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Reaction of 2-alkenyl-1,3,2-benzodioxaboroles, which are readily accessible by hydroboration of alkynes with catecholborane, with α,β-unsaturated ketones in the presence of rhodium/(S)-binap catalyst and triethylamine in dioxane/H 2 O (101) proceeded with high enantioselectivity at 100 o C to give high yields of optically active β-alkenyl ketones of over 90% ee. One pot synthesis of...
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