Taking into account that heteroaromatic rings have widely been adopted as one of the most privileged core structures of drugs in the market, their efficient chemical transformations have received a great deal of attention in the field of organic and medicinal chemistry. 1 In particular, extensive efforts have been devoted to handle effectively pyrimidine and purine analogs in the area of medicinal chemistry. 2 An alkylsulfanyl group such as methylsulfanyl group, widely been ...