Dimethylformamide → HCID 43141315, compound

Temperature

50 °C

A 100 mL round-bottom flask was purged and maintained with an inert atmosphere of nitrogen and charged with (Z)-1-[1-(2-chlorophenyl)ethylidene]-2-methylhydrazine (2.00 g, 10.9 mmol, 1.00 equiv), (chloromethylidene)dimethylazanium chloride (12.7 g, 99.2 mmol, 9.06 equiv) and N,N-dimethylformamide (40 mL). The resulting solution was stirred overnight at 50° C. The reaction progress was monitored by LCMS. The reaction was then quenched by the addition of saturated sodium carbonate solution (100 mL). The resulting solution was extracted with ethyl acetate (3×100 mL) and the organic layers were combined, washed with brine (2×100 mL), dried over sodium sulfate and concentrated under reduced pressure. The residue was chromatographed on a silica gel column with ethyl acetate/petroleum ether (1/1) to yield 1.00 g (41% yield) of 3-(2-chlorophenyl)-1-methyl-1H-pyrazole-4-carbaldehyde as a yellow solid. LCMS (ESI, m/z): 221 [M+H]+.

1. customA 100 mL round-bottom flask was purged
2. temperaturemaintained with an inert atmosphere of nitrogen
3. customThe reaction was then quenched by the addition of saturated sodium carbonate solution (100 mL)
4. extractionThe resulting solution was extracted with ethyl acetate (3×100 mL)
5. washwashed with brine (2×100 mL)
6. dry with materialdried over sodium sulfate
7. concentrationconcentrated under reduced pressure
8. customThe residue was chromatographed on a silica gel column with ethyl acetate/petroleum ether (1/1)

ORD record

ord-e0aea5dd33df44ed81d3e4a3b9782747

Source dataset

uspto-grants-2015_09

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09133148B2