4-Methylmorpholine → HCID 69352349, Verbindung

Temperatur

0 °C

Uracil-5-ylacetic acid (34, 1.0 g, 5.9 mmol) was transferred to a round bottomed flask equipped with a septum through which a flow of nitrogen was applied. Dry DMF (10 ml) and N-methylmorpholine (1.9 ml, 17.6 mmol) were transferred to the flask and the mixture was cooled to 0° C. Ethyl N-(2-BOC-aminoethyl)glycinate (1.6 g, 6.5 mmol) and O-(3,4-dihydro-4-oxo-1,2,3-benzotriazin-3-yl)-N,N,N′,N′-tetramethyl uronium tetrafluoroborate (TDBTU, 2.5 g, 7.0 mmol) were added to the mixture. The reaction mixture was stirred for 3 hours at 0° C. and was then poured into ethyl acetate (300 ml). The resultant suspension was washed with saturated aqueous potassium hydrogen sulfate (2×50 ml), saturated aqueous sodium bicarbonate (2×50 ml) and with brine (1×50 ml). The organic phase was dried over magnesium sulfate, filtered and evaporated under reduced pressure. The residue was stirred overnight in dichloromethane (10 ml) and diethyl ether (40 ml). The resultant precipitate was isolated by filtration, washed once with diethyl ether and dried to give 1.13 g (48%) of the title compound as white crystals.

1. customequipped with a septum through which a flow of nitrogen
2. washThe resultant suspension was washed with saturated aqueous potassium hydrogen sulfate (2×50 ml), saturated aqueous sodium bicarbonate (2×50 ml) and with brine (1×50 ml)
3. dry with materialThe organic phase was dried over magnesium sulfate
4. filtrationfiltered
5. customevaporated under reduced pressure
6. stirringThe residue was stirred overnight in dichloromethane (10 ml)

ORD-Eintrag

ord-a9c8979bca2a448ebe8a765bb0b7c3c4

Quelldatensatz

uspto-grants-2002_08

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US06441130B1