Dimethyl Sulfoxide → 2,3,4,5,6,7-Hexahydro-1-(3-formyl-2-phenylpropanoyl)-1H-azepine

Dimethylsulphoxide (3.97 g, 50.9 mmol) in dichloromethane (25 ml) was added to a solution of oxalyl chloride (3.09 g, 24.4 mmol) at -50° C. in dichloromethane (25 ml). The reaction mixture was kept at this temperature for 5 min, treated with a solution of the product of step (a) (5.54 g, 21.2 mmol) in dichloromethane (30 ml), and, after 1 h, treated with triethylamine (10.72 g, 0.106 mol). The cooling bath was removed and the reaction mixture allowed to warm to room temperature. Water (100 ml) was added and the separated aqueous phase washed with dichloromethane (50 ml). The combined organic phases were washed with brine (50 ml), water (50 ml), dried (Na2SO4) and concentrated in vacuo to afford the title compound as an oil (5.30 g, 96.4%).

1. waitafter 1 h
2. customThe cooling bath was removed
3. additionWater (100 ml) was added
4. washthe separated aqueous phase washed with dichloromethane (50 ml)
5. washThe combined organic phases were washed with brine (50 ml), water (50 ml)
6. dry with materialdried (Na2SO4)
7. concentrationconcentrated in vacuo

ORD-Eintrag

ord-d8f27a525cbf468d994e7500d120b7e4

Quelldatensatz

uspto-grants-1997_03

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US05610295