<b>Reaction of propargyltrimethylsilane magnesium bromide with aldimines: Synthesis of 1-(alkylamino)-2-(trimethylsilyl)but-3-yne</b>

The reaction of propargylsilane magnesium bromide with aldimines provides in some cases, an isomeric mixture of three acetylenic amines <b>1</b>, <b>2</b>, <b>3</b> (<b>1</b> and <b>2</b>, as major products). The reaction has great potential and has been exploited for an efficient synthesis of the pure amine <b>2</b>