6-BroMopyrazolo[1,5-a]pyridine
- Product Name
- 6-BroMopyrazolo[1,5-a]pyridine
- CAS No.
- 1264193-11-4
- Chemical Name
- 6-BroMopyrazolo[1,5-a]pyridine
- Synonyms
- 6-BroMopyrazolo[1,5-a]pyridine;Pyrazolo[1,5-a]pyridine,6-bromo-;6-broMoH-pyrazolo[1,5-a]pyridine
- CBNumber
- CB02602376
- Molecular Formula
- C7H5BrN2
- Formula Weight
- 197.03
- MOL File
- 1264193-11-4.mol
6-BroMopyrazolo[1,5-a]pyridine Property
- Density
- 1.69±0.1 g/cm3(Predicted)
- storage temp.
- Sealed in dry,Room Temperature
- pka
- 1.69±0.30(Predicted)
- Appearance
- Light yellow to brown Solid-Liquid Mixture
- InChI
- InChI=1S/C7H5BrN2/c8-6-1-2-7-3-4-9-10(7)5-6/h1-5H
- InChIKey
- MJGAKVFFADUFMG-UHFFFAOYSA-N
- SMILES
- C12=CC=NN1C=C(Br)C=C2
Safety
- HS Code
- 2933998090
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
-
P280Wear protective gloves/protective clothing/eye protection/face protection.
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
- B699485
- Product name
- 6-Bromopyrazolo[1,5-a]pyridine
- Packaging
- 0.5g
- Price
- $360
- Updated
- 2021/12/16
- Product number
- 3H32-9-84
- Product name
- 6-Bromopyrazolo[1,5-a]pyridine
- Purity
- 97%
- Packaging
- 1g
- Price
- $95
- Updated
- 2021/12/16
- Product number
- OR910028
- Product name
- 6-Bromopyrazolo[1,5-a]pyridine
- Purity
- 98%
- Packaging
- 250mg
- Price
- $130
- Updated
- 2021/12/16
- Product number
- 5230AA
- Product name
- 6-Bromopyrazolo[1,5-a]pyridine
- Packaging
- 250mg
- Price
- $144
- Updated
- 2021/12/16
- Product number
- 5230AA
- Product name
- 6-Bromopyrazolo[1,5-a]pyridine
- Packaging
- 1g
- Price
- $284
- Updated
- 2021/12/16
6-BroMopyrazolo[1,5-a]pyridine Chemical Properties,Usage,Production
Uses
6-Bromopyrazolo[1,5-a]pyridine was a useful reagent in discovery of p110a-selective PI3 kinase inhibitors.
Synthesis
55899-30-4
1264193-11-4
The general procedure for the synthesis of 6-bromopyrazolo[1,5-a]pyridine-3-carboxylic acid from ethyl 6-bromopyrazolo[1,5-a]pyridine is as follows: all reactions were carried out under decarboxylation/Vilsmeier conditions or hydrolysis/reduction/re-oxidation unless otherwise indicated. 1. Decarboxylation: Ethyl 6-bromopyrazolo[1,5-a]pyridine-3-carboxylate (1 equiv.) was dissolved in 40% aqueous H2SO4 (3 mL) and refluxed for 18 hours. Upon completion of the reaction, the solution was cooled in an ice bath, neutralized to pH 7 with 6 M NaOH, and then extracted twice with CH2Cl2. The organic phases were combined, dried with anhydrous Na2SO4 and concentrated under reduced pressure to give the decarboxylated product. 2. Vilsmeier reaction: Under the protection of nitrogen, the above decarboxylation product was dissolved in anhydrous DMF (2 mL), cooled to 0 °C, and POCl3 (3 equiv.) was added slowly. The reaction mixture was gradually warmed to room temperature and stirred for 2 hours. The reaction solution was poured into ice water, the pH was adjusted to 10 with 1 M NaOH and stirred for 1 h. The reaction solution was extracted twice with CH2Cl2. The organic phases were combined, washed twice with water, dried over anhydrous Na2SO4 and concentrated under reduced pressure to give the aldehyde product. Alternative route: 1. Hydrolysis of the ester: Ethyl 6-bromopyrazolo[1,5-a]pyridine-3-carboxylate (1 eq.) was dissolved in a mixture of 1 M NaOH (3 eq.) and EtOH (5 mL) and refluxed for 6 hours. EtOH was removed under reduced pressure and the residual aqueous phase was acidified to pH 1 with 1 M HCl, the precipitated carboxylic acid was collected by filtration, washed with water and dried. 2. Reduction of carboxylic acid: The above carboxylic acid (1 eq.) was suspended in anhydrous THF (10 mL) under nitrogen protection, CDI (1.5 eq.) was added, and stirred for 18 hours. The resulting solution was added dropwise to a solution of NaBH4 (5 eq.) in water (10 mL) and stirred for 30 min. The reaction solution was quenched with 1 M HCl and stirring was continued for 30 min. The solution was neutralized with saturated aqueous NaHCO3 and extracted twice with CH2Cl2. The organic phases were combined, dried over anhydrous Na2SO4, concentrated under reduced pressure, and purified by column chromatography (hexane:EtOAc gradient elution) to give the alcohol product. 3. Reoxidation of alcohols: A suspension of pyrazolo[1,5-a]pyridine-3-methanol (1 eq.) with MnO2 (10 eq.) in CH2Cl2 (2 mL) was stirred at room temperature for 4 days. The reaction mixture was filtered through diatomaceous earth, washed with CH2Cl2 and the filtrate was concentrated under reduced pressure to give the aldehyde product.
References
[1] Bioorganic and Medicinal Chemistry, 2012, vol. 20, # 1, p. 69 - 85
6-BroMopyrazolo[1,5-a]pyridine Preparation Products And Raw materials
Raw materials
Preparation Products
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View Lastest Price from 6-BroMopyrazolo[1,5-a]pyridine manufacturers
- Product
- 6-BroMopyrazolo[1,5-a]pyridine 1264193-11-4
- Price
- US $0.00-0.00/KG
- Min. Order
- 1KG
- Purity
- 98.0%
- Supply Ability
- 10000KGS
- Release date
- 2025-06-03
- Product
- 6-BroMopyrazolo[1,5-a]pyridine 1264193-11-4
- Price
- US $1.00/g
- Min. Order
- 1g
- Purity
- 99%
- Supply Ability
- 10000KGS
- Release date
- 2020-01-10