Electric Literature of 128071-77-2, 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. 128071-77-2, name is 4-Bromo-2-fluoronicotinaldehyde. A new synthetic method of this compound is introduced below.
A mixture of 4-bromo-2-fluoropyridine-3-carbaldehyde (101 mg, 0.5 mmol), 4-(tributylstannyl)-1-(triphenylmethyl)-1H-imidazole (Intermediate A, 450 mg, 0.75 mmol) and PdAMPHOS (35 mg, 0.05 mmol) in acetonitrile (3 mL) was stirred at 100 C. for 5 h under N2 atmosphere. Then the reaction mixture was diluted with water (30 mL) and extracted with ethyl acetate (50 mL*2). The organic phases were combined, washed with brine, and dried over Na2SO4. The solvent was removed under reduced pressure and the residue was purified by flash chromatography eluting with ethyl acetate in hexane (10% to 30% gradient) to yield 2-fluoro-4-[1-(triphenylmethyl)-1H-imidazol-4-yl]pyridine-3-carbaldehyde (70 mg, 33%) as light yellow oil.
At the same time, in my other blogs, there are other synthetic methods of this type of compound,128071-77-2, 4-Bromo-2-fluoronicotinaldehyde, and friends who are interested can also refer to it.
Reference:
Patent; Merck Patent GmbH; SHERER, Brian A.; (167 pag.)US2016/75711; (2016); A1;,
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