4-Fluoro-1H-pyrazole

Base Information

• Chemical Name: 4-Fluoro-1H-pyrazole
• CAS No.: 35277-02-2
• Molecular Formula: C3H3FN2
• Molecular Weight: 86.0686
• Hs Code.: 2933199090
• Mol file: 35277-02-2.mol

Synonyms:4-Fluoro-1H-pyrazole;1H-pyrazole, 4-fluoro-;

Chemical Property of 4-Fluoro-1H-pyrazole

Chemical Property:

• Vapor Pressure: 0.673mmHg at 25°C
• Refractive Index: 1.487
• Boiling Point: 192.7 °C at 760 mmHg
• PKA: 13.66±0.50(Predicted)
• Flash Point: 70.3 °C
• PSA: 28.68000
• Density: 1.32 g/cm³
• LogP: 0.54880
• Storage Temp.: Keep in dark place,Sealed in dry,Room Temperature

Purity/Quality:

98%,99%, ^*data from raw suppliers

4-Fluoropyrazole ^*data from reagent suppliers

Safty Information:

• Pictogram(s):  
• Hazard Codes: 

MSDS Files:

Useful:

• Uses: 4-Fluoropyrazole is used in preparation and palladium catalyzed cross-coupling reactions of tributylstannyl fluoropyrazole.

Technology Process of 4-Fluoro-1H-pyrazole

There total 11 articles about 4-Fluoro-1H-pyrazole which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 84.0%

fluoro(trimethylsilyl)acetylene (38346-22-4) → 4-fluoro-1H-pyrazole (35277-02-2)

Guidance literature:

With tetrabutyl ammonium fluoride; acetic acid; In tetrahydrofuran; at 50 ℃;

DOI:10.1016/j.jfluchem.2007.04.019

Reference yield: 77.0%

(Z)-3-(dimethylamino)-2-fluoroacrylaldehyde (761-88-6,152873-63-7) → 4-fluoro-1H-pyrazole (35277-02-2)

Guidance literature:

With hydrazine dihydrochloride; In ethanol; water; at 55 ℃; for 0.5h;

Reference yield: 68.0%

4-fluoro-5-(tributylstannyl)-1H-pyrazole (853180-40-2) → 4-fluoro-1H-pyrazole (35277-02-2)

Guidance literature:

4-fluoro-5-(tributylstannyl)-1H-pyrazole; With n-butyllithium; In tetrahydrofuran; at -78 ℃;

With oxonium; In tetrahydrofuran; Further stages.;

DOI:10.1016/j.tet.2007.03.117

upstream raw materials:

ethanol

7-chloro-7-fluoro-2,5-dioxabicyclo<4.1.0>heptane

(Z)-(2,3,3-trifluoro-l-propenyl)trimethylammonium iodide

diethylamine

Downstream raw materials:

2-(4-fluoropyrazol-1-yl)ethanol

C₁₀H₇F₂IN₂

Refernces

• 1、 -. "Preparation method of 4-fluoro-1H-pyrazole". Paragraph 0036-0045. . Retrieved 2021/10/02.
• 2、 -. "SUBSTITUTED PYRIMIDINES". Page/Page column 87; 88. . Retrieved 2013/04/10.