Suzuki-type cross-coupling reaction of 3-iodoindazoles with aryl boronic acids: A general and flexible route to 3-arylindazoles

Article abstract of DOI:10.1016/S0040-4020(99)00324-5

This paper describes a Suzuki Type cross coupling reaction of 3- iodoindazoles with aryl and heteroaryl boronic acids as a general route to 3- arylindazoles. The coupling reaction is illustrated by the preparation of new aryl- or heteroarylindazoles 7. Scope and limitation of the method are outlined. The coupling reaction works best on a 1-substituted indazole nucleus. The usefulness of the reaction is illustrated by a short practical synthesis of YC-1, a pharmacological agent potentially useful for the treatment of cardiovascular diseases or erectile dysfunction.