2,2′-Biphenol is an organic compound with the formula (C6H4OH)2.

A white solid, it is a precursor to diphosphite ligands that are used to support industrial hydroformylation catalysis.

[1][2] The chemical can be made by a hydrolysis reaction that opens the central ring of dibenzofuran.

Alternatively, it can be produced from 2,4-di-tert-butylphenol in two steps.

The first step entails oxidative coupling to give the 2,2′-biphenol with four tert-butyl substituents.