Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 930-36-9, name is 1-Methylpyrazole, This compound has unique chemical properties. The synthetic route is as follows., Computed Properties of C4H6N2
A solution of N-methylpyrazole (5.12 g, 62.4 mmol) in THF (100 mL) was cooled to -78 C. and 2.5 M n-butyllithium in hexane (27.5 mL, 68.8 mmol) was added. After stirring for 30 minutes at the same temperature, 0.5 M zinc chloride in THF (107 mL, 53.5 mmol) and 1 M zinc chloride in diethyl ether (15.3 mL, 15.2 mmol) were added. The mixture was allowed to warm to room temperature and 2-iodo-4-nitroanisole (17.4 g, 62.4 mmol) followed by tetrakis(triphenylphosphine)palladium (3.6 g, 3.1 mmol) were added. After stirring at 60 C. for 20 hours, the black solution was concentrated on a rotary evaporator, and extracted with ethyl acetate and brine. Combined organic layers were dried over magnesium sulfate, filtered, and partly concentrated until a solid started to precipitate. Hexane was added, precipitate was filtered off, and washed with a cold 3:1 mixture of hexane/ethyl acetate to give 5-(2-methoxy-5-nitro-phenyl)-1-methyl-1H-pyrazole (8.6 g, 36.9 mmol, 59%) as a tan solid. LCMS m/z (%/o)=234 (M+H, 100). 1H NMR (400 MHz, CDCl3) delta: 8.34 (dd, J=2.8, 9.2 Hz, 1H), 8.19 (d, J=2.8 Hz, 1H), 7.56 ( d, J=2.0 Hz, 1H), 7.08 (d, J=9.2 Hz, 1H), 6.31 (d, J=1.6 Hz, 1H), 3.96 (s, 3H), 3.74 (s, 3H).
According to the analysis of related databases, 930-36-9, the application of this compound in the production field has become more and more popular.
Reference:
Patent; Teegarden, Bradley; Xiong, Yifeng; Strah-Pleynet, Sonja; Jayakumar, Honnappa; Dosa, Peter I.; Feichtinger, Konrad; Casper, Martin; Lehmann, Juerg; Jones, Robert M.; Unett, David J.; Karoline Choi, Jin Sun; US2007/207994; (2007); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics