Aliphatic Oxaboroles Enabling Remarkable Recognition of Diols

5-Membered ring aliphatic oxaboroles revealed unique characteristics in their reactivity with diols. The aliphatic oxaborole derivatives exhibited a higher complexation activity for Alizarin Red S than phenyl-, alkylboronic acid, benzoxaborole, and oxaborin. Furthermore, the sugar recognition ability depended on the chirality of the aliphatic boroles.