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Under the conditions of ruthenium catalyzed transfer hydrogenation, 2-butyne couples to alcohols 1a–1j to deliver α,β-unsaturated ketones 3a–3j in good to excellent isolated yields with complete E-stereoselectivity. Under identical conditions, aldehydes 2a–2j couple to 2-butyne to provide an identical set of α,β-unsaturated ketones 3a–3j in good to excellent isolated yields with complete E-stereoselectivity...
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