公开(公告)号：CA2289112A1

公开(公告)日：1998-11-12

申请号：CA2289112

申请日：1998-05-05

Applicant: BASF AG

Inventor： WESTPHALEN KARL-OTTO ,  RACK MICHAEL ,  RHEINHEIMER JOACHIM ,  WITSCHEL MATTHIAS ,  OTTEN MARTINA ,  MISSLITZ ULF ,  MAYER GUIDO ,  WALTER HELMUT ,  ENGEL STEFAN ,  HILL REGINA LUISE ,  KARDORFF UWE ,  DEYN WOLFGANG ,  BAUMANN ERNST

IPC: A01N43/56 ,  A01N43/58 ,  A01N43/76 ,  C07D231/20 ,  C07D401/10 ,  C07D403/10 ,  C07D405/10 ,  C07D409/10 ,  C07D413/10 ,  C07D417/10

Abstract: The invention relates to 4-(3-alkenyl-benzoyl)-pyrazoles of formula (I), wherein the variables can have the following meanings: R1, R2 = hydrogen, nitro, halogen, cyano, rhodano, alkyl, halogen alkane, alkoxyalkyl, alkenyl, alkinyl, -OR6, -OCOR7, -OSO2R7, -SH, -S(O)nR8, -SO2OR6, -SO2NR6R9, -NR9SO2R7 or -NR9COR7; R3 = hydrogen, halogen, alkyl, halogen alkane, alkoxy, alkenyl, alkinyl; R4, R5 = hydrogen, nitro, halogen, cyano, rhodano, alkyl, halogen alkane, cycloalkyl, alkenyl, cycloalkenyl, alkinyl, alkythio, halogen alkoxy, COR10, -CO2R10, -COSR10, -CONR10R11, -C(R12)=NR13, -PO(OR10) (OR11); optionally substituted alkyl, heterocyclyl, heterocyclylalkyl, phenyl, phenylalkyl, hetaryl or hetarylalkyl; or R4 and R5 together form an alkandiyl chain which can be substituted and/or interrupted by a heteroatom; Q = a substituted position 4 bonded pyrazole. The invention further relates to the salts thereof, which can be used in agriculture. The invention also relates to a method for the production of compounds of formula (I), to agents containing said compounds and to the use of said derivatives or agents containing said compounds to control undesired plants.

公开(公告)号：DE59503805D1

公开(公告)日：1998-11-05

申请号：DE59503805

申请日：1995-07-27

Applicant: BASF AG

Inventor： PLATH PETER ,  KARDORFF UWE ,  VON DEYN WOLFGANG ,  ENGEL STEFAN ,  KAST JUERGEN ,  RANG HARALD ,  KOENIG HARTMANN ,  GERBER MATTHIAS ,  WALTER HELMUT ,  WESTPHALEN KARL-OTTO

IPC: C07D275/04 ,  A01N43/80 ,  A01P13/00 ,  C07D275/00 ,  C07D275/06 ,  C07D417/10

Abstract: PCT No. PCT/EP95/02973 Sec. 371 Date Feb. 3, 1997 Sec. 102(e) Date Feb. 3, 1997 PCT Filed Jul. 27, 1995 PCT Pub. No. WO96/05182 PCT Pub. Date Feb. 22, 1996Saccharin derivatives of the formula I I where the substituents have the following meanings: L and M are hydrogen, alkyl, alkoxy, alkylthio, chlorine, cyano, methylsulfonyl, nitro or trifluoromethyl; Z is hydrogen, alkyl, cycloalkyl, alkenyl, alkynyl, acyl, or benzyl or phenyl which are unsubstituted or substituted by halogen or alkyl; J is a 2-linked, unsubstituted or substituted cyclohexane-1,3-dione ring, are described.

公开(公告)号：AU6729498A

公开(公告)日：1998-10-20

申请号：AU6729498

申请日：1998-03-12

Applicant: BASF AG

Inventor： MAYER GUIDO ,  OTTEN MARTINA ,  KARDORFF UWE ,  BAUMANN ERNST ,  DEYN WOLFGANG VON ,  ENGEL STEFAN ,  HILL REGINA LUISE ,  RHEINHEIMER JOACHIM ,  WITSCHEL MATTHIAS ,  GOTZ ROLAND ,  RACK MICHAEL ,  WESTPHALEN KARL-OTTO ,  MISSLITZ ULF ,  WALTER HELMUT

IPC: A01N43/78 ,  A01N47/18 ,  A01N47/22 ,  A01N47/36 ,  A01N57/32 ,  C07D417/04 ,  C07D417/14 ,  C07F9/6558

Abstract: PCT No. PCT/EP98/01442 Sec. 371 Date Sep. 21, 1999 Sec. 102(e) Date Sep. 21, 1999 PCT Filed Mar. 12, 1998 PCT Pub. No. WO98/42703 PCT Pub. Date Oct. 1, 1998Thiazolimine derivatives of the formula I where: X and Y independently of one another are each hydrogen, halogen, C1-C4-alkyl, C1-C4-haloalkyl; Z is hydrogen; Cl-C8-alkyl, C2-C8-alkenyl, C2-C8-alkynyl, C1-C8-alkoxy, C1-C8-alkylthio, it being possible for these groups to be substituted by one to five halogen or C1-C4-alkoxy; aryl, hetaryl, benzyl, it being possible for these groups to be substituted by Cl-C4-alkyl, C1-C4-alkoxy, Cl-C4-haloalkyl, C1-C4-haloalkoxy, halogen, nitro or cyano; or one of the groups below: R1 and R2 are each hydrogen, halogen; C1-C4-alkyl, C2-C4-alkenyl, C2-C4-alkynyl, it being possible for these groups to be substituted by one to five halogens or by C1-C4-alkoxy; n is 1 or 2; m is 0, 1 or 2 R3-R6 are each as defined in the application, and agriculturally useful salts of the compounds I.

公开(公告)号：CA2283981A1

公开(公告)日：1998-10-01

申请号：CA2283981

申请日：1998-03-09

Applicant: BASF AG

Inventor： WALTER HELMUT ,  HAMPRECHT GERHARD ,  SCHAEFER PETER ,  MENGES MARKUS ,  MISSLITZ ULF ,  ZAGAR CYRILL ,  WESTPHALEN KARL-OTTO ,  RACK MICHAEL ,  MENKE OLAF

IPC: A01N43/40 ,  C07D213/61 ,  C07D401/12 ,  C07D405/12

Abstract: Substituted 2-benz(o)ylpyridines of formula (I) and the salts thereof, wherein n = 0, 1; x = CO, CH2, CH(C1-C4-alkyl), CH-OH, CH-CN, CH-halogen, C(halogen)2, CH-CONH2, CH-CO-O(C1-C4-alkyl), CH-O(C1-C4-alkyl), C(CN) (C1-C4-alkyl); R1 = halogen, C1-C4-halogen alkane, C1-C4-alkylthio, C1-C4-alkyl sulfinyl, C1-C4-alkyl sulfonyl; R2 = H, halogen; R3 = H, NO2, OH, halogen, C1-C4-alkoxy; R4 = H, NO2, OH, halogen, C1-C4-alkyl, C1-C4 halogen alkane, C1-C4-alkoxy; R5 = H, NO2, CN, halogen, C1-C8-alkyl, C3-C8-alkenyl,C3-C8-alkinyl, C3-C8-cycloalkyl, C1-C8-halogen alkane, C2-C8-halogen alkenyl, C2-C8-halogen alkane, C1-C4-alkoxy-C1-C4-alkyl, C2-C4-alkenyloxy-C1-C4-alkyl, C2-C4-alkinyloxy-C1-C4-alkyl, C1-C4-alkylthio-C1-C4-alkyl, C1-C4-alkylsulfinyl-C1-C4-alkyl, C1-C4-alkylsulfonyl-C1-C4-alkyl, cyano-C1-C8-alkyl, cyano-C2-C8-alkenyl, cyano-C3-C8-alkinyl, optionally substituted OH, SH, SO-H, -SO2-H, COOH or NH-COOH, -SO2Cl, -N(R9, R10), -NH-SO2-(C1-C8-alkyl), -N¢-SO2-(C1-C8-alkyl)!2, -N(C1-C8-alkyl) ¢SO2-(C1-C8-alkyl)!, -SO2-N(R9, R10), -O-CO-NH-R9, optionally substituted CHO, O-CHO or -NH-CHO, NH-CO-NH-R9, -O-CS-NH2, -OCS-N(C1-C8-alkyl)2, -CO-N(R9, R10), -CS-N (R9, R10), -CO-NH-SO2-(C1-C4-alkyl), -CO-N(C1-C4-alkyl), -SO2-(C1-C4-alkyl), hydroxycarbonyl-C1-C8-alkyl, (C1-C8-alkoxy)carbonyl-C1-C6-alkyl, CH2-CH(halogen)-CO-N(R9, R10), -CH2-CH(halogen)-CN, -CH2-CH(halogen)-CO-(C1-C4-alkyl), optionally substituted -CH2-CH(halogen-COOH, -CH=C(halogen)-COOH or CH=C(C1-C4-alkyl)-COOH, optionally substituted -CH=N-OH or -CH(-Y-R15, -Z-R15), (II) or (III); R9, R10 = H, C1-C8-alkyl, C3-C8-cycloalkyl, C2-C8-alkenyl, C3-C8-alkinyl, C1-C8-halogen alkane, C1-C4-alkoxy-C1-C4-alkyl, C1-C4-alkylthio-C1-C4-alkyl, C1-C4-alkylsulfinyl-C1-C4-alkyl, C1-C4-alkylsulfonyl-C1-C4-alkyl, cyano-C1-C8-alkyl, hydroxycarbonyl-C1-C4-alkyl, (C1-C4-alkoxy)carbonyl-C1-C4-alkyl, (C3-C6-cycloalkoxy)carbonyl-C1-C4-alkyl, (C1-C4-alkoxy)carbonyl-C3-C7-cycloalkyl, C1-C4-alkoxy-(C1-C4)alkoxy)-carbonyl-C1-C4-alkyl, C1-C6-alkoxy, optionally substituted phenyl or phenyl-C1-C4-alkyl or R9 + R10 together = optionally substituted tetramethylene, pentamethylene or ethylene oxyethylene chain; Y, Z = O, S; R15 = C1-C8-alkyl, C1-C8 halogen alkane, C1-C4-alkoxy-C1-C4-alkyl; R16-R21 = H, CN, C1-C8-alkyl, C1-C4-alkoxy-C1-C4-alkyl, C1-C8-alkoxy, C1-C4-alkoxy-C1-C4-alkoxy, COOH, (C1-C8-alkoxy)carbonyl, CONH2, (C1-C8-alkyl)aminocarbonyl, di(C1-C8-alkyl)aminocarbonyl; R6 = H, NO2, halogen, optionally substituted OH or COOH; R7 = H, NO2, halogen, optionally substituted OH; excluding those compounds in (I) in wherein X = CH2 and R5 = optionally substituted OH as well as R3, R7 = H or R1 = halogen as well as R3, R4, R6, R7 = H. The invention further relates to the use of said substances as herbicides and for dessication/defoliation of plants.

公开(公告)号：CA2283672A1

公开(公告)日：1998-10-01

申请号：CA2283672

申请日：1998-03-12

Applicant: BASF AG

Inventor： ZAGAR CYRILL ,  SCHAEFER PETER ,  MENKE OLAF ,  REINHARD ROBERT ,  WALTER HELMUT ,  HAMPRECHT GERHARD ,  MISSLITZ ULF ,  MENGES MARKUS ,  WESTPHALEN KARL-OTTO

IPC: A01N43/54 ,  C07C251/48 ,  C07C265/12 ,  C07D239/54 ,  C07D239/56

Abstract: The invention relates to novel hydroximic acid derivatives of formula (I) and their salts, wherein X = O, S; Y = O, S; R1 = H, C1-C4-alkyl, NH2, C1-C4-alkylamino or di(C1-C4-alkyl)amino; R2 = C1-C3-halogenalkyl; R3 = H, halogen, C1-C4-alkyl; R4 = H, halogen; R5 = CN, halogen; R6 = C1-C6-alkyl, C2-C6-alkenyl, C3-C6-alkinyl or phenyl-C1-C6-alkyl, wherein the phenyl ring of this group can be unsubstituted or can carry 1-3 substituents; R7 = a C1-C6-alkyl, C2-C6-alkenyl, C3-C6-alkinyl or phenyl-C1-C6-alkyl group, wherein these four groups can be unsubstituted or can carry one or two substituents. The inventive derivatives can be used as herbicides, and in dessication/defoliation of plants.

公开(公告)号：BG102340A

公开(公告)日：1998-08-31

申请号：BG10234098

申请日：1998-03-20

Applicant: BASF AG

Inventor： LANDES MAX ,  SIEVERNICH BERND ,  KIBLER ELMAR ,  NUYKEN WESSEL ,  WALTER HELMUT ,  WESIPHALEN KARL-OTTO ,  MAYER HORST ,  HADEN EGON ,  MULDER CHRISTIAAN ,  SCHOENHAMMER ALFONS ,  HAMPRECHT GERHARD

IPC: A01N47/36

Abstract: The invention relates to herbicide mixture containing atleast one derivative of sulphonurea having the formulawhere R1 is C1-C5 alkyl, methoxy, ethoxy, SO2CH3, cyano, chloro,fluoro, SCH3, S(0)CH3, halogen, ER6 group where E means 0, S orNR7, COOR8, NO2, S(0)oR9, SO2NR1OR11, CONR1OR11; R2 is hydrogen,C1-C4 alkyl, C2-C4 alkeynyl, halogen, C1-C4 alkoxy, C1-C4halogenalkoxy, C1-C4 halogenalkyl, C1-C2 alkylsulphonyl group,nitro, cyano or C1-C4 alkylthio; R3 means R, CF3, CF2Cl, CF2H,OCF3, OCF2Cl, or provided that R1 is CO2CH3 and simultaneously R2is fluoro, Cl, or provided that R1 is CH2CF3 or CF2CF3, it meansmethyl, or when R4 is OCF3 or OCF2Cl it means OCF2H or OCF2Br; R4is C1-C2 alkoxy, C1-C2 alkyl, C1-C2 alkylthio, C1-C2 alkylamino,Di-C1-C2 alkylamino, halogen, C1-C2 halogenalkyl, C1-C2halogenalkoxy; R5 is hydrogen, C1-C2 alkoxy, C1-C4 alkyl, R6 isC1-C4 alkyl, C2-C4 alkenyl, C2-C4 alkynyl or C3-C6 cycloalkylwhich can have 1 to 5 halogen atoms with the exception of alyl,difluoromethoxy, chlorodifluoromethoxy and 2-chloroethoxy,provided that E means 0 or S, and when E is 0 or NR7, R6 alsomeans methylsulphonyl, ethylsulphonyl, trifluoromethylsulphonyl,alylsulphonyl, propargylsulphonyl or dimethyl sulphamoyl; R7 ishydrogen, methyl or ethyl; R8 is C1-C6 alkyl group which can haveup to three of the following residues: halogen, C1-C4 alkoxy,C1-C4 alkylthio, C1-C4 halogenalkoxy, C1-C4 alkoxy-C1-C2-alkoxy,C3-C7 cycloalkyl and/or phenyl, C5-C7 cycloalkyl group which hasup to three C1-C4 alkyl grlups, C3-C6 alkenyl or C3-C6 alkynyl; R9is C1-C6 alkyl group substituted with halogen, C1-C4 alkoxy, C-C4alkylthio, C1-C4 halogenalkoxy, C1-C4-alkoxy-C1-C2-alkoxy, C3-C7cycloalkyl and/or phenyl, C5-C7 cycloalkyl group with one to threeC1-C4 alkyl groups, C2-C6 alkenyl group or C3-C6 alkynyl group;R10 is hydrogen, C1-C2 alkoxygroup, C1-C6 alkyl group or togetherwith R11 it means C4-C6 alkylene chain where one methylene groupcan be substituted with oxygen atom or with C1-C4 alkylaminogroup, R11 is C1-C4 alkyl group with one to four halogen or C1-C4alkyoxyresidues, C3-C6 cycloalkyl, n is from 0 to 3, 0 is 1-2, Zis N, CH. The invention also relates to salts of the compound.13 claims

公开(公告)号：BG102184A

公开(公告)日：1998-08-31

申请号：BG10218498

申请日：1998-01-14

Applicant: BASF AG

Inventor： MENKE OLAF ,  KLINTZ RALF ,  HAMPRECHT GERHARD ,  HEISTRACHER ELISABETH ,  SCHAEFER PETER ,  ZAGAR CYRILL ,  GOETZ NORBERT ,  WESTPHALEN KARL-OTTO ,  MISSLITZ ULF ,  WALTER HELMUT

IPC: A01N43/54 ,  C07C275/24 ,  C07C281/02 ,  C07C281/06 ,  C07D239/54 ,  C07D413/12 ,  C07D419/12

Abstract: The invention relates to 1-amino-3-benzyluracils and to theirsalts finding application as herbicides, for desiccation anddefoliation of plants. The compounds have the formulawhere R1 is halogen, R2 & R3 are H, CN, SCH, halogen, C1-C4halogenalkyl, C1-C4 halogenalkoxy or C1-C4 halogenalkylthio, R4matches R3 and can include C1-C4 alkyl, C1-C4 alkyl, C1-C4 alkoxy,C1-C4-alkyl-NHCO-, R5 is H, CN, NO2, OH, halogen, optionallysubstituted NH2, optionally substituted C1-C6 halogenalkoxy, C1-C6halogenalkylthio, C1-C4 alkoxy, C1-C6 alkylthio, C3-C8cycloalkoxy, C3-C8 cycloalkylthio, C3-C6 alkenyloxy, C3-C6alkyenylthio, C3-C6 alkynyloxy, C3-C6 alkynylthio,C1-C6-alkyl-COO, C1-C6-alkyl-COS-, C3-C6-alkenyl-COO,C3-C6-alkenyl-COS, C3-C6-alkynyl-COO-, C3-C6-alkynyl COS-, C1-C6alkyl-SO2-0- or C1-C6-alkyl-SO2, R6 is H, OH, SH, halogen, C1-C6halogenalkoxy, C1-C6 halogen alkylthio,C1-C6-alkylthio-(C1-C6-alkyl)carbonyl, (C1-C6)iminooxy-CO-;optionally substituted C1-C6 alkoxy, C1-C6 alkylthio, C3-C8cyloalkoxy, C3-C8 cycloalkylthio, C2-C6 alkenyloxy, C2-C6alkenylthio, C2-C6 alkynyloxy, C2-C6 alkynyilthio,C1-C6-alkyl-COO-, C2-C6-alkyl-COS-, C1-C6-alkoxy-COO-,C2-C6-alkyenyl-COO-, C2-C6-alkyenyl-COS-, C2-C6 alkynyl-COO-,C2-C6-alkynyl-COS-, 1-C6-SO2-0-, or C1-C6-alkyl-SO2; -CY-R11 {Y =-O-, -S-, optionally substituted -NH-}, -C-(R11)(Z1R12)(Z2R13)[{Z1and Z2 = -O-, -S-}, -C(R11 = C(R14)-CN, -C(R11) = C(R14)-CO-R15,-CH(R11)-CH(R12)-CO-R15, -C(R11) = C(R14)-CH2-CO-R15,-C(R11)=C(R14)-C(R16)=C(R17)-CO-R15-C(R11)=C(R14)-CH2-CH(R18)-CO-R15, -CO-OR19, -CO-SR19,-CO-N(R19)-OR20, -C=C-CO-NH-OR20,-C=C-CO-N(R19)-OR20,-C=C-CS-NH-OR20, -C=C-CS-N(R19)-OR20, -C(R11)=C(R14)-CO-NH-OR20,-C(R11)=C(R14)-CO-N(R19)-OR20, -C(R11)=C(R14)-CS-NH-OR20,-C(R11)=C(R14)-CS-N(R19)-OR20, -C(R11)=C(R14)-C(R21)=N-OR20,-C(R21)-N-OR20, -C=C-C(R21)=N-OR20, -C(Z1R12)(Z2R13)-OR19,-C(Z1R12) (Z2R13), -C(Z1R12)(Z2R13)-N(R23)R24, optionallysubstituted amino or -CONH2, azaheterocyclyl, -CO-azaheterocyclyl,or a chain containing (N + O or N + O + S) heterocyclyl.14 claims

公开(公告)号：ZA971503B

公开(公告)日：1998-08-21

申请号：ZA971503

申请日：1997-02-21

Applicant: BASF AG

Inventor： OTTEN MARTINA ,  DEYN WOLFGANG VON ,  ENGEL STEFAN ,  HILL REGINA LUISE ,  KARDORFF UWE ,  VOSSEN MARCUS ,  PLATH PETER ,  WALTER HELMUT ,  WESTPHALEN KARL-OTTO ,  MISSLITZ ULF

IPC: A01N43/32 ,  C07D327/06 ,  C07D339/08 ,  C07D ,  A01N

公开(公告)号：AU6092998A

公开(公告)日：1998-08-07

申请号：AU6092998

申请日：1998-01-08

Applicant: BASF AG

Inventor： DEYN WOLFGANG VON ,  HILL REGINA LUISE ,  KARDORFF UWE ,  BAUMANN ERNST ,  ENGEL STEFAN ,  MAYER GUIDO ,  WITSCHEL MATTHIAS ,  RACK MICHAEL ,  GOTZ NORBERT ,  GEBHARDT JOACHIM ,  MISSLITZ ULF ,  WALTER HELMUT ,  WESTPHALEN KARL-OTTO ,  OTTEN MARTINA ,  RHEINHEIMER JOACHIM

IPC: C07D277/10 ,  A01N43/72 ,  A01N43/76 ,  A01N43/78 ,  A01N43/80 ,  C07D231/20 ,  C07D237/00 ,  C07D261/00 ,  C07D261/04 ,  C07D261/20 ,  C07D263/10 ,  C07D273/00 ,  C07D277/20 ,  C07D277/34 ,  C07D291/04 ,  C07D311/00 ,  C07D403/10 ,  C07D413/10 ,  C07D417/10 ,  C07D419/10 ,  C07D498/10

Abstract: Benzoyl derivatives of the formula I where the variables have the following meanings: R1, R2 are hydrogen, nitro, halogen, cyano, alkyl, haloalkyl, alkoxy, haloalkoxy, alkylthio, haloalkylthio, alkylsulfinyl, haloalkylsulfinyl, alkylsulfonyl or C1-C6-haloalkylsulfonyl; R3 is hydrogen, halogen or alkyl; R4, R5 are hydrogen, halogen, cyano, nitro, alkyl, alkoxy, alkylthio, dialkylamino, phenyl or carbonyl, it being possible for the 6 last-mentioned radicals to be substituted; X is O, S, NR9, CO or CR10R11; Y is O, S, NR12, CO or CR13R14; R15 is pyrazole which is unsubstituted or substituted, linked in the 4-position and has attached to it in the 5-position a hydroxyl or sulfonyloxy radical; and the agriculturally useful salts thereof; processes and intermediates for the preparation of the 3-heterocyclyl-substituted benzoyl derivatives; compositions comprising them; and the use of these derivatives or compositions comprising them for controlling undesirable plants.

公开(公告)号：PL325638A1

公开(公告)日：1998-08-03

申请号：PL32563896

申请日：1996-09-09

Applicant: BASF AG

Inventor： SCHAEFER PETER ,  HAMPRECHT GERHARD ,  HEISTRACHER ELISABETH ,  MENKE OLAF ,  ZAGAR CYRILL ,  RACK MICHAEL ,  GOETZ NORBERT ,  HARREUS ALBRECHT ,  WESTPHALEN KARL-OTTO ,  WALTER HELMUT ,  MISSLITZ ULF

IPC: C07D213/55 ,  A01N43/40 ,  C07D213/26 ,  C07D213/61

Abstract: PCT No. PCT/EP96/03949 Sec. 371 Date Mar. 13, 1998 Sec. 102(e) Date Mar. 13, 1998 PCT Filed Sep. 9, 1996 PCT Pub. No. WO97/11059 PCT Pub. Date Mar. 27, 1997Substituted 2-phenylpyridines I and their salts where n=0, 1; R1=halogen, C1-C4-haloalkyl; R2 and R3=H, halogen; R4=CN, halogen; R5=-CO-O-(C1-C4-alkylene)-CO-OR6, -CO-O-(C1-C4-alkylene)-CO-N(R7)R8, -O-(C1-C4-alkylene)-CO-O-(C1-C4-alkylene)-CO-OR6, -O-(C1-C4-alkylene)-CO-O-(C1-C4-alkylene)-CO-N(R7) R8, -S-(C1-C4-alkylene)-CO-O-(C1-C4-alkylene)-CO-OR6 or -S-(C1-C4-alkylene)-CO-O-(C1-C4-alkylene)-CO-N(R7)R8; R6=H, C1-C4-alkyl, C1-C4-alkoxy-C1-C4-alkyl, C2-C4-alkenyl, C3-C4-alkynyl; R7=H, C1-C4-alkyl, carboxy-C1-C4-alkyl, C1-C4-alkoxycarbonyl-C1-C4-alkyl; R8=H or C1-C4-alkyl, are used as herbicides and for the desiccation/defoliation of plants.