Synthesis of 2-Alkylsulfanyl-6-amino-4-aryl-5-cyanonicotinonitriles by Recyclization of 2,6-Diamino-4-aryl-3,5-dicyano-4Н-thiopyrans with Alkyl Halides

2,6-Diamino-4-aryl-3,5-dicyano-4Н-thiopyrans in DMF in the presence of bases recycle into pyridine derivatives. After adding of haloalkanes diverse 2-(alkylsulfanyl)-6-amino-4-aryl-5-cyano-nicotinonitriles are formed. © 2018, Pleiades Publishing, Ltd.