Reductive Transformations of 6H‐1,2‐Oxazines with Hydride Reagents: Formation of Aziridines and 3‐Hydroxyalkylated 1,2‐oxazines

Abstract

Abstract6H‐1,2‐Oxazines 1 and 3 are converted into aziridines 2 and 4, respectively, by reduction with LiAlH4. Reduction of 1,2‐oxazine 5 lacking the 6‐alkoxy substituent leads to phenyl ketone 6, 6‐Alkoxy‐substituted 1,2‐oxazine‐3‐carboxylates 7, 9, and 11 are reduced with NaBH4 to give the corresponding 3‐hydroxymethylated compounds 8, 10, and 12 in good yields.