Nitrogen → 2-[1-(Tert-butyl-dimethyl-silanyloxy)-ethyl]-5-chloromethyl-oxazole

Participants

Reaction Steps

In a flame dried round-bottomed flask equipped with a magnetic stir bar and under inert atmosphere (N2), a solution of {2-[1-(tert-butyl-dimethyl-silanyloxy)-ethyl]-oxazol-5-yl}-methanol (455 mg, 1.77 mmol) in dry CH2Cl2 (4.5 mL) was treated at 0° C. with Et3N (0.32 mL, 2.30 mmol) followed by DMAP (22 mg, 0.18 mmol) and Ms-Cl (0.17 mL, 2.12 mmol). After stirring at rt for 2 h, the reaction mixture was quenched with water (10 mL), extracted with CH2Cl2 (10 mL) and the combined org. extracts were dried over Na2SO4, filtered, and the solvents were removed under reduced pressure to give in a 2:1 ratio the title compound (LC-MS-conditions 02: tR=1.13 min, [M+H]+=276.06) along with methanesulfonic acid 2-[1-(tert-butyl-dimethyl-silanyloxy)-ethyl]-oxazol-5-ylmethyl ester (LC-MS-conditions 02: tR=1.07 min, [M+H]+=336.45) as a pale yellow oil.

Provenance & Evidence