Methyl iodide → HCID 59151353, Verbindung

A mixture of 4-bromo-1-tosyl-1H-pyrrolo[2,3-b]pyridine (D20) (6 g, 17.08 mmol) in THF (100 ml) was cooled to −78° C. LDA (2M in THF) (21.35 mL, 42.7 mmol) was added at −78° C. and stirred at this temperature for ca. 1 hour. Iodomethane (2.136 ml, 34.2 mmol) was then added. After stirred at −78° C. for further ca. 30 min, the mixture was quenched by addition of saturated NH4Cl solution (150 mL), extracted with ethyl acetate (100 mL×3). The combined organics were dried over Na2SO4, filtered and concentrated. The residue was purified on normal phase chromatography eluting with a gradient of 0-30% ethyl acetate in cyclohexane to give the title compound containing impurities (5.4 g). LCMS (A): m/z (M+H)+ 365/367, C15H13BrN2O2S requires 364/366 (acidic).

1. stirringAfter stirred at −78° C. for further ca. 30 min
2. customthe mixture was quenched by addition of saturated NH4Cl solution (150 mL)
3. extractionextracted with ethyl acetate (100 mL×3)
4. dry with materialThe combined organics were dried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated
7. customThe residue was purified on normal phase chromatography
8. washeluting with a gradient of 0-30% ethyl acetate in cyclohexane

ORD-Eintrag

ord-7cfb568ffe784697875b21b78b1935ee

Quelldatensatz

uspto-grants-2014_11

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08877742B2