3-Bromofuran → HCID 19047515, compound

To a solution of n-butyllithium (2.5M, 28 ml, 0.07 mol) in 150 ml of ether at -78° C. was added a solution of 3-bromofuran (10 g, 0.0628 mol) in 30 ml of ether over a 20 min period and the mixture was stirred at -78° C. for 20 min. To the above mixture was added 3-(N-methyl-N-methoxycarbamoyl)furan (9.16 g, 0.059 mol) in 30 ml of ether over a 15 min period and the mixture was stirred at room temperature for 1/2 h. The reaction mixture was quenched with 200 ml of ammonium chloride solution, 500 ml of methylene chloride was added and the mixture was stirred. The organic layer was dried over sodium sulfate, concentrated in vacuo, and the residue was triturated in 100 ml of hexane/t-butylmethylether (9:1). The solid product was filtered and washed with t-butylmethylether to afford 7.5 g (78.3%) of di-(3-furyl)ketone.

1. stirringthe mixture was stirred at room temperature for 1/2 h
2. customThe reaction mixture was quenched with 200 ml of ammonium chloride solution, 500 ml of methylene chloride
3. additionwas added
4. stirringthe mixture was stirred
5. dry with materialThe organic layer was dried over sodium sulfate
6. concentrationconcentrated in vacuo
7. customthe residue was triturated in 100 ml of hexane/t-butylmethylether (9:1)
8. filtrationThe solid product was filtered
9. washwashed with t-butylmethylether

ORD record

ord-97d85dccf2e34f988de982dddefaec95

Source dataset

uspto-grants-1997_02

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05604224