反应详情

To a solution of 4-acetoxy-3,5-di-tert-butylbenzaldehyde (17.0 g, 0.0615 mol) in methanol (250 mL) was added isobutylhydroxylamine (5.36 g, 0.0609 mol) and concentrated hydrochloric acid (10 drops). Using a Dean-Stark trap, the resulting solution was refluxed until no more aldehyde was detected by TLC (Rf=0.23 for product and 0.84 for starting material using 3:1 hexanes/EtOAc) The solvent was removed in vacuo and the residue was a red oil which when triturated with hexanes it turned into solid. The solid was separated and washed completely with hexanes. The titled compound was isolated in 52.3% yield as a white solid, m.p. 176.8–180.4° C.

1. customwas removed in vacuo
2. customtriturated with hexanes it
3. customThe solid was separated
4. washwashed completely with hexanes