Abstract
The cobalt–salen complex (C1:[(salen)Co3+(OAc)]; salen= N,N′-bis(salicylidene)ethylenediamine, OAc=acetate) was found to efficiently promote the hydration of terminal alkynes to give methyl ketones in the presence of the H2SO4 cocatalyst. In addition, the one-pot transformation of alkynes into chiral alcohols through tandem catalysis by catalyst C1 coupled with a ruthenium–TsDPEN complex (C3: [(R,R-TsDPEN)Ru2+(cymene)]; TsDPEN=(1R,2R)-N-(p-toluenesulfonyl)-1,2-diphenylethylenediamine, cymene=1-methyl-4-(1-methylethyl)benzene) catalyst was realized with excellent yields and enantioselectivities.
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