CAS: 20780-74-9 7-Bromoindoline-2,3-dione

Cov tshuaj sib xyaw ua ke rau CAS No. 20780-74-9 yog 7-Bromoindoline-2,3-dione, nrog cov mis molecular ntawm C₈H₄BrNO₂ thiab molecular hnyav txog 226.03 g / mol.
7-Bromoindoline-2,3-dione yog daj-liab siv lead ua nrog lub melting point ntawm 200 degree. Nws yog me ntsis soluble hauv dej thiab yooj yim soluble hauv cov kuab tshuaj organic xws li dimethylformamide (DMF).

Kev siv:

7-Bromoindoline-2,3-dione feem ntau yog siv los ua tshuaj nruab nrab rau kev sib txuas ntawm cov tshuaj lossis cov khoom siv organic uas muaj cov qauv indole. Cov bromine atoms thiab ketone pawg hauv nws cov molecules muab cov chaw ua haujlwm rau cov tshuaj tiv thaiv tom ntej, thiab tsim nyog rau kev hloov pauv electrophilic lossis condensation tshua.

Txoj Kev Npaj:
Muaj ntau txoj hauv kev los npaj 7-bromo-2,3-dioxoindoline, hauv qab no yog ib txoj hauv kev siv ntau:
7-Bromoindoline-2,3-dione yog tsim los ntawm cov tshuaj tiv thaiv ntawm 2,3-dioxoindoline thiab bromoacetic acid.

Gnee Chem yog cov chaw tsim khoom thiab cov khoom lag luam R & D rau kev tshawb fawb txog kev lag luam chemistry, biochemistry thiab cov khoom siv science, thiab lwm yam. Peb cov khoom tau siv dav hauv ntau yam kev tshawb fawb hauv kev lag luam.

Tau ntau xyoo, lub tuam txhab yeej ib txwm ua raws li cov hauv paus ntsiab lus ntawm "kev ua tau zoo, kev ncaj ncees, kev pabcuam, kev tsis pub lwm tus paub", thiab tau cog lus los ua thawj tus pabcuam pabcuam rau feem ntau ntawm cov kws tshawb fawb tshuaj thiab tshuaj lom neeg. Nrog tus nqi tsim nyog, lub sijhawm xa khoom sai, kev txhawb nqa dav dav thiab xav txog tom qab- kev muag khoom, lub tuam txhab pab txhawb kev txhim kho zoo ntawm Tuam Tshoj txoj kev tshawb fawb tshuaj.

Yuav ntim li cas?

A: Nws tuaj yeem ua raws li koj xav tau thiab cov duab ntawm koj cov khoom. Feem ntau hais lus, peb tuaj yeem muab cov khoom ntim hlau, cov thawv ntim khoom, ntim lub thawv ntoo thiab lub hnab ntim khoom.

Hom kev them nyiaj twg koj txais?

A: Rau kev txiav txim me me, koj tuaj yeem them los ntawm xaim xaim, Western Union lossis Paypal, thiab rau kev txiav txim ib txwm, koj tuaj yeem them los ntawm xaim xaim lossis tsab ntawv credit rau peb lub tuam txhab tus account.

Koj puas yog tuam txhab lag luam lossis chaw tsim khoom?

A: Peb yog cov chaw tsim khoom.

Koj lub sijhawm xa khoom ntev npaum li cas?

A: Feem ntau nws yog 1-5 hnub yog tias cov khoom muaj nyob hauv Tshuag. lossis yog tias cov khoom tsis nyob hauv Tshuag, nws yog raws li qhov ntau.

Koj puas muab cov qauv? puas yog dawb los yog ntxiv?

A: Yog, peb tuaj yeem muab cov qauv dawb tab sis tsis them tus nqi thauj khoom.

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