Shaanxi BLOOM Tech Co., Ltd. yog ib tug ntawm cov uas paub txog manufacturers thiab lwm tus neeg ntawm 2-bromo-3'-chloropropiophenone cas 34911-51-8 nyob rau hauv Suav teb. Txais tos rau cov lag luam wholesale zoo 2-bromo-3'-chloropropiophenone cas 34911-51-8 muag ntawm no los ntawm peb lub hoobkas. Kev pabcuam zoo thiab tus nqi tsim nyog muaj.
2-Bromo-3'-chloropropiophenoneyog ib tug compound nyob rau hauv niaj hnub kev tshawb fawb biochemical thiab tshuaj synthesis. Nws cov qauv molecular tshwj xeeb ua rau nws muaj peev xwm ua tau zoo, ua lub luag haujlwm tseem ceeb hauv thaj chaw xws li kev npaj cov tshuaj intermediates thiab kev txhim kho biochemical reagents. Nyob rau hauv cov txheej txheem ntawm chav tsev kub thiab lub siab, lub cev lub cev ntawm cov khoom no yog ze ze rau nws cov khoom purity thiab cia ib puag ncig. High-cov khoom purity feem ntau muaj xws li cov xim tsis muaj xim lossis daj daj, thaum cov qauv uas muaj qee yam purity gradients tuaj yeem tshwm li daj- kua xim av. Tsis tas li ntawd, cov khoom nws tus kheej yog irritating, yuav tsum tau ceev faj thaum lub sij hawm sim thiab ntau lawm ua hauj lwm.
Lub solubility ntawm cov compound no muab lub hauv paus ruaj khov rau nws cov ntawv thov kev lag luam. Nws dissolves tau zoo nyob rau hauv ntau yam organic solvents xws li ethanol, ether, chloroform, acetonitrile, dichloroethane, thiab ethyl acetate, thaum pom tsuas yog me ntsis solubility hauv dej. Qhov sib txawv solubility no ua rau nws hloov mus rau ntau yam organic synthesis tawm tsam tshuab. Txawm hais tias nyob rau hauv qhov chaw kuaj xyuas zoo- nplai synthesis lossis loj- nplai kev lag luam, nws tuaj yeem ua tiav cov txheej txheem zoo xws li kev tawm tsam, kev rho tawm, thiab kev ua kom huv, yog li nthuav nws daim ntawv thov scenarios loj heev.
Txhawm rau txhawm rau tshawb nrhiav qhov txiaj ntsig ntawm daim ntawv thov ntawm qhov sib xyaw no, kev txhim kho thiab ua kom zoo dua cov txheej txheem synthesis tau tsim. Cov txheej txheem no siv cov kua bromine thiab m-chloropropiophenone ua cov core reactants thiab siv cov hlau halides ua cov catalysts tshwj xeeb, uas ua tau zoo heev catalytic. Thaum lub sij hawm qhov kev tawm tsam tiag tiag, txoj kev sib xyaw no tsis yog tsuas yog nthuav tawm cov kev tawm tsam sai, ua rau lub voj voog tawm tsam luv luv, tab sis kuj qhia tau hais tias muaj zog tawm tsam xaiv, ua rau muaj kev cuam tshuam sab nraud. Cov txiaj ntsig cov khoom lag luam tsis yog tsuas yog ua tiav cov txiaj ntsig zoo xwb tab sis kuj tseem tswj hwm cov purity siab, ua kom tau raws li cov kev cai nruj ntawm cov tshuaj synthesis thiab biochemical tshawb fawb rau siab - zoo thiab ruaj khov raw khoom. Cov txheej txheem synthesis no tau cog lus zoo rau kev lag luam- nplai siv.
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Raws li ib tug kws tshuaj intermediate
Hauv kev lag luam kws tshuaj, cov khoom sib xyaw ua haujlwm ua lub luag haujlwm tseem ceeb hauv kev lag luam nruab nrab, ua si ib qho tseem ceeb hauv cov txheej txheem hluavtaws ntawm ntau cov khoom siv tshuaj. Raws li lub hauv paus txheej txheem rau kev tsim cov tshuaj molecules, nws muaj peev xwm koom nyob rau hauv ntau yam tshuaj hloov pauv mus rau kev koom tes nyob rau hauv lub functional pab pawg neeg thiab structural segments. Cov kev hloov kho ntawm cov qauv tsim no muaj peev xwm ua kom tiav cov tshuaj molecules nrog cov kev ua ub no sib txawv thiab cov tshuaj siv tshuaj.
Raws li ib qho piv txwv zoo, qhov sib xyaw ua ke no yog cov khoom pib tseem ceeb rau kev sib xyaw rimonabant, cov tshuaj kho mob ua haujlwm hauv kev kho mob rog. Tsis tas li ntawd, nws tseem nthuav qhia txog kev loj hlob muaj peev xwm hauv kev npaj ntawm lwm cov tebchaw nrog cov kev cia siab ntawm cov tshuaj, xws li cov tshuaj tiv thaiv kab mob tshiab thiab cov tshuaj tiv thaiv kab mob.
Lub luag haujlwm tseem ceeb hauv cov organic synthesis
Hauv thaj chaw ntawm cov organic hluavtaws chemistry, nws tseem tuav txoj haujlwm tseem ceeb. Vim nws cov qauv molecular tshwj xeeb thiab reactivity, nws tuaj yeem ua qhov chaw pib lossis nruab nrab rau kev sib txuas cov organic molecules. Organic compounds nrog cov qauv tshwj xeeb thiab kev ua haujlwm tuaj yeem npaj los ntawm kev tawm tsam tshuaj xws li hloov pauv, ntxiv, thiab tshem tawm. Cov tebchaw no muaj kev pom dav dav hauv cov haujlwm xws li cov ntaub ntawv tshawb fawb, kev tshawb fawb txog lub neej, thiab tshuaj tua kab. Piv txwv li, lawv tuaj yeem siv los ua monomers rau cov ntaub ntawv polymeric, cov khoom siv hluavtaws rau surfactants, thiab intermediates rau dyes thiab pigments.
Kev tiv thaiv ib puag ncig ntawm cov khoom no feem ntau cuam tshuam txog kev degradation thiab pov tseg ntawm ib puag ncig cov pa phem. Txawm hais tias kev siv ncaj qha ntawm qhov sib xyaw no hauv kev tiv thaiv ib puag ncig tseem tsis tshua muaj, nws muaj peev xwm tsim cov khoom siv tshwj xeeb catalysts thiab cov ntaub ntawv zoo ib puag ncig los ntawm kev siv cov derivatives thiab intermediates tsim thoob plaws hauv nws cov txheej txheem hluavtaws thiab hloov dua siab tshiab.
Kev tiv thaiv teb
Cov no raws li -cov ntaub ntawv npaj thiab cov catalytic agents muaj peev xwm siv tau ntau yam txiaj ntsig thoob plaws ntau yam kev kho ib puag ncig tseem ceeb, xws li kev kho dej khib nyiab, kev lim dej hauv huab cua, thiab kev kho cov av tsis huv.
Cov tshuaj no yog ib qho tseem ceeb ntawm cov organic synthesis intermediate, muaj cov ntawv thov dav dav hauv cov tshuaj, tshuaj tua kab, tshuaj pleev xim, thiab cov ntaub ntawv ua haujlwm. Muaj ntau txoj kev sib xyaw ua ke, tab sis txoj hauv kev raws li Grignard reagent tau txais txiaj ntsig zoo vim nws qhov kev ua haujlwm siab thiab kev xaiv. Kab lus no muab cov lus piav qhia ntxaws ntxaws ntawm cov txheej txheem synthesis tiav ntawm 2-bromo-3 '- chlorophenoacetone npaj siv Grignard reagent thiab ntxiv hloov mus rau 2-bromo-3' - chlorophenoacetone, suav nrog cov khoom siv raw, kev tiv thaiv kev tiv thaiv, kev ua kom huv si, thiab kev soj ntsuam zoo.
1. Kev kho mob ua ntej ntawm magnesium hmoov: Magnesium hmoov yog ib qho tseem ceeb raw cov ntaub ntawv rau kev npaj Grignard reagents, thiab nws nto feem ntau muaj impurities xws li oxides thiab noo noo, uas yuav cuam tshuam rau kev vam meej ntawm kev tawm tsam. Yog li, magnesium hmoov yuav tsum tau kho ua ntej ua ntej siv. Ib txoj hauv kev yog ntxuav nrog dilute hydrochloric acid los yog acetone kom tshem tawm cov impurities saum npoo. Tom qab ntxuav, muab cov hmoov magnesium tso rau hauv lub tshuab ziab khaub ncaws kom qhuav kom huv si thiab muab tso rau tom qab siv.
2. Qhov sib xyaw ntawm bromoethane thiab tetrahydrofuran (THF): Bromoethane, raws li alkylating reagent ntawm Grignard reagent, muaj kev cuam tshuam loj heev rau kev tawm tsam ntawm nws cov purity. Sib tov bromoethane nrog tus nqi tsim nyog ntawm THF kom ntseeg tau zoo solubility ntawm bromoethane hauv THF. THF, raws li cov kuab tshuaj, tsis tsuas yog yaj cov reactants tab sis kuj stabilizes Grignard reagents.
3. Kev npaj ntawm m-chlorobenzonitrile: m-chlorobenzonitrile yog ib qho substrate rau kev tawm tsam tom qab, thiab nws cov purity kuj cuam tshuam rau qhov zoo thiab kev tawm los ntawm cov khoom. Ua ntej siv, nws yuav tsum tau kuaj xyuas cov dej noo lossis lwm yam impurities thiab qhuav raws li xav tau.
1. Reaction Apparatus Setup: Muab cov khoom ua ntej- kho magnesium hmoov thiab qhov tsim nyog ntawm THF rau hauv peb lub khob qhuav-caj dab nruab nrog lub reflux condenser, ib tug xau funnel, thiab tus pas ntsuas kub. Txij li thaum magnesium hmoov reacts vigorously nrog oxygen thiab noo noo nyob rau hauv cov huab cua, tag nrho cov kev khiav hauj lwm yuav tsum tau ua nyob rau hauv lub nitrogen tiv thaiv kom tsis txhob muaj xwm txheej.
2. Ntxiv ntawm Bromoethane: Thaum nplawm, maj mam ntxiv ib qho sib xyaw ntawm bromoethane thiab THF los ntawm qhov xau funnel. Lub droplet acceleration yuav tsum tau tswj nyob rau hauv ib tug tej yam ntau yam kom tsis txhob muaj cov tshuaj tiv thaiv ntau dhau thiab muaj peev xwm txaus ntshai. Nyob rau tib lub sijhawm, kev saib xyuas yuav tsum tau them rau qhov kub thiab txias ntawm cov tshuaj tiv thaiv sib tov. Kho qhov cua sov los yog poob qis kom tswj qhov kub ntawm qhov kev tawm tsam sib xyaw ntawm 50-60 degree.
3. Kev tswj cov txheej txheem tshuaj tiv thaiv: Nrog rau qhov sib ntxiv ntawm bromoethane, nws tuaj yeem pom tias cov tshuaj tiv thaiv kev tawm tsam pib npuas thiab tso cua sov, uas yog lub cim ntawm Grignard reagent tiam. Tom qab qhov sib ntxiv ntawm dropwise tiav, txuas ntxiv cua sov thiab refluxing rau 1.0-1.5 teev kom paub meej cov tshuaj tiv thaiv ntawm magnesium hmoov. Thaum lub sij hawm tus txheej txheem no, qhov kub thiab xim hloov ntawm qhov kev daws teeb meem yuav tsum tsis tu ncua stirred thiab saib xyuas.
4. Kev txiav txim siab ua tiav cov tshuaj tiv thaiv: Thaum cov xim ntawm cov kev daws teeb meem hloov xim av lossis xim dub thiab tsis muaj npuas ntxiv, nws tuaj yeem txiav txim siab tias cov tshuaj tiv thaiv yog ua tiav. Nyob rau lub sijhawm no, cua sov tuaj yeem nres thiab nplawm tuaj yeem txuas ntxiv mus kom txog thaum cov tshuaj tiv thaiv sib tov txias mus rau chav sov.
1. Dropwise ntxiv ntawm m-chlorobenzonitrile: Hloov cov Grignard reagent npaj rau hauv lwm lub raj mis peb lub caj dab qhuav los ntawm lub catheter, thiab nruab ib lub tshuab hluav taws xob, reflux condenser, thiab tus pas ntsuas kub. Tom qab ntawd, maj mam ntxiv m-chlorobenzonitrile dropwise thaum nplawm. Vim yog cov tshuaj tiv thaiv hnyav ntawm m-chlorobenzonitrile thiab Grignard reagent, tus nqi dripping yuav tsum tau qeeb, thiab qhov kub thiab txias ntawm cov tshuaj tiv thaiv yuav tsum tau saib xyuas zoo.
2. Kev ua kom zoo ntawm cov tshuaj tiv thaiv: Txhawm rau kom ua tiav cov txiaj ntsig siab dua thiab purity, nws yog qhov tsim nyog los ua kom zoo dua cov tshuaj tiv thaiv. Piv txwv li, los ntawm kev kho qhov tsis xws li cov tshuaj tiv thaiv kub, nplawm nrawm, thiab lub sij hawm tshuaj tiv thaiv, qhov pom kev ua ke ntawm cov tshuaj tiv thaiv tuaj yeem pom. Tsis tas li ntawd, nws tseem tuaj yeem sim ntxiv qhov tsim nyog ntawm cov catalyst lossis ligand los txhawb kev nce qib ntawm cov tshuaj tiv thaiv.
3. Kev soj ntsuam cov txheej txheem tshuaj tiv thaiv: Thaum lub sij hawm cov txheej txheem tshuaj tiv thaiv, yuav tsum tau coj mus kuaj tsis tu ncua rau TLC (thin txheej chromatography) los yog GC-MS (gas chromatography-mass spectrometry) tsom xam los soj ntsuam cov kev kawm ntawm cov tshuaj tiv thaiv thiab tiam ntawm cov khoom. Los ntawm kev sib piv cov qauv spectra ntawm cov ntsiab lus sib txawv ntawm lub sijhawm, nws tuaj yeem txiav txim siab seb cov tshuaj tiv thaiv puas tiav thiab seb puas tsim nyog cov tshuaj tiv thaiv ntxiv.
1. Generation ntawm hydrolysis intermediates: Tom qab cov tshuaj tiv thaiv tiav, maj mam ntxiv 3mol / L hydrochloric acid tov dropwise rau cov tshuaj tiv thaiv rau hydrolyze Grignard reagent thiab tso cov intermediates. Thaum lub sij hawm tus txheej txheem dropwise ntxiv, yuav tsum tau them nyiaj mloog mus rau kev tswj lub droplet acceleration thiab kub hloov ntawm cov tshuaj tiv thaiv cov tshuaj tiv thaiv kom tsis txhob muaj overheating nyob rau hauv lub zos los yog kev phem tshwm sim uas yuav ua rau cov khoom decomposition los yog deterioration.
2. Kev sib cais thiab kev ua kom huv ntawm cov khoom: Tom qab cov tshuaj tiv thaiv hydrolysis tiav, cov theem inorganic (feem ntau yog magnesium bromide thiab lwm cov ntsev) yog cais los ntawm cov organic theem (muaj cov intermediates) los ntawm ib tug cais funnel. Tom qab ntawd, cov theem ntawm cov organic yog raug rau atmospheric distillation kom tshem tawm cov kuab tshuaj qis qis xws li THF. Tom qab ntawd, lub tshuab nqus tsev distillation yog nqa tawm los sau ib feem ntawm cov khoom lag luam 3-chlorophenylactone. Thaum lub sij hawm distillation txheej txheem, kub thiab siab tej yam kev mob yuav tsum tau nruj me ntsis tswj kom lub purity thiab tawm los ntawm cov khoom.
3. Kev soj ntsuam zoo ntawm cov khoom: Cov khoom purified raug soj ntsuam zoo los ntawm kev txiav txim siab ntawm melting point, infrared spectroscopy, nuclear magnetic resonance hydrogen spectroscopy, thiab lwm yam. Kev txiav txim siab melting point tuaj yeem txiav txim siab qhov purity ntawm cov khoom; Infrared spectroscopy thiab nuclear magnetic resonance hydrogen spectroscopy tuaj yeem paub meej ntxiv seb cov qauv ntawm cov khoom ua tau raws li qhov xav tau.
1. Kev npaj rau cov tshuaj tiv thaiv bromination: Ntxiv ib qho nyiaj ntawm 3-chlorophenylacetone, kua bromine, hnyav, thiab catalyst nyob rau hauv ib ntus rau hauv plaub lub caj dab cov tshuaj tiv thaiv lub khob nruab nrog hluav taws xob stirrer, reflux condenser, thiab tus pas ntsuas kub. Kev xaiv cov kuab tshuaj yuav tsum coj mus rau hauv tus account lawv solubility nyob rau hauv reactants thiab cov khoom, nrog rau kev yooj yim ntawm kev ua tom ntej; Tus nqi ntawm cov catalyst ntxiv yog hloov kho raws li kev sim xav tau los txhim kho cov nyhuv tshuaj tiv thaiv.
2. Kev tswj cov tshuaj tiv thaiv bromination: Pib cua sov cov tshuaj tiv thaiv rau qhov kub thiab txias (xws li 15 degree) thaum nplawm, thiab pib lub sijhawm. Thaum lub sij hawm cov txheej txheem tshuaj tiv thaiv, yuav tsum tau ua tib zoo saib xyuas cov xim hloov thiab nplawm cov tshuaj tiv thaiv kom ntseeg tau tias cov tshuaj tiv thaiv du. Nyob rau tib lub sijhawm, cov qauv yuav tsum tau coj mus kuaj rau TLC lossis GC-MS tsom xam los saib xyuas qhov kev nce qib ntawm cov tshuaj tiv thaiv thiab tsim cov khoom.
3. Kev kho tom qab thiab kev ua kom huv ntawm cov khoom: Tom qab cov tshuaj tiv thaiv tiav, cov kuab tshuaj yog thawj zaug tshem tawm los ntawm distillation kom tau txais cov khoom nyoos; Tom qab ntawd ntxuav cov khoom nyoos nrog dej kom tshem tawm cov seem bromides thiab lwm yam impurities; Tom qab ntawd yaj cov khoom nyoos rau hauv cov kuab tshuaj ua kom zoo (xws li ethanol lossis acetone) thiab ua kev kho recrystallization kom tau txais cov khoom ntshiab; Thaum kawg, refined 2-bromo-3 '- chlorophenoacetone cov khoom tau txais los ntawm kev pom, ziab, thiab lwm yam.
Cov txheej txheem synthesis ntawm nws npaj los ntawm Grignard reagent thiab hloov dua siab tshiab ntxiv muaj qhov zoo ntawm kev ua haujlwm yooj yim, siab yield, thiab zoo purity. Txawm li cas los xij, hauv kev siv tswv yim, tseem yuav tsum tau them nyiaj rau kev tswj hwm purity ntawm raw cov ntaub ntawv, kev ua kom zoo ntawm cov tshuaj tiv thaiv, thiab tom qab- kho cov khoom kom ntseeg tau tias qhov zoo thiab cov txiaj ntsig ntawm cov khoom kawg. Nyob rau hauv lub neej yav tom ntej, lwm txoj kev ua kom zoo ib puag ncig thiab muaj txiaj ntsig zoo tuaj yeem tshawb nrhiav ntxiv kom tau raws li qhov kev thov rau 2-bromo-3 '- chlorophenoacetone hauv ntau qhov chaw. Nrog kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis tsis tu ncua thiab kev paub txog kev tiv thaiv ib puag ncig ntawm tib neeg, nws ntseeg tias ntau txoj kev sib xyaw ntsuab thiab ruaj khov yuav raug tsim thiab siv rau hauv kev tsim khoom.
Cov lus nug nquag
- Qhov txawv ntawm TSH thiab TRH yog dab tsi?
Thyrotropin-Tshuaj Hormone thiab Thyroid-Tshuaj Hormone yog cov tshuaj hormones tseem ceeb hauv lub hlwb-thyroid axis, nrog TRH tso tawm los ntawm hypothalamus los txhawb lub pituitary kom tso TSH, uas tom qab ntawd ua rau cov thyroid caj pas tsim cov thyroid hormones (T3/T4). Qhov sib txawv tseem ceeb yog lawv lub hauv paus chiv keeb thiab lub luag haujlwm hauv cov saw: TRH pib txheej txheem los ntawm hypothalamus, thaum TSH ua tus xa xov los ntawm pituitary mus rau cov thyroid caj pas, tsim kev tswj xyuas lub voj uas T3 / T4 qib tswj TRH thiab TSH tso tawm.
- Dab tsi ua rau kev tso tawm ntawm TRH?
Thyrotropin-Tshuaj Hormone (TRH) tso tawm feem ntau yog txhawb nqa los ntawm cov thyroid hormones qis (T3/T4), ua rau muaj kev tawm tswv yim tsis zoo, tab sis kuj yog los ntawm yam xws li txias, kev ntxhov siab, thiab kev tawm dag zog, thiab ntau yam neurotransmitters (xws li norepinephrine) thiab cov tshuaj hormones (xws li leptin), thaum raug inhibited los ntawm lwm tus (xws li dopamine). Qhov tseem ceeb, thaum lub cev xav tau ntau cov thyroid hormones, hypothalamus tso TRH los pib cov tshuaj tiv thaiv kab mob.
- Cov kev mob tshwm sim ntawm thyrotropin - tso cov tshuaj hormones yog dab tsi?
Koj tuaj yeem ntsib qee qhov kev mob tshwm sim tom qab txhaj tshuaj TRH suav nrog dej ntws, kiv taub hau, xeev siab, nce plawv dhia, saj txawv txawv hauv koj lub qhov ncauj thiab xav tau tso zis. Tsis tshua muaj qee tus neeg muaj mob hawb pob.
Cim npe nrov: 2-Bromo-3'-chloropropiophenone CAS 34911-51-8, lwm tus neeg, manufacturers, hoobkas, lag luam wholesale, yuav, nqe, tej, kev muag khoom