In the last few years, increasing attention has been paid to the imidazo[1,5-a]pyridine nucleus^[1]. The imidazo[1,5-a]pyridines are an important class of heterocyclic compounds owing to their photophysical and biological properties. They have found utility in a number of areas of research including potential applications in organic light-emitting diodes (OLED) and thin-layer field effect transistors (FET). In addition they have been investigated in a wide range of potential pharmaceutical applications, including HIV-protease inhibitors, and Thromboxane A2 synthesis inhibitors^[2-6].

A series of medicinal products containing imidazo[1,5-a]pyridine has been firmly
incorporated in medical practice.