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36.1.7.3.6 Variation 6: Addition of Allylic Indium Reagents

DOI: 10.1055/sos-SD-036-00193

Frost, C. G.; Le Nôtre, J.Science of Synthesis, (200836327.

The first example of a Barbier-type addition of allyl halides to carbonyl compounds mediated by indium was reported in 1988.[‌360‌] Since then a wide variety of allylic substrates gave been utilized in the addition of allylic indium reagents to aldehydes and ketones.[‌361‌‌365‌] An unusual feature of the addition of allylic indium reagents is that the reactions are preferably performed in water or water-containing solvents. This is illustrated in the stereoselective indium-promoted allylations of β-hydroxy aldehydes in water.[‌366‌] The free hydroxy derivatives react with excellent diastereofacial control to afford anti-1,3-diols such as 121A (Scheme 68).

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