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. 1191616-45-1, name is 4-(4-Bromophenyl)-1-methyl-1H-pyrazole, A new synthetic method of this compound is introduced below., COA of Formula: C10H9BrN2
Into a 500-mL 3-necked round-bottom flask, were placed 4-(4-bromophenyl)- 1-methyl-1H-pyrazole (3.80 g, 16.0 mmol) and tetrahydrofuran (50 mL). This was followed by the addition of n-BuLi (7.00 mL, 74.3 mmol) dropwise with stirring at -80 C within 5 min. To this was added 1-benzyl-5-bromo-N- methoxy-N-methyl-1 H-indazole-3-carboxamide (2.00 g, 5.34 mmol, synthesis see below). The resulting solution was stirred for 150 min at -80 C. The reaction was then quenched by the addition of 50 mL of ice water. The resulting solution was extracted twice with 50 mL of ethyl acetate and the organic layers combined and dried over anhydrous sodium sulfate and concentrated under vacuo. The residue was applied onto a silica gel column with dichloromethane/methanol (100/1). This resulted in 1.70 g (60%) of 5- bromo-3-[[4-(1-methyl-1 H-pyrazol-4-yl)phenyl]carbonyl]-1-(1-phenylpentyl)- 1 H-indazole as a yellow solid.
The synthetic route of 1191616-45-1 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; MERCK PATENT GMBH; CANCER RESEARCH TECHNOLOGY LTD.; SCHIEMANN, Kai; (173 pag.)WO2016/41618; (2016); A1;,
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics