Catechol reaction with, phosgene

The smallest possible five-membered aromatic cyclic carbonate is a derivative of catechol benzo-l,3-dioxolan-2-one (o-phenylene carbonate) (1, Scheme 13). It was synthesized using three different methods the reaction of catechol with phosgene (or its dimer or trimer), ° the reaction of catechol with chloroformate, ° or by transesterification of catechol with diphenyl carbonate. ... 

Preparation. This substance is prepared by reaction of p-hydroxymethyl-phenylboronic acid, m.p. 194-195°, with excess phosgene in dry dioxane. It can be protected as the catechol complex, m.p. 135°. 

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