Pyridine → 2-{4-[5-(4-Chlorophenyl)pyrazin-2-ylethynyl]phenoxy}ethyl methanesulfonate

0.62 mL (7.98 mmol) of methanesulfonic acid chloride was added dropwise at RT to a solution of 700 mg (2.00 mmol) of 2-{4-[5-(4-chlorophenyl)pyrazin-2-ylethynyl]phenoxy}ethanol and 0.65 mL (7.98 mmol) of pyridine in 20 mL of DCM and the mixture was then stirred overnight at RT. After the addition of another 0.33 mL (3.99 mmol) of pyridine and 0.32 mL (4.12 mmol) of methanesulfonic acid chloride, the reaction mixture was stirred for a further 2 hours at RT in the ultrasound bath. The solution was diluted with 30 mL DCM, and the organic phase was separated off, washed three times with 60 mL of water, and dried over magnesium sulfate. After the desiccant and solvent had been eliminated, the residue was purified by chromatography (silica gel, DCM). Yield: 600 mg (70% of theoretical); C21H17ClN2O4S (M=428.889); calc.: molpeak (M+H)+:429/431 (Cl); found: molpeak (M+H)+:429/431 (Cl); Rf value: 0.30 (silica gel, DCM/MeOH 9:1).

1. stirringthe reaction mixture was stirred for a further 2 hours at RT in the ultrasound bath
2. customthe organic phase was separated off
3. washwashed three times with 60 mL of water
4. dry with materialdried over magnesium sulfate
5. customthe residue was purified by chromatography (silica gel, DCM)

ORD-Eintrag

ord-50fd1c17ed094f2bb6cdc21cfdd0379b

Quelldatensatz

uspto-grants-2009_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07592358B2