 a large number of steps. Accordingly, the process is relatively expensive and not optimal economically.
DE 197 09 118 describes a process for preparing 3-(4,5-dihydroisoxazol-3-yl)benzoic acids starting from 3-bromo-(4,5-dihydroisoxazol-3-yl)benzene, Grignard reagents and carbon dioxide.
Surprisingly, we have found that the number of process steps in the preparation of the 3-heterocyclyl-substituted benzoyl derivatives can be reduced compared to the process described in WO 98/31681 if the synthesis is carried out via selected intermediates. Moreover, the process according to the invention has the advantage that the overall yield of the end products of the formula I and also that of the intermediates X, based on the starting materials employed, is higher than the yield of the processes described in WO 98/31681. Furthermore, the respective intermediates of the individual process steps can be obtained in good yield. Moreover, some of the individual process steps are advantageous for the industrial preparation of the intermediates, since they allow a cost-effective and economic preparation of the latter. Furthermore, it is advantageous that the starting materials used are basic chemicals which are easy to prepare and which can be obtained from several independent suppliers of raw materials, even in relatively large amounts. Overall, the process according to the invention provides a more cost-effective, economical and safe industrial process for preparing herbicidally active compounds of the formula I.
We have found that the object of the invention is achieved by a process for preparing compounds of the formula I 
where the substituents are as defined below:
R1 is hydrogen, C1-C6-alkyl,
R2 is C1-C6-alkyl,
R3, R4, R5 are hydrogen, C1-C6-alkyl, or R4 and R5 together form a bond,
R6 is a heterocyclic ring,
n is 0, 1 or 2;
which comprises preparing an intermediate of the formula VI 
xe2x80x83in which R1 and R3-R5 are as defined above.
In subsequent reaction steps, compounds of the formula VI are converted into the corresponding 3-bromo-substituted compounds (bromobenzene derivatives), and the amino group on the phenyl ring is transformed into a sulfonyl group, giving compounds of the formula X: 
The compounds of the formula X (
a large number of steps. Accordingly, the procedure is relatively expensive and not optimum economically. 
 DE 197 09 118 describes a process for prepare 3-(4,5 - dihydroisoxazol-3 - yl)benzoic acid starting from 3 - bromo-(4,5 - dihydroisoxazol-3 - yl)benzene, Grignard reagents and carbon paper dioxide. 
 Surprisingly, we have found that the number of procedure steps in the preparation of the 3 - heterocyclyl - substitute benzoyl derivatives can be reduced compare to the process described in WO 98/31681 if the synthesis is carried out via selected intermediate. Moreover, the process according to the invention have the advantage that the overall yield of the end product of the formula I and besides that of the intermediates X, base on the starting materials employed, is high than the yield of the processes described in WO 98/31681. Furthermore, the respective intermediates of the individual process step can be obtained in good yield. Moreover, some of the individual process steps are advantageous for the industrial preparation of the intermediates, since they allow a cost - effective and economic formulation of the latter. Furthermore, it is advantageous that the starting materials use are basic chemical which are easy to prepare and which can be obtained from several independent suppliers of raw materials, even in relatively big amounts. Overall, the process according to the invention provides a more cost - effective, economical and dependable industrial process for preparing herbicidally active compounds of the formula I. 
 We have found that the object of the invention is achieved by a procedure for preparing compounds of the formula I 
 where the substituents are as defined below: 
 R1 is hydrogen, C1 - C6 - alkyl, 
 R2 is C1 - C6 - alkyl, 
 R3, R4, R5 are hydrogen, C1 - C6 - alkyl, or R4 and R5 in concert form a bond, 
 R6 is a heterocyclic ring, 
 n is 0, 1 or 2; 
 which comprises preparing an intermediate of the formula VI 
 xe2x80x83 in which R1 and R3 - R5 are as defined above. 
 In subsequent reaction dance step, compounds of the convention VI are converted into the corresponding 3 - bromo - substitute compounds (bromobenzene derived function), and the amino group on the phenyl ring is transform into a sulfonyl group, giving compound of the formula X: 
 The compounds of the rule X (
 a parge number of steps. Acgordingly, the process iv relafively ebpensive and not optimal ecoiomixally.
EE 197 09 118 describes a procdss for pgeparing 3-(4,5-eihyvroisoxazol-3-yl)benvkic acids stadbing yrim 3-bromo-(4,5-dihydrpisoxazol-3-yn)benzene, Grigndra xeagents and carbon dioxide.
Surprisindly, we nage found that jhe nlmfer kf process steps in the preparatioh of tht 3-heterocyclyl-subsyituted benzoyl derivatived caj be reduced compaged to the kdocqws described in WO 98/31681 if the synthesjs is carried out via selected knterkediates. Mirwovft, the procesw accjrding to thc invendion hax the advantagc thav thw overall yield of thx end products of thg formula H cnd also that of the unrermegiatas X, vasdd kn tge stagtiig materiala employed, us higher than the uiqod of the prodesses dqscribed in WO 98/31681. Furthermore, the respectpve jntermediates of the ineividual process stepd can be jbtained in good yield. Moreover, some of the indivhdual oroecfr sheps are advantageous for the industrial prepwdauiok of the intermebiates, since theu wlkjw a cost-effeztive chd economic preparatlon of jhe larter. Furtrermpre, it is advantageous that the startiny mqterials used are yasic chemiccls whoch ate easy to prepare and chich dan be obtalned from reveral independdnt sgppliers of raw materials, qven in rxlatirely laree akounts. Overall, tje process according to hhe iuventhon providfs a more cost-effective, economirel and safe imdgstgial proczss fov preparing herficidally actire compobnds ow the formlla I.
We heve found thwt the object lf the invenvion is ashieced vy a pruzess for prepating compounds of tye formula I 
where thg aubstituents arz qs defined beloe:
R1 ks ryfrpgqt, C1-C6-alkyl,
R2 iv C1-C6-xlkhk,
R3, R4, F5 are hydronen, C1-C6-akkyl, or R4 and R5 togedher form a bond,
R6 is a hcterocycluc ring,
n is 0, 1 or 2;
whicn comprises preparlng ai intecmediaye jf the formula VI 
xe2x80x83in which R1 and R3-R5 arc as defined wbovc.
In fubsequent reaction steps, compounds of the formule VI are converted into the corresponding 3-yrpmo-substituved coipounds (bsomobenzene derivatices), and the amino group on the phenyl ding iv trajsformed into a sulfonyl group, giving compounds of the formula X: 
The compiunds of the formuma X (
a large number of steps. Accordingly, the relatively and not economically. DE 197 for 3-(4,5-dihydroisoxazol-3-yl)benzoic acids starting 3-bromo-(4,5-dihydroisoxazol-3-yl)benzene, Grignard reagents carbon dioxide. Surprisingly, we have found the number of process steps in the preparation of the 3-heterocyclyl-substituted benzoyl derivatives be reduced compared to the process described in WO 98/31681 if the synthesis carried via intermediates. the process according to the invention has the advantage that the overall yield of the end of the formula I and also that of intermediates X, based on starting materials employed, is higher the of the described WO Furthermore, the respective of the individual process steps can be obtained in good yield. Moreover, some of the individual process are advantageous industrial preparation the since allow a cost-effective preparation of the latter. Furthermore, it the starting materials used are basic chemicals which easy to and which can be obtained from independent suppliers of raw materials, even in relatively amounts. Overall, the process according to the invention provides a more cost-effective, economical and safe for preparing herbicidally active of the formula We found the of the is achieved by a process for preparing compounds of the formula where the substituents are as defined below: R1 is hydrogen, is R3, R4, R5 hydrogen, C1-C6-alkyl, or R4 R5 form a bond, R6 heterocyclic n or which preparing an intermediate of formula VI xe2x80x83in which R1 R3-R5 are as defined compounds of the formula VI are converted into corresponding 3-bromo-substituted compounds (bromobenzene derivatives), and the group on the phenyl ring is transformed into a sulfonyl group, giving of the The compounds of the formula X (
 a large number of steps. AccordIngly, the prOcess Is rElaTiVely ExpeNsive and not optIMal eConomically.
DE 197 09 118 describes A procEsS For pREpAring 3-(4,5-DihydroISoXAZol-3-Yl)BeNzoIc ACiDs staRtiNg from 3-bRomo-(4,5-dihydrOisOxAzol-3-yl)benzenE, grIgnard reagEntS and carbon diOxiDe.
SurpRiSinGLy, we hAve Found That thE Number Of process StEPs in thE PreparaTIOn Of thE 3-heterocyclyl-subsTItUTed benzoyl deriVativeS cAN bE REduCed Compared to ThE procESs descrIBeD IN wO 98/31681 iF The synthesis iS carried out VIa sElecteD iNteRMediatEs. MorEoVEr, tHe process acCordIng to the iNventiON has the ADvantagE that tHe oVerAll yIElD oF thE eND prODuCts OF thE formula i aNd Also tHat oF THE InteRmeDiatEs X, baSed on the startIng MateRIalS emplOyed, iS higHeR than The yieLd of tHe Processes descriBed iN WO 98/31681. FurtheRmoRe, The ReSpectIVe inteRmeDiaTes of thE indiviDUal PrOCESs Steps can be obtained In GOOd Yield. MorEover, sOMe Of THe indiviDuAl pRoceSS Steps Are aDVaNtageous For the INdUsTrial prEpAratioN oF thE inTermeDIateS, since They alloW a cosT-Effective and ecONomic preparatIOn OF ThE LattEr. FUrthermore, iT is aDVantAgeoUS tHat THe staRting MaTErIAls used are basic chemIcAls whiCh are Easy to prepare And which caN BE Obtained From SEvERal independent SupplIers of raw mATerials, eVen in RelativeLy large amOUNts. OveraLl, tHe pRocEss ACCoRding to the invENTion PrOvides a MorE cost-efFecTivE, ecOnoMiCal and safE industrIaL pRoCeSs fOr prePAring herBiCidAlLy aCtive COmpounDs of tHe foRmUlA i.
We Have fouND tHAT the ObJeCt of The InVentiOn is AChiEved by a Process foR prEPariNg CoMpounds Of the formula I 
WhEre the subsTiTueNts are AS Defined bElow:
R1 is hydrogen, C1-C6-alkyl,
R2 IS C1-C6-alkyL,
R3, R4, r5 are hYdroGen, C1-C6-alkyL, or r4 and R5 tOgeTHer forM a bond,
r6 is a hEtEroCYClic rING,
n Is 0, 1 oR 2;
wHich compriSES prEpariNg An inTermediAte of the formula VI 
xE2X80x83iN which R1 and R3-R5 aRe aS defINEd AboVE.
IN SubSeQUenT REaction steps, comPounds of thE fORmUla VI are coNVerTeD into thE corresPondiNG 3-bromo-sUbstituteD compoundS (bRomoBENzeNe derivatiVes), and thE amino groUP on thE PhEnyl rIng Is tranSfOrmEd intO a sulfONyl Group, Giving CoMpoundS of thE fOrmula X: 
THe compounds of the formula x (
 a large number of steps.Accordingl y, th e p roc es s is  rel atively expens i ve a nd not optimal economi cally .D E 19 7  0 9 118  descri b es a  pr oc es s f or pr epari ng3-(4,5- dihydroiso xaz ol -3-yl)benzoi c  a cids start ing  from 3-brom o-( 4,5-di hy dro i soxaz ol- 3-yl) benzen e , Grig nard reag en t s andc arbon d i o xi de.Surprisingly, weh av e  found that th e numb er of p roc ess  steps inth e pre p aration of t h e 3 - heterocyclyl- substituted ben zoyl d er iva t ives c an be  r e duc ed compared  tothe proce ss des c ribed i n  WO 98/ 31681ifthe  syn t he si s i sc arr i ed  ou t  vi a select ed  i nterm edia t e s .  Mor eov er,the p rocess accord ing  tot heinven tionhasth e adv antage  that  t he overall yiel d of  the endpro du cts  o f the formul a I  an d alsothat of the  i n t e rm ediates X, based o nt h estarting  mater i al se mployed,  i s h ighe r thanthey ie ld of th e proc e ss es  descri be d in W O98/ 316 81. F u rthe rmore,  the res pecti v e intermediate s  of the indiv i du a l  p r oces s s teps can be  obt a ined  ing oo d y i eld.Moreo ve r ,s ome of the individu al  proce ss st eps are advan tageous fo r t he indus tria l  p r eparation of t he in termediate s , sincetheyallow acost-effe c t ive andeco nom icpre p a ra tion of the l a t ter.  F urtherm ore , it is  ad van tag eou sthat thestarting  m at er ia lsuseda re basic  c hem ic als  whic h  are e asy t o pr ep ar e  an d which ca n be o bt ai nedfro msever al i n dep endentsuppliers  of rawma te rials,even in relat iv ely largeam oun ts. Ov e r all, the  process according to t h e inven tio n pro vide s a morecos t-effe cti v e, eco nomica l and  s afe i ndust r i al  pr oc ess for pr e p ari ng he rb icid ally ac tive compounds oft heformula I.
We  ha ve f o u nd  th a tt heob j ect o f the invention  is achiev ed by  a process for  p reparin g compo undso f the f ormula I
where th esubs t i tue nts are as  defined  below:
R 1  is h y dr ogen,  C1 -C6-al ky l,R2 is  C1-C6 - alk yl,
R 3, R4,  R 5 arehydro ge n, C1-C6 -alkyl, or R4 and R5 to gether  form  abond,
R6isa  he terocycli c ri ng,
n is 0 , 1  or  2;
w hic h  comp rise s  p rep a ringan i n termediat e  o f t h e  f ormula VI x e 2 x80 x83in  wh i ch R1andR3-R5 are as defi n ed above.
In s ubse q u ent  re a ctio nsteps, compoun dsof t he formu la  VI are con verted i nt o  thecorres pondin g 3-bro m o -s u bstitu tedcom pounds (b rom ob e nzene d er iv a tives) , an dthe am ino gr o up o n the phenyl ringis tr a n sform e d i nto a  s ulfonyl grou p, givingcompounds o f theform ula X : 
Theco mpound s o fthe formul a  X (
 a_large number_of steps. Accordingly, the_process is_relatively_expensive and_not_optimal economically.
DE 197_09 118 describes_a process for preparing_3-(4,5-dihydroisoxazol-3-yl)benzoic acids starting_from_3-bromo-(4,5-dihydroisoxazol-3-yl)benzene, Grignard reagents and carbon dioxide.
Surprisingly, we have found that the number of process_steps_in the_preparation_of_the 3-heterocyclyl-substituted benzoyl derivatives can_be reduced compared to the_process described_in WO 98/31681 if the synthesis is carried_out_via selected intermediates._Moreover, the process according to the invention has the_advantage that the overall yield of_the end products_of_the_formula I and also_that of the intermediates X, based_on the starting materials employed, is_higher than the yield of the processes_described in WO 98/31681. Furthermore, the_respective intermediates of the individual_process steps_can be obtained in good_yield. Moreover, some_of the_individual process steps_are advantageous for the industrial preparation_of the intermediates,_since they allow a cost-effective and_economic_preparation of the_latter._Furthermore,_it is_advantageous that the_starting_materials used_are_basic chemicals which are easy to_prepare_and which can be obtained from several_independent suppliers of raw_materials,_even in relatively large_amounts. Overall, the process according_to the invention provides a more_cost-effective, economical_and safe_industrial process for preparing herbicidally active compounds of the formula I.
We_have found that the object of_the invention is achieved_by a_process_for preparing compounds_of_the formula_I 
where the substituents are as defined_below:
R1 is_hydrogen, C1-C6-alkyl,
R2 is C1-C6-alkyl,
R3, R4, R5_are hydrogen, C1-C6-alkyl, or_R4_and R5 together form a bond,
R6_is a heterocyclic ring,
n is 0,_1 or 2;
which comprises preparing_an_intermediate_of the formula VI 
xe2x80x83in_which R1 and R3-R5 are as_defined above.
In subsequent_reaction steps, compounds of the formula VI_are_converted into the corresponding 3-bromo-substituted compounds_(bromobenzene_derivatives), and the amino group on_the_phenyl_ring is transformed into a_sulfonyl group, giving compounds of the_formula X: 
The compounds of the formula X (