Pyridinediols as HCI receptors; formation of an unusual pyridine·HCI complex in conjunction with the preparation of Lewis acidic titanium(IV) centres

Abstract
Reaction of Pyridinediols 1 with TiCl4 affords in one case an unusual dehydration–HCI complexation; in conjunction with these results, reaction of 1 with HCI indicates a strong affinity of these diols for (Lewis) acids.
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