Manganese carbonyl and phase transfer catalysed, stereospecific hydroacylation of allenes to α,β-unsaturated ketones

Abstract
Phase transfer (5 mmol dm–3 NaOH, CH2Cl2, cetyltrimethylammonium bromide) catalysed reaction of allenes with carbon monoxide, decacarbonyldimanganese and methyl iodide affords α,β-unsaturated ketones in a stereospecific process.