1-Methyl-1H-pyrazole-5-boronic acid pinacol ester
- Product Name
- 1-Methyl-1H-pyrazole-5-boronic acid pinacol ester
- CAS No.
- 847818-74-0
- Chemical Name
- 1-Methyl-1H-pyrazole-5-boronic acid pinacol ester
- Synonyms
- 1-Methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole;1-Methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrazole;1-Methyl-5-(tetraMethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole;CBI-BB ZERO/005567;e-5-boronic Acid PinacoL;1-Methyl-1H-pyrazole-5-bo...;Pinacol 1-methyl-1h-pyrazole-5-borate;Pinacol 1-methyl-pyrazol-5-yl-boronate;1-Methyl-1H-pyrazole-5-boronic acid pinacol;1-Methyl-pyrazole-5-boronic acid pinacol ester
- CBNumber
- CB9668122
- Molecular Formula
- C10H17BN2O2
- Formula Weight
- 208.07
- MOL File
- 847818-74-0.mol
1-Methyl-1H-pyrazole-5-boronic acid pinacol ester Property
- Melting point:
- 67-71 °C
- Boiling point:
- 308.3±15.0 °C(Predicted)
- Density
- 1.05±0.1 g/cm3(Predicted)
- storage temp.
- Inert atmosphere,Store in freezer, under -20°C
- pka
- 1.94±0.10(Predicted)
- form
- crystal
- color
- white
- Water Solubility
- Slightly soluble in water.
- InChI
- InChI=1S/C10H17BN2O2/c1-9(2)10(3,4)15-11(14-9)8-6-7-12-13(8)5/h6-7H,1-5H3
- InChIKey
- HLXOVAMYQUFLPE-UHFFFAOYSA-N
- SMILES
- N1(C)C(B2OC(C)(C)C(C)(C)O2)=CC=N1
- CAS DataBase Reference
- 847818-74-0(CAS DataBase Reference)
Safety
- Hazard Codes
- Xn
- Risk Statements
- 22-36/37/38
- Safety Statements
- 26
- WGK Germany
- 3
- TSCA
- No
- HazardClass
- IRRITANT
- HS Code
- 29349990
Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Warning
- Hazard statements
-
H302Harmful if swallowed
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
- Precautionary statements
-
P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P264Wash hands thoroughly after handling.
P264Wash skin thouroughly after handling.
P270Do not eat, drink or smoke when using this product.
P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.
P302+P352IF ON SKIN: wash with plenty of soap and water.
P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
N-Bromosuccinimide Price
- Product number
- 698628
- Product name
- 1-Methyl-1H-pyrazole-5-boronic acid pinacol ester
- Purity
- 97%
- Packaging
- 5g
- Price
- $63.2
- Updated
- 2025/07/31
- Product number
- 698628
- Product name
- 1-Methyl-1H-pyrazole-5-boronic acid pinacol ester
- Purity
- 97%
- Packaging
- 1g
- Price
- $26
- Updated
- 2023/06/20
- Product number
- M2681
- Product name
- 1-Methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrazole
- Purity
- >98.0%(GC)(T)
- Packaging
- 1g
- Price
- $67
- Updated
- 2025/07/31
- Product number
- M2681
- Product name
- 1-Methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrazole
- Purity
- >98.0%(GC)(T)
- Packaging
- 5g
- Price
- $266
- Updated
- 2023/06/20
- Product number
- M330343
- Product name
- 1-Methyl-1H-pyrazole-5-boronic acid pinacol ester
- Packaging
- 10mg
- Price
- $45
- Updated
- 2021/12/16
1-Methyl-1H-pyrazole-5-boronic acid pinacol ester Chemical Properties,Usage,Production
Chemical Properties
White to light brown solid
Uses
1-Methyl-1H-pyrazole-5-boronic acid pinacol ester is used as a pharmaceutical intermediate, agrochemical intermediate.
Synthesis
930-36-9
61676-62-8
847818-74-0
To a solution of 1-methylpyrazole (4.1 g, 50 mmol) in tetrahydrofuran (THF, 100 mL) was slowly added n-butyllithium (n-BuLi, 2.2 M solution in THF, 55 mmol) at 0 °C. The reaction mixture was stirred at room temperature for 1 hour and then cooled to -78 °C. Subsequently, 2-isopropoxy-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (12.3 mL, 60 mmol) was added to the reaction system. The reaction was carried out at -78 °C for 15 min and then gradually warmed up to 0 °C, taking 1 hour. Upon completion of the reaction, the reaction was quenched with saturated ammonium chloride (NH4Cl) solution and extracted with dichloromethane (DCM). The organic phases were combined, washed with distilled water (2 × 100 mL), dried over anhydrous sodium sulfate (Na2SO4), and concentrated under reduced pressure to afford the brown solid product 1-methyl-1H-pyrazole-5-boronic acid pinacol ester (8.0 g, 77% yield), which could be used for the subsequent reaction without further purification. The product was detected by liquid chromatography-mass spectrometry (LCMS, ES), showing m/z 127 (M+H)+ [RB(OH)2]; nuclear magnetic resonance hydrogen spectroscopy (1H NMR, CDCl3, 400 MHz) showed δ 7.57 (s, 1H), 6.75 (s, 1H), 4.16 (s, 3H) and 1.41 (s, 12H).
References
[1] Patent: WO2009/158372, 2009, A1. Location in patent: Page/Page column 30; 31
[2] Patent: WO2009/158374, 2009, A2. Location in patent: Page/Page column 30
[3] Patent: WO2008/98105, 2008, A1. Location in patent: Page/Page column 36
[4] Patent: US2010/216843, 2010, A1. Location in patent: Page/Page column 20-21
[5] Patent: WO2008/121786, 2008, A1. Location in patent: Page/Page column 42-43
1-Methyl-1H-pyrazole-5-boronic acid pinacol ester Preparation Products And Raw materials
Raw materials
Preparation Products
1-Methyl-1H-pyrazole-5-boronic acid pinacol ester Suppliers
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View Lastest Price from 1-Methyl-1H-pyrazole-5-boronic acid pinacol ester manufacturers
- Product
- 1-Methyl-1H-pyrazole-5-boronicacidpinacolester 847818-74-0
- Price
- US $3.00-9.00/KG
- Min. Order
- 0.1KG
- Purity
- 99%
- Supply Ability
- g-kg-tons, free sample is available
- Release date
- 2025-07-05
- Product
- 1-Methyl-1H-pyrazole-5-boronic acid pinacol ester 847818-74-0
- Price
- US $23.00/KG
- Min. Order
- 1KG
- Purity
- 99%
- Supply Ability
- 20mt
- Release date
- 2023-08-17
- Product
- 1-Methyl-1H-pyrazole-5-boronic acid pinacol ester 847818-74-0
- Price
- US $15.00-10.00/KG
- Min. Order
- 1KG
- Purity
- 99%+ HPLC
- Supply Ability
- Monthly supply of 1 ton
- Release date
- 2021-07-10