The uncatalyzed ring opening of the hetaryloxides 1, 2 and 3 with benzylamine and trimethylsilylazide has been studied being the observed regioselectivity different depending on the nucleophile used.
CARISSIMI M.; PICCIOLA G.; RAVENNA F.; CARENINI G.; GENTILI P., FARMACO. ED. SCI., 1980, 35, NO 10, 812-825
作者:CARISSIMI M.、 PICCIOLA G.、 RAVENNA F.、 CARENINI G.、 GENTILI P.
DOI:——
日期:——
A simple two-step synthesis of 2-(alkylamino)-1-arylethanols, including racemic adrenaline, from aromatic aldehydes via 5-aryloxazolidines
作者:Vladimir S. Moshkin、Vyacheslav Ya. Sosnovskikh
DOI:10.1016/j.tetlet.2013.08.083
日期:2013.10
Benzaldehydes react smoothly with nonstabilized azomethine ylides, generated in situ from sarcosine/formaldehyde or N-(methoxymethyl)-N-(trimethylsilylmethyl)benzylamine, to give 5-aryloxazolidines as intermediates. These were converted into 2-(alkylamino)-1-arylethanols in good yields by simple heating in methanol with hydrochloric acid, or by treatment with hydrazine hydrate in ethanol.