Tetrahydrofuran → tert-Butyl 3-[4-cyclopropyl-5-(3-isobutylcyclobutyl)isoxazol-3-yl]-5-hydroxyvalerate

Participants

Reaction Steps

tert-Butyl 5-(tert-butyldiphenylsilanyloxy)-3-[4-cyclopropyl-5-(3-isobutylcyclobutyl)isoxazol-3-yl]valerate (17.62 g) and tetrahydrofuran (106 mL) were mixed. After an addition of acetic acid/water=4/1 (2.45 mL) and tetrabutylammonium fluoride (1 M in tetrahydrofuran) (39.2 mL) to the solution at ice temperature, the mixture was stirred at RT overnight. The reaction mixture was concentrated in vacuo and purified by silica gel column chromatography (Eluent: ethyl acetate/hexane=1/6→1/2) to give the title compound (11.82 g).

Provenance & Evidence