chosen from among phenyl; 1- or 2-napthyl; 2-, 3- or 4-pyridyl; 2- or 3-thienyl; 2- or 3-furyl; 2-, 4- or 5-thiazoyl; 2-, 4- or 5-imidazoyl; 2-, 4- or 5-oxazoyl; 3-, 4- or 5-isothiazoyl; 3-, 4- or 5-isoxazoyl; 3-, 4- or 5-pyrazoyl; 2-benzthiazoyl; 2-benzoxazoyl; 2-benzimidazoyl or 1-benztriazoyl; and Ar is unsubstituted or Ar is substituted with one to five substituents chosen from among (except in the cases of thio, sulfinyl and sulfonyl substituents where if one of these substituents is present the other one to four Ar substituents may not be chosen from among the other two); oxycarbonyl substituents where the other one to four Ar substituents may not be chosen from among different oxycarbonyl; or aminocarbonyl substituents; where the other one to four Ar substituents may not be chosen from among different aminocarbonyl substituents; C 1 -C 6 alkyl; halo; C 1 -C 6 mono- or polyhaloalkyl; phenyl; hydroxy; C 1 -C 6 alkoxy; C 1 -C 6 mono- or polyhaloalkoxy; phenoxy; phenoxy substituted with one or more of groups chosen from halo, C 1 -C 6 alkyl or C 1 -C 6 haloalkyl; 2-pyridyloxy; 2-pyridyloxy substituted with one or more of groups chosen from halo, C 1 -C 6 alkyl or C 1 -C 6 haloalkyl; C 1 -C 6 alkylamino; C 1 -C 6 dialkylamino; nitro; C 1 -C 6 alkylthio; C 1 -C 6 polyhaloalkylthio; C 1 -C 6 alkylsulfinyl; C 1 -C 6 polyhaloalkylsulfinyl; C 1 -C 6 alkylsulfonyl; C 1 -C 6 polyhaloalkylsulfonyl; phenylthio; phenylthio substituted with one or more of groups chosen from halo, C 1 -C 6 alkyl or C 1 -C 6 haloalkyl; phenylsulfinyl; phenylsulfinyl substituted with one or more of groups chosen from halo, C 1 -C 6 alkyl or C 1 -C 6 haloalkyl; phenylsulfonyl; phenylsulfonyl substituted with one or more of groups chosen from halo, C 1 -C 6 alkyl or C 1 -C 6 haloalkyl; cyano; carboxyl; C 1 -C 10 alkoxycarbonyl; phenoxycarbonyl; phenoxycarbonyl substituted with one or more of groups chosen from halo, C 1 -C 6 alkyl or C 1 -C 6 haloalkyl; alkoxyalkoxycarbonyl wherein the number of carbons in the alkoxyalkoxy fragment ranges from 2-10 and the number of oxygens in the alkoxyalkoxy fragment ranges from 2-4; 2-pyridylmethoxycarbonyl; dialkylaminoalkoxycarbonyl wherein the number of carbons in the dialkyl aminoalkoxy fragment ranges from 3-10 and the number of oxygens in the dialkylaminoalkoxy fragment is one; C 1 -C 6 alkenyloxycarbonyl; COON═C(R 1 )(R 2 ) wherein R 1 and R 2 independently represent hydrogen, C 1 -C 8 alkyl or phenyl; unsubstituted, N-C 1 -C 6 alkyl or N,N-di-C 1 -C 6 alkylaminocarbonyl; C 1 -C 10 dialkylaminosulfonyl; formyl; C 1 -C 6 alkylcarbonyl; C 1 -C 6 mono- or polyhaloalkylcarbonyl; phenylcarbonyl; phenylcarbonyl substituted with one or more of groups chosen from halo, C 1 -C 6 alkyl or C 1 -C 6 haloalkyl; or C(R 3 )(R 4 )OR 5 wherein R 3 and R 4 independently represent hydrogen or C 1 -C 6 alkyl and R 5 represents hydrogen, C 1 -C 6 alkyl, benzyl, phenylcarbonyl or C 1 -C 6 alkylcarbonyl; V is H or R; X, Y and Z independently represent hydroxyl, carboxyl, hydrogen, C 1 -C 6 alkyl, C 1 -C 6 mono- or polyhaloalkyl, C 1 -C.sub. 6 alkoxy, C 1 -C 6 mono- or polyhaloalkoxy, phenyl, phenyl substituted with one or more groups chosen from halo, nitro, C 1 -C 6 alkyl or C 1 -C 6 mono- or polyhaloalkyl, C 1 -C 6 alkylthio, halogen, or two adjacent substituents (i.e. X and Y or Y and Z) are joined together to form a saturated five, six or seven-membered saturated cyclic structure of carbon atoms or one carbon atom of X,Y or Y,Z is replaced by a heteroatom chosen from among nitrogen, oxygen or sulfur (i.e. X,Y or Y,Z is --(CH 2 ) n -- wherein n is 3, 4 or 5; or X,Y or Y,Z is --(CH 2 ) n --A--(CH 2 ) m wherein n is 0-4, the value of m is equal to the ring size minus (n+3) and A is NH, O or S) and R represents alkyl, alkenyl, alkynyl, phenylalkyl, acyl, alkoxycarbonyl, phenoxycarbonyl, dialkylaminocarbonyl, alkylsulfonyl, phenylsulfonyl, alkylthiocarbonyl or phenylthiocarbonyl wherein alkyl, alkenyl, alkynyl and alkoxy in each instance have from 1 to 10 carbon atoms.