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We describe herein an alternative method to prepare 2-organylselenopheno[2,3-b]pyridines starting from bis(3-amino-2-pyridyl) diselenide and aryland alkylacetylenes in the presence of BuONO in CH3NO2 as solvent. The reactions were conducted at 80 °C for 2 hours, and six selenopheno[2,3-b]pyridine derivatives were obtained in satisfactory yields, ranging from 10% to 41%. Using the same conditions, but in the absence of the alkyne counterpart, three new 1,6-diazaselenanthrenes were obtained with yields ranging from 41% to 47%. These compounds are unknown in the literature.

Synthesis of 2-organylselenopheno[2,3-b]pyridines and 1,6-diazaselenanthrenes via radical cascade reactions using tert-butyl nitrite