Asymmetric synthesis by chiral ruthenium complexes : IV. Reduction of carbon-carbon double bonds in prochiral α,β-unsaturated carboxylic acids by hydrogen transfer catalysed by H4Ru4(CO)8[(−)-DIOP]2期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Asymmetric synthesis by chiral ruthenium complexes : IV. Reduction of carbon-carbon double bonds in prochiral α,β-unsaturated carboxylic acids by hydrogen transfer catalysed by H4Ru4(CO)8[(−)-DIOP]2

Authors:	Mario Bianchi Ugo Matteoli Gloria Menchi Piero Frediani Franco Piacenti Carlo Botteghi

Affiliation:	Cattedra di Chimica lndustriale dell''Universitä di Firenze, via Gino Capponi, 9-50121 Firenze Italy;Istituto di Chimica Applicata dell''Uniuersitä di Sassari, via Vienna, 2-07100 Sassari Italy

Abstract:	The enantioface-discriminating hydrogen transfer reduction of αβ-unsaturaged acids takes place at 120°C in the presence of H₄Ru₄(CO)₈[()-DIOP]₂. Secondary alcohols are satisfactory hydrogen donors. Selectivity, optical yields, and rates are lower than those obtained when working in the presence of hydrogen under pressure.

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