NEW METHODS OF BENZO[b] SELENOPHENES SYNTHESIS
A lot of potential applications of benzo[b]selenophenes as biologically active substances, new semiconductor materials, and intermediates in organic synthesis stimulate the devel- opment of new methods for their production. In this review we summarize and organize the data on the synthesis of benzo[b]selenophenes. The main attention was paid to the intramolecular cyclization of ortho-halogen-substituted aro- matic derivatives of selenium.