One-pot ipso-hydroxylation and ortho-/para-halogenation of (hetero)arylboronic acids under tungsten catalysis

The one-pot ipso -hydroxylation-(decarboxylative)-halogenation of (hetero)aryl boronic acids under mild conditions has been developed, in which the (hetero)aryl boronic acids also promoted the reaction by releasing B(OH) 3 as a Lewis acid for H 2 O 2 , hypohalite and tungsten catalyst.