Synthesis with 1,2‐Oxazines. II. Synthesis and Properties of 2,3‐dimethyl‐5,6‐dihydro‐4<i>H</i>‐1,2‐oxaziniumiodide

Abstract

Abstract Preparation of 2,3‐Dimethyl‐5,6‐dihydro‐4 H ‐1,2‐oxaziniumiodide was achieved by N‐alkylation of 3‐methyl‐5,6‐dihydro‐4 H ‐1,2‐oxazine. Reactions with C‐nucleophiles led to the corresponding N‐methyl‐perhydro‐1,2‐oxazine derivatives. Reaction with sodium hydride in triglyme led to 3‐methyl‐4‐aza‐1,3‐pentadiene.