Application of 15754-60-6,Some common heterocyclic compound, 15754-60-6, name is 1-(tert-Butyl)-1H-pyrazole, molecular formula is C7H12N2, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.
To a suspension of Na2CO3 (3.6 g, 33.9 mmol) in CH2Cl2 (30 mL) was added 1-tert-butyl-1H-pyrazole (2.1 g, 17 mmol) and Br2 (0.9 mL). The mixture was stirred at roomtemperature overnight. The formed solid was removed by filtration and the filter cake waswashed with CH2Cl2 (30 mL). The filtrates were washed with water (20 mL) and brine (20 mL), dried (MgSO4), and concentrated under reduced pressure to afford crude 4-bromo-1-tert-butyl-1H-pyrazole (2.9 g, 85%), which was used in next step without further purification. MS (ESI)m/z: 203 [M+H]+.
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 1-(tert-Butyl)-1H-pyrazole, its application will become more common.
Reference:
Patent; F. HOFFMANN-LA ROCHE AG; GENENTECH, INC.; DO, Steven; HU, Huiyong; KOLESNIKOV, Aleksandr; TSUI, Vickie, H.; WANG, Xiaojing; WO2014/1377; (2014); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics