Chiral α-allenols are prepared with high diastereocontrol through an unprecedented and spontaneous β-oxygen elimination of an α-epoxy vinyl boronate. Stochiometric experiments and DFT calculations support a dual role of the copper catalyst, which orchestrates the hydroboration and the syn-elimination step.

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Abstract. El Mirón Cave (Ramales de la Victoria, Cantabria, Spain) has evidence of brief visits (by hunting parties) to the montane zone of the upper Asón valley in easternmost Cantabria during the Last Glacial

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