PROCESSES FOR PREPARING (AMINO-PYRAZOLOPYRIDINYL)METHOXY SUBSTITUTED BIARYL ETHERS

摘要

Processes for preparing certain (amino-pyrazolopyridinyl)methoxy-substituted biaryl ethers and their salts are described. The substituted biaryl ethers are useful as HIV non-nucleoside reverse transcriptase inhibitors. The processes include coupling a biaryl ether with a suitably protected and activated pyrazolopyridinyl methanol and then removing the protective groups from the coupled product to provide the desired substituted biaryl ether in the form of a sulfonate salt or a sulfate salt. Earlier reaction steps and the intermediates employed and obtained therein are also described. Crystalline HCl and sulfate salts of a particular (amino-pyrazolopyridmyl)-methoxy~substituted biaryl ether are described as well.