The hydroxyamination reagent Br-N-(CO2Me)(2) underwent Markovnikov addition to various olefins in the presence of catalytic BF3 center dot OEt2 and provides efficient access to aminoalcohols. The reaction provided the trans-1-bromo, 2-N-bis-carbamate adduct stereoisomer in all cases. The resulting adduct underwent cyclization to give an oxazolidinone, which could be readily hydrolyzed to an oxazolidin-2-one or an amino alcohol.
Organotellurium-mediated synthesis of oxazolidin-2-ones from alkenes
作者:Nan X. Hu、Yoshio Aso、Tetsuo Otsubo、Fumio Ogura
DOI:10.1039/c39870001447
日期:——
Phenyltellurinyl trifluoracetate in combination with ethyl carbamate and boron trifluoride–diethyl ether reacted with alkenes in refluxed 1,2-dichloroethane, regio- and stereo-selectively giving oxazolidin-2-ones in high yields.