Cov lus qhia
| Zog: | Dawb rau lub teeb daj muaju |
| Assay: | 99.0% min |
| Poob rau ziab: | 0.20% max |
| Residue ntawm ignition: | 0.20% max |
| Cov hlau hnyav: | 0.002% Max |
Cov ntaub ntawv raug
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Chaw ua uas tsis tau haus |
Kev qhia tshwj xeeb |
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Lub peev xwm |
5mt / hli |
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Hov ntau |
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Lub teb chaws tseem ceeb |
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Peev Xwm / Batch |
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Paub lawm |
Ntau lawm txij xyoo 2014 |
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Ntxiv rau |
Cov Ntawv Thov
1.1 Epoxidation reagent (core siv)
Txiav medethylsulfoxonium yog feem ntau siv nyob rau hauv cov ecosic synthesis rau epoxidation ntawm carbonyl tebchaw.
Thaum kho nrog lub zog muaj zog (feem ntau sodium hydride, Nah), nws sau dimethroxosulfonium methylide uas tuaj yeem hloov cov methylene pab pawg rau carbonyl teb.
Qhov kev tshwm sim hauv Epoxides, tshwj xeeb yog los ntawm aldehydes thiab ketones, hauv high loo nrog regioselectivity zoo heev thiab kev ua yeeb yam.
1.2 Ylide Chemistry
Raws li cov leej faj ylfur ylide prefursor, nws yog qhov tseem ceeb hauv cov khoom siv hlau-catalyzed carbene hloov pauv.
Sulfur ylides tsim los ntawm TrimethylsulfSulfoxonium iodide siv hauv:
Cyclopropanation
Epoxidation
Aziridination
Cov kev tawm tsam no yog nrov nyob rau hauv asymmetric synthesis thiab cov kws tshawb fawb kev tshawb fawb.
1.3 Tshuaj thiab cov tshuaj kho yeeb tshuaj zoo nkauj
Ua ntawv thov hauv synthesis ntawm cov tshuaj nruab nrab, tshwj xeeb tshaj yog qhov twg epoxides yog cov txheej txheem tseem ceeb thiab cuam tshuam txog kev cuam tshuam loj.
Ntau dav hauv kev ua tshuaj chemistry ua haujlwm vim nws txoj kev sib xyaw nrog cov pab pawg sib txawv.
1.4 Kev Kawm thiab Kev Tshawb Fawb Kev Lag Luam
Nquag siv nyob rau hauv cov txheej txheem kev txhim kho hluavtaws, cov khoom siv hluavtis, thiab kev hloov kho polymer.
Qhov sib xyaw ua ke yog cov kev nyiam ua haujlwm thiab cov txheej txheem tshuaj lom neeg txhim kho rau nws cov kev ua tau zoo hauv ylide-kho cov kev hloov pauv.
Cov txiaj ntsig
2.1 kev pheej hmoo siab nyob rau hauv cov xwm txheej me
Pab kom cov epoxidation muaj txiaj ntsig ntawm cov huab cua kub tsis muaj kev xav tau cov neeg sawv cev hashidizing.
Kev nyab xeeb dua thiab muaj ntau yam xaiv tshaj cov Epoxidation reagents zoo li peracids.
2.2 Kev Tiv Thaiv Ntxuav Cov Tshuaj Tiv Thaiv
Ua cov neeg tsawg heev los ntawm kev siv tsawg heev, feem ntau tsuas yog dmo thiab iodide ntsev, uas yooj yim tshem tawm.
Ua rau muaj kev kub siab epoxides, uas yog qhov tseem ceeb hauv kev tsim khoom lag luam.
2.3 Tau tshaj ntau haiv neeg substrates
Ua haujlwm zoo nrog ntau yam ntawm aldehydes, ketones, thiab, -Unsaturated carbonyl compounds.
Tolates Ntau cov pab pawg ua haujlwm rhiab (piv txwv li, cov neeg estres, pawg, nitro pawg rau cov nyom molecule synthesis.
2.4 Txhim khu kev qha, lag luam muaj reagent
Ruaj khov nyob rau hauv tus qauv kev cia khoom thiab kev lag luam muaj nyob rau hauv ntau qib kawm.
Yooj yim los tswj nyob rau hauv ob qho txheej txheem ntsuas-teev thiab cov txheej txheem kev lag luam.
Tag
Txiav medethylsulfoxonium (CASIDE (CASE 1774-47) yog qhov tseem ceeb tshaj plaws hauv kev txhim kho cov txiv neej rau kev xaiv epoxidation. Nws cov txheej txheem me me, cov pab pawg ua haujlwm tau zoo, thiab cov khoom seem ntxuav kom huv si ua rau nws xaiv qhov kev tshawb fawb thiab kev lag luam. Raws li cov tswv yim hluavtaws hloov kho tshiab rau greener thiab ntau dua kev xaiv kev hloov pauv, thiab lwm yam kev sib pauv rau epoxides thiab lwm yam muaj nuj nqis me-ntiv nplhaib intermediates.
Cim npe nrov: cheesethylsulfoxonium 丨 CASE 1774-47-6
