Category: 934758-92-6

In the chemical reaction process, reaction time, type of solvent, can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product. An updated downstream synthesis route of 934758-92-6 as follows. Product Details of 934758-92-6

Fuming nitric acid (14.00 ml, 329 mmol) was added at 0 ‘C over a period of 10 min to a solution of 5-chloro-1 H-pyrazole (10.0 g, 97.5 mmol) in acetic acid (14.0 ml, 245 mmol). The resulting mixture was stirred at 0 ‘C for 2 h, then acetic anhydride (33.0 ml, 349 mmol) was added and the reaction mixture was stirred at rt. Progress of the reaction was monitored by TLC and LCMS and when starting material was deemed completely consumed (after 4h), the reaction mixture was poured into ice-water (70 mL) and basified with Na2C03 (60 g) and extracted with EtOAc (3 x 100 mL). The combined organic layers were washed with aqueous saturated sodium bicarbonate (100 mL) and brine (50 mL), dried over Na2S04 and concentrated. The afforded solid was washed with n-pentane which gave the title compound (7.0 g, 6.2%) as a solid. MS (ES+) 147.93 [M+H]+.

According to the analysis of related databases, 934758-92-6, the application of this compound in the production field has become more and more popular.

Reference:
Patent; MEDIVIR AB; ALBERTELLA, Mark; OeBERG, Fredrik; (96 pag.)WO2018/141749; (2018); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps, and cheap raw materials. 934758-92-6, name is 5-Chloro-1H-pyrazole, A new synthetic method of this compound is introduced below., HPLC of Formula: C3H3ClN2

To a soution of 5-choro-1H-pyrazoe (3.88 g, 35.2 mmoD in AcOH (5.10 m, 89 mmoD was added at 0C dropwise 90% aqueous HNO3 (5.10 m, 35.2 mmo) and the reaction mixture was stirred at 0C for 2h. Ac20 (12.92 mL 137 mmo) was then added dropwise. The mixture was stirred at RT for 4h, The mixture was poured nto ce-water and AcOEt and Na2003 (33.6 g, 317 mmo) were added. The organic phase was separated and the aqueous phase was extracted with AcOEt, The combined organic ayers were washed with aqueous saturated NaHCO3 and brine, dried over Na2SO4 and concentrated to afford 5-choro-1-nitro-1H-pyrazoe. M/z = 146/148 [M-Hj-. Rt = 0.71 mm (UPLC Method E32), 1H NMR (400 MHz, DMSO-d6): 6 ppm: 8.91 (d, IH), 6.90 (d, IH).

The synthetic route of 934758-92-6 has been constantly updated, and we look forward to future research findings.