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. 3994-50-1, name is 1-Methyl-4-nitro-1H-pyrazole, This compound has unique chemical properties. The synthetic route is as follows., SDS of cas: 3994-50-1
To tert-butyl N-[( iS)- 1 -(3 -bromo-5 -fluorophenyl)but-3 -en-i -yl] carbamate (0.19 g, 0.552 mmol), i-methyl-4-nitro-iH-pyrazole (0.070 g, 0.552 mmol), di(adamantan-i20 yl)(butyl)phosphine (0.059 g, 0.166 mmol), pivalic acid (0.019 ml, 0.166 mmol), K2C03(0.229 g, 1.656 mmol) was added DMF (1.1 ml), and the mixture was purged with Ar. Pd(OAc)2 (0.025 g, 0.110 mmol) was added and the reaction was heated at 120 C for 18 h. The reaction was partitioned between water (15 ml) and EtOAc (30 ml). The aqueous layer was extracted with EtOAc (2 x 20 ml). The combined organic layers was washedwith brine (15 ml), dried over MgSO4, filtered and concentrated. The residue was purified by normal phase chromatography using hexanes and EtOAc as eluents to give tert-butyl N- [(15)-i -[3 -fluoro-5 -(1 -methyl-4-nitro- iH-pyrazol-5 -yl)phenyl]but-3 -en-i -yl]carbamate (0.123 g, 57%) as a yellow oil. ?HNMR(400MHz, CDC13)oe 8.23- 8.i7(m, iH), 7.22-7.16 (m, 1H), 7.10 (s, 1H), 7.01 (dt,J=8.5, 1.9 Hz, 1H), 5.76-5.60 (m, 1H), 5.22-5.11(m, 2H), 4.90 (br. s., 1H), 4.78 (br. s., 1H), 3.78 – 3.69 (m, 3H), 2.60 – 2.48 (m, 2H), 1.41(br. s., 9H).
According to the analysis of related databases, 3994-50-1, the application of this compound in the production field has become more and more popular.
Reference:
Patent; BRISTOL-MYERS SQUIBB COMPANY; CORTE, James R.; DE LUCCA, Indawati; FANG, Tianan; YANG, Wu; WANG, Yufeng; DILGER, Andrew K.; PABBISETTY, Kumar Balashanmuga; EWING, William R.; ZHU, Yeheng; WEXLER, Ruth R.; PINTO, Donald J. P.; ORWAT, Michael J.; SMITH, Leon M. II; WO2015/116886; (2015); A1;,
Pyrazole – Wikipedia,
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