Use of 3-(trifluoromethyl)-1H-pyrazolo-[3,4-b]pyridine as a versatile building block

A one-pot multigram synthesis of 3-(trifluoromethyl)-1H-pyrazolo[3,4-b]pyridine starting from 2-fluoropyridine using directed ortho metallation (DoM) technique is described. The compound contains an anionically activatable trifluoromethyl group and is a versatile building block for the microwave assisted synthesis of 3-substituted 1H-pyrazolo[3,4-b]pyridines.