Synthesis of α,β-Unsaturated Aldehydes Based on a One-Pot Phase-Switch Dehydrogenative Cross-Coupling of Primary Alcohols

Mura M;De Luca L;Taddei M;Williams J. M. J;PORCHEDDU, ANDREA

2014-01-01

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Abstract

An efficient one-pot ruthenium-catalyzed hydrogen-transfer strategy for a direct access to alpha,beta-unsaturated aldehydes has been developed. The employment of enolates prepared in situ from alcohols avoided handling unstable aldehydes and provided a very appealing route to different cinnamaldehydes substituted in position 2. A silica-grafted amine was used as phase-switch tag leading to a selective one-pot process in favor of cross-dehydrogenative coupling products.