Triphenylphosphine Oxide → HCID 57476116, compound

Temperature

0 °C

To a solution of triphenylphosphine oxide (3.09 g) in acetonitrile (20 ml) was slowly added trifluoromethanesulfonic anhydride (0.93 ml) at 0° C., and the mixture was stirred for 10 min. tert-Butyl 4-{2-(benzylthio)-2-methyl-3-[({7-[methyl(2-thienylsulfonyl)amino]-1H-indol-2-yl}carbonyl)amino]propyl}piperazine-1-carboxylate (1.55 g) was added, and the reaction mixture was stirred at 0° C. for 30 min. Saturated aqueous sodium hydrogencarbonate was added, and the mixture was extracted with ethyl acetate. The ethyl acetate layer was washed with saturated brine, and dried (MgSO4). 4N Hydrogen chloride-ethyl acetate solution was added to the ethyl acetate layer, and the precipitated solid was collected by filtration, and washed with ethyl acetate. The obtained solid was suspended in saturated aqueous sodium hydrogencarbonate, and the mixture was stirred for 30 min. The solid was collected by filtration, washed with water and ethyl acetate, and dried to give the title compound (0.49 g, yield 45%) as colorless crystals. melting point 178-180° C.

1. customat 0° C.
2. additionwas added
3. extractionthe mixture was extracted with ethyl acetate
4. washThe ethyl acetate layer was washed with saturated brine
5. dry with materialdried (MgSO4)
6. addition4N Hydrogen chloride-ethyl acetate solution was added to the ethyl acetate layer
7. filtrationthe precipitated solid was collected by filtration
8. washwashed with ethyl acetate
9. stirringthe mixture was stirred for 30 min
10. filtrationThe solid was collected by filtration
11. washwashed with water and ethyl acetate
12. customdried

ORD record

ord-00f82daa47d84bcbbf4a199d8b8bdd8c

Source dataset

uspto-grants-2010_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07652133B2