Cesium carbonate → HCID 69146057, compound

Temperature

120 °C

315 mg (2.5 mmol) of N-allylpiperazine were dissolved in 5 ml of toluene under an argon atmosphere. 93 mg (0.1 mmol) of tris-(dibenzylideneacetone)-dipalladium(0) (Pd2dba3), 126 mg (0.2 mmol) of 2,2′-bis-(diphenylphosphino)-1,1′-binaphthy I (BINAP), 1.14 g (3.5 mmol) of cesium carbonate and 515 mg (2.54 mmol) of 5-bromo-2-nitropyridine were then added and the mixture was stirred at 120° C., in a microwave oven, for 4 hours. After the reaction mixture had cooled down to room temperature, a saturated aqueous solution of ammonium chloride was added. After that, the aqueous reaction mixture was extracted three times with in each case 50 ml of ethyl acetate. After the organic phase had been dried over sodium sulfate, the drying agent had been filtered off and the solvent had been evaporated down to dryness, the residue was chromatographed through silica gel using ethyl acetate/methanol (4:1), with 304 mg (46% of theory) of the title compound being obtained.

1. temperatureAfter the reaction mixture had cooled down to room temperature
2. extractionAfter that, the aqueous reaction mixture was extracted three times with in each case 50 ml of ethyl acetate
3. dry with materialAfter the organic phase had been dried over sodium sulfate
4. filtrationthe drying agent had been filtered off
5. customthe solvent had been evaporated down to dryness
6. customthe residue was chromatographed through silica gel

ORD record

ord-9201e837c5034f02b139bcb3137a00a3

Source dataset

uspto-grants-2008_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07320979B2