Anomalous role of molecular sieves 4A in the preparation of a binaphthol-derived active µ₃-oxo titanium catalyst

Abstract

The active species of binaphthol-derived titanium catalyst 1, which is used as an efficient catalyst for glyoxylate–ene reactions, is primarily composed of a µ₃-oxo (Ti₃O) species, for which the molecular sieves 4A employed in the catalyst preparation act as a H₂O donor.

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