496935-53-6Relevant articles and documents
A facile synthesis of annulated 2,2′-bipyridine ligands with alkylsulfanyl and alkylsulfonyl substituents in the 6 and 6' positions [1]
Branowska,Kielak
, p. 1149 - 1155 (2007/10/03)
3,3′-Bis(isopropylsulfanyl)-5,5′-bi-1,2,4-triazine 2 is easily transformed into annulated 2,2′-bipyridines 4 and 6 with fused cycloalkene rings via [4+2]cycloaddition/retro cycloaddition reaction with cyclic enamines 3a-d. Oxidation of 4 and 6 with potassium permanganate under phase transfer catalysis conditions provided a series of the corresponding sulfonyl derivatives 7 and 8.