3 6-Dihydro-2H-pyran-4-boronic acid pinacol ester (CAS # 287944-16-5)
| Hazard Cov Cim | Xn – Ua phem |
| Risk Codes | 22 – Ua phem yog nqos |
| Kev nyab xeeb piav qhia | S20 - Thaum siv, tsis txhob noj lossis haus. S35 - Cov khoom no thiab nws lub thawv yuav tsum muab pov tseg rau hauv txoj kev nyab xeeb. |
| WGK Germany | 3 |
| HS Code | 293499 0 |
Taw qhia
3. acid pinacol ester yog cov organic compound nrog cov tshuaj formula C12H19BO3 thiab molecular hnyav ntawm 214.09g/mol.
Xwm:
-Cov tsos mob: tsis muaj xim tsis muaj kua lossis khoom
- Melting Point: -43 ~ -41 ℃
- Boiling point: 135-137 ℃
Qhov ceev: 1.05 g / mL
-Solubility: Soluble nyob rau hauv cov organic solvents xws li dimethylformamide, dichloromethane, methanol thiab ethanol.
Siv:
- 3, acid pinacol ester yog ib qho tseem ceeb ntawm intermediates hauv organic synthesis. Nws tuaj yeem siv los ua cov tshuaj reagent rau kev tsim kho ntawm C-O thiab C-C daim ntawv cog lus, thiab feem ntau yog siv los ua lub zog rau C-C coupling cov tshuaj tiv thaiv xws li Suzuki cov tshuaj tiv thaiv thiab Stille cov tshuaj tiv thaiv.
-Cov tshuaj kuj tseem siv tau los npaj lwm pab pawg ua haujlwm lossis cov tebchaw, xws li aldehydes, ketones thiab acids.
Txoj kev:
- 3, acid pinacol ester feem ntau yog npaj los ntawm reacting Pyran nrog boronic acid pinacol nyob rau hauv alkali catalysis. Txoj kev npaj tshwj xeeb tuaj yeem xaiv tau raws li qhov xav tau tiag tiag, thiab ib qho kev npaj muaj xws li siv sodium borate thiab pinacol los ua raws li cov xwm txheej alkaline.
Cov ntaub ntawv kev nyab xeeb:
3, acid pinacol ester tej zaum yuav muaj teeb meem rau kev noj qab haus huv thiab ib puag ncig. Kev siv yuav tsum ua raws li cov txheej txheem kuaj kom raug thiab yuav tsum tau nruab nrog cov cuab yeej tiv thaiv tus kheej tsim nyog, xws li cov hnab looj tes hauv chav kuaj thiab tiv thaiv qhov muag.
Tsis tas li ntawd, cov ntaub ntawv kev nyab xeeb tshwj xeeb thiab cov lus qhia ua haujlwm yuav tsum xa mus rau cov ntaub ntawv kev nyab xeeb (SDS) lossis lwm yam kev siv tshuaj lom neeg.
