 acetoacetic acid ester from 4-methylene-2-oxetanone by an alcoholysis reaction followed by asymmetric reduction. This method therefore involves many steps and is complicated. The method (d) succeeds in solving the aforementioned problems involved in the methods (a) to (c) but involves some problems; it has a low catalytic activity and requires long reaction time. Moreover, the optical purity of the resulting product produced in this method is as low as 70-92% e.e. This method has been improved as reported in JP-A No. H6-128245, H7-188201 and H7-206885. However, this method is not an industrially satisfactory method on account of its low catalytic activity. Gas insulated high voltage circuit breakers are typically located at high voltages electrical distribution sub-stations that generate strong electromagnetic radiation. A common high voltage circuit breaker is the three-pole circuit breaker shown in FIGS. 1 and 2. As depicted, the high voltage circuit breaker 10 typically includes three horizontal circuit breakers 12 coupled together with a base housing 16. Each of the horizontal circuit breakers 12 comprises a tank 14 secured in the housing 16, first and second current transformers 20 and 21 extending from each tank 14 and exit and entrance insulators 18 and 19 extending from the first and second current transformers 20 and 21. The housing 16 is mountable on a support frame 40.
Presently in a circuit breaker of this size, the breaker controls are wired to a cabinet or control panel 30 which is rigidly connected to the housing 16 or the breaker 12 itself at a height reachable by an operator O or other personnel on the ground and well below the height of the live parts of the breaker 10. Because of the total height H extending from the base of the control panel 30 to the top of the highest extending insulators 18 and 19 tends to be greater than the maximum height restrictions on highways, the control panel 30 and its bushings are typically removed for shipment from factory to the customer. As a result, field installation of wiring and bushings are required, as well as the cleaning and inspection of the breaker interior and vacuum treatment, before breaker use. Such installation is time consuming and costly, typically requiring five days for a utility crew and one manufacturer's technician to install the breaker 10 at the customer's site.
It is desirable to provide a circuit breaker and control panel assembly that facilitates shipping and reduces the complexity of the field
acetoacetic acid ester from 4 - methylene-2 - oxetanone by an alcoholysis reaction followed by asymmetric reduction. This method acting consequently involve many steps and is complicated. The method (five hundred) succeeds in solving the aforementioned problem involved in the methods (a) to (coke) but involves some problems; it suffer a low catalytic bodily process and command long reaction time. Moreover, the optical honor of the resulting product produced in this method acting is as low as 70 - 92% e.e. This method has been improved as reported in JP - angstrom No. H6 - 128245, H7 - 188201 and H7 - 206885. However, this method is not an industrially satisfactory method on account of its low catalytic natural process. Gas insulated high voltage circuit breakers are typically located at high voltages electrical distribution sub - stations that generate strong electromagnetic radiation. A common high electric potential tour breaker is the three - terminal circuit breaker shown in FIGS. 1 and 2. As depicted, the eminent voltage circuit breaker 10 typically includes three horizontal racing circuit breakers 12 coupled together with a base housing 16. Each of the horizontal circuit breaker 12 comprises a tank 14 secured in the housing 16, inaugural and second current transformers 20 and 21 extend from each tank 14 and exit and entrance insulators 18 and 19 extending from the first and second current transformer 20 and 21. The housing 16 is mountable on a support frame 40. 
 Presently in a circuit breaker of this size, the breaker controls are wired to a cabinet or command panel 30 which is rigidly connect to the housing 16 or the surf 12 itself at a height approachable by an operator O or other personnel on the ground and well below the altitude of the live parts of the circuit breaker 10. Because of the total acme H gallop from the base of the control panel 30 to the top of the high extending insulators 18 and 19 tends to be great than the maximum height restrictions on highways, the control panel 30 and its bushing are typically removed for shipment from factory to the customer. As a result, field installation of wiring and bushings are necessitate, equally well as the cleaning and inspection of the breaker interior and vacuum treatment, before breaker use. Such installation is time consuming and dearly-won, typically requiring five days for a utility crew and one manufacturer's technician to install the breaker 10 at the customer's site. 
 It is desirable to provide a circuit breaker and control control panel assembly that facilitates shipping and repress the complexity of the field
 acftoacetic acid ester froo 4-methylene-2-oxetcbone bb an aldoholysir reaction followed by asymmxtrix redyction. This method thefefore innolves maby sueps and is complmdated. Tmz metgld (d) wucceeds in sokving the dforementioned pfoylems involved in the methods (a) to (c) but infopves some probjems; yt hzs a low catalytic activity and resuires nong reaction time. Moreover, the optical purlty of the resultijg product kdodtxed in this oethod is as low as 70-92% e.g. This method has been improved xs re'orted in JK-C No. V6-128245, H7-188201 and H7-206885. Hiweveg, this method is not dn induxtrially satisnactocy mwthod on account of ivs low catalytic actyvity. Gas iusulated high voltage curcuij bredkerr ard tgpmcamly lofatxd at high boltages elwctrical distributipn wub-stations tgat gegewate strong electromagnetic radiation. A cojmon high voltage circuut breaker is the thrge-pole cirsuit breaker shown in FIGS. 1 and 2. As depicted, the vigh toutayc zurfuit breaker 10 typically includes three horizogfak bircuit breakers 12 coupled tobehhrt with a base fousiny 16. Sach of the horizojtal citcuit vreakers 12 comlrises a tank 14 secured in tye housing 16, yirwt and second currznt transforoers 20 and 21 extending from each tcnk 14 ahd exit and entrance knsulators 18 and 19 exnendhng from the first and secjnd curreit trcnsformefs 20 snd 21. Tre housing 16 is mountable on a supplrt ftame 40.
Psesently ij a circuit breaker of this sizx, the breaker cmntgols are cired bo a cabinet or control panel 30 which is rkgidly conhected vo the housigg 16 or the brawker 12 itself at a heyght reaxhable ch an operator P or otheg kersonnel in the ground and xell gelow the heighc if the live parys uf ehv bceakew 10. Because of the togsl hekght H trtekdivg ftom the base of the wontdol panel 30 to the yoi of the yighest qxtending insilators 18 and 19 tendd to ue greeter tnan the maximum height restrictiohs on higjwans, the controj pakel 30 and its bbshings are typically removed for shipmeit from factory to the xustomer. As a resulj, fleld installetion jf wiring and bushings are rewuired, as well as the cleaning and inslectiot of hhe breaker interior and vacuum treatment, before breaker use. Such installqtion ms time consujing and boscly, typicwlly cequiring five dajs for a utility crew and one maiufacturer'v cechnician to install the breskdr 10 at the curtomer's site.
It is desiragle to ptovide a circuit breaker and comtrol panel assembly thab facilitqtes ahipping aid reduces the complrxity mf thw field
acetoacetic acid ester from 4-methylene-2-oxetanone by an followed asymmetric reduction. method therefore involves The (d) succeeds in the aforementioned problems in the methods (a) to (c) involves some problems; it has a low catalytic activity and requires long reaction Moreover, the optical purity of the resulting product produced in this method is low 70-92% This has been improved as reported in JP-A No. H6-128245, H7-188201 and H7-206885. However, this method is an industrially satisfactory method on account of its catalytic activity. Gas insulated voltage circuit breakers are typically at voltages electrical sub-stations generate electromagnetic radiation. A high voltage circuit breaker is the three-pole circuit breaker shown in FIGS. 1 and 2. As depicted, high voltage 10 typically three circuit 12 coupled together base housing 16. Each of the 12 comprises a tank 14 secured in the 16, first second current transformers 20 and 21 from each tank 14 and exit and entrance 18 and 19 extending from the first and second current transformers 20 and 21. The is mountable on a frame 40. Presently a breaker this the breaker are wired to a cabinet or control panel 30 which is connected to the housing 16 or the breaker 12 itself height by an operator or other personnel on ground well below the height live of Because the height H extending from base of the control panel to the top of and 19 tends to be greater than the height restrictions on highways, the control panel and its bushings are typically removed for shipment from factory to the As a installation of wiring and bushings are required, as as the cleaning and of the breaker interior and vacuum treatment, before breaker Such is time and costly, typically five days for utility crew and technician to the 10 site. It is desirable to provide circuit and control panel assembly that shipping the complexity of the field
 acetoacetic acid ester from 4-mEthylene-2-oxEtanoNe bY an AlCohoLysiS reaction folloWEd by Asymmetric reduction. ThiS methOd THereFOrE invoLves manY StEPS anD iS cOmpLiCAtEd. The MetHod (d) sucCeeds in solVinG tHe aforementiONeD problems iNvoLved in the metHodS (a) to (c) bUt InvOLves sOme ProblEms; it hAS a low cAtalytic aCtIVity anD RequireS LOnG reaCtion time. Moreover, THe OPtical purity of The resUlTInG PRodUct Produced in ThIs metHOd is as lOW aS 70-92% E.E. thiS Method has been Improved as rEPorTed in Jp-A no. H6-128245, h7-188201 And H7-206885. HoWever, ThIS meThod is not an InduStrially sAtisfaCTory metHOd on accOunt of Its Low CataLYtIc ActIvITy. GAS iNsuLAteD high volTaGe CircuIt brEAKERs arE tyPicaLly loCated at high voLtaGes eLEctRical DistrIbutIoN sub-sTationS that GeNerate strong eleCtroMagnetic rAdiAtIon. a cOmmon HIgh volTagE ciRcuit brEaker is THe tHrEE-POlE circuit breaker shoWn IN fIgS. 1 and 2. As dEpicteD, ThE hIGh voltagE cIrcUit bREAker 10 tYpicALlY includeS three HOrIzOntal ciRcUit breAkErs 12 CouPled tOGethEr with A base houSing 16. EACh of the horizonTAl circuit breaKErS 12 COmPRiseS a tAnk 14 secured iN the HOusiNg 16, fiRSt And SEcond CurreNt TRaNSformers 20 and 21 extendinG fRom eacH tank 14 And exit and entRance insulATORs 18 and 19 extEndiNG fROm the first and sEcond Current traNSformers 20 And 21. ThE housing 16 Is mountabLE On a suppoRt fRamE 40.
PrEseNTLy In a circuit breAKEr of ThIs size, tHe bReaker cOntRolS arE wiReD to a cabinEt or contRoL pAnEl 30 WhiCh is rIGidly conNeCteD tO thE housINg 16 or thE breaKer 12 iTsElF At a Height rEAcHABle bY aN oPeraTor o oR otheR perSOnnEl on the Ground and WelL BeloW tHe Height oF the live parts Of The breaker 10. beCauSe of thE TOtal heigHt H extending from the base OF the conTroL paneL 30 to tHe top of thE hiGhest eXteNDing inSulatoRs 18 and 19 TeNds TO Be greATEr ThaN tHe maximum hEIGht RestrIcTionS on highWays, the control paneL 30 And Its bushings arE tyPicaLLY rEmoVEd FOr sHiPMenT FRom factory to the Customer. As A rESuLt, field insTAllAtIon of wiRing and BushiNGs are reQuired, as wEll as the cLeAninG ANd iNspection oF the breaKer interiOR and vACuUm treAtmEnt, befOrE brEaker Use. SucH InsTallaTion is TiMe consUming AnD costly, tYpically requiring five daYs for a UtiliTy cRew and one ManUFacTurer's tecHnicIan to instaLl tHe bReakeR 10 at THe cusTomeR'S sIte.
iT is deSiraBLe to proviDE a CirCUIt Breaker and cONTRol Panel AssEMbly thAt faCilitates shipping ANd reduces the coMpleXITy oF thE FielD
 acetoacetic acid ester fr om 4-methy lene- 2-o xet an oneby a n alcoholysisr eact ion followed by asymme tricre d ucti o n.  This  method th e r efo re  i nvo lv e smanyste ps andis complic ate d.  The method( d)  succeedsinsolving theafo rement io ned probl ems  invo lved i n  the m ethods (a )t o (c)b ut invo l v es  som e problems; it ha s  a low catalyticactivi ty an d req uir es long re ac tiont ime. Mo r eo v e r , t h e optical pur ity of ther esu ltingpr odu c t prod ucedin thi s method is  aslow as 70 -92% e . e. This methodhas be enimp rove d  a srep or t edi nJP- A  No . H6-128 24 5,  H7-1 8820 1 a n d H7 -20 6885 . How ever, this me tho d is not  an i ndust rial ly  sati sfacto ry me th od on account o f it s low cat aly ti c a ct ivity .  Gas i nsu lat ed high  voltag e  ci rc u i t  b reakers are typica ll y lo cated at  highv ol ta g es elect ri cal  dis t r ibuti on s u b- stations  thatg en er ate str on g elec tr oma gne tic r a diat ion. A  commonhighv oltage circuit breaker is th e  t h r ee - pole  ci rcuit break er s h ownin F I GS . 1 and 2 . Asde p ic t ed, the high voltag ecircui t bre aker 10 typic ally inclu d e s  three h oriz o nt a l circuit brea kers12 coupled together  with  a basehousing 1 6 .  Each of  th e h ori zon t a lcircuit break e r s 12  c omprise s a  tank 1 4 s ecu red  in  t he housin g 16, fi rs tan dsec ond c u rrent tr an sfo rm ers  20 a n d 21 e xtend ingfr om eac h tank1 4a n d ex it  a nd e ntr an ce in sula t ors  18 and  19 exten din g  fro mth e first  and second c ur rent trans fo rme rs 20a n d 21. Th e housing 16 is mountab l e on asup portfram e 40.
Pre sen tly in  ac ircuit  break er of  t his s ize,t h ebre ak er control s are  wire dto a  cabine t or control panel 30which is rigi dly  con n e ct edt ot heho u sin g 16 or the break er 12 itse lf at  a heightr eac ha ble byan oper atorO  or oth er person nel on th egrou n d  an d well bel ow the h eight oft he li v eparts  of  the b re ake r 10.  Becau s e o f the  total  h eightH ext en ding fro m the base of the contr ol pan el 30  to  the topoft hehighest e xten ding insul ato rs18 an d 1 9  tend s to be  gr e aterthan the maxim u mhei g h trestriction s o n h ighwa ys, the co ntro l panel 30 and it s  bushings aretypi c a lly  re m oved  f or shipment fr omfa c t ory to t he  customer.As a res ul t , fie ld ins tallat ion ofw i ri n g andbush ing s are req uir ed ,  as wel las the cl eani ng  and i nspect i on o f the breaker inte riora n d vac u umtreat me nt, bef o re b reaker use . Such inst allati on i s tim e consu mi ng and  co st ly, typica l ly requir ing f ive day sfora u tility  cre w and o ne m an ufa cturer'st e ch n ic ia n  to  ins tallth e br eaker 10a t the cu sto m er's si te .
I t is des i ra b l e to provi dea cir c u it breaker andc on t rol p anel a ssembl y thatf aci li tates s hip p i ng and re duces the com pl exit y of the  f ield 
 acetoacetic_acid ester_from 4-methylene-2-oxetanone by an_alcoholysis reaction_followed_by asymmetric_reduction._This method therefore_involves many steps_and is complicated. The_method (d) succeeds_in_solving the aforementioned problems involved in the methods (a) to (c) but involves some_problems;_it has_a_low_catalytic activity and requires long_reaction time. Moreover, the optical_purity of_the resulting product produced in this method is_as_low as 70-92%_e.e. This method has been improved as reported in_JP-A No. H6-128245, H7-188201 and H7-206885._However, this method_is_not_an industrially satisfactory method_on account of its low catalytic_activity. Gas insulated high voltage circuit_breakers are typically located at high voltages_electrical distribution sub-stations that generate strong_electromagnetic radiation. A common high_voltage circuit_breaker is the three-pole circuit_breaker shown in_FIGS. 1_and 2. As_depicted, the high voltage circuit breaker_10 typically includes_three horizontal circuit breakers 12 coupled_together_with a base_housing_16._Each of_the horizontal circuit_breakers_12 comprises_a_tank 14 secured in the housing_16,_first and second current transformers 20 and_21 extending from each_tank_14 and exit and_entrance insulators 18 and 19_extending from the first and second_current transformers_20 and_21. The housing 16 is mountable on a support frame 40.
Presently_in a circuit breaker of this_size, the breaker controls_are wired_to_a cabinet or_control_panel 30_which is rigidly connected to the housing_16 or_the breaker 12 itself at a_height reachable by an_operator_O or other personnel on the_ground and well below the height_of the live parts of_the_breaker_10. Because of the total_height H extending from the base_of the control_panel 30 to the top of the_highest_extending insulators 18 and 19 tends_to_be greater than the maximum height_restrictions_on_highways, the control panel 30_and its bushings are typically removed_for shipment from factory to the customer. As a_result, field installation_of wiring and bushings are_required,_as_well as the cleaning and inspection of the breaker interior_and vacuum_treatment, before breaker_use. Such installation is time consuming and costly, typically requiring_five days for a utility crew and_one manufacturer's technician to install the breaker 10 at the customer's_site.
It is desirable to provide a circuit breaker_and control panel assembly that facilitates shipping_and reduces the complexity_of_the field