2,4-Dichloropyrimidine → tert-Butyl 4-(2-chloropyrimidin-4-yloxy)naphthalen-1-ylcarbamate

To a degassed solution of tert-butyl 4-hydroxynaphthalen-1-ylcarbamate (13.3 g, 51.3 mmol) and DBU (12.6 mL, 51.3 mmol) in MeCN (80 mL) under nitrogen was added 2,4-dichloropyrimidine (7.65 g, 51.3 mmol) in acetonitrile (19 mL) and the reaction mixture was heated to reflux for 4 hr. The solvent was evaporated in vacuo and the residue was taken up into DCM (100 mL) and was washed with water (2×100 mL) and brine (100 mL), then dried (MgSO4) and evaporated in vacuo. The residue was purified by flash column chromatography (SiO2, 330 g, EtOAc in isohexane, 0-50%, gradient elution) to afford the title compound as a pale pink solid (6.80 g, 34%); Rt 2.50 min (Method 2); m/z 372/374 (M+H)+, (ES+)+.

1. temperaturethe reaction mixture was heated
2. temperatureto reflux for 4 hr
3. customThe solvent was evaporated in vacuo
4. washwas washed with water (2×100 mL) and brine (100 mL)
5. dry with materialdried (MgSO4)
6. customevaporated in vacuo
7. customThe residue was purified by flash column chromatography (SiO2, 330 g, EtOAc in isohexane, 0-50%, gradient elution)

ORD-Eintrag

ord-7449f2539e8440288049f9602ea94c3b

Quelldatensatz

uspto-grants-2012_10

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08299074B2