Synthesis Of Novel Pyrido Research Articles

Novel synthesis of pyrido[2,1‐f]‐as‐triazinium system and its zwitterionic derivatives. Different reactivities of 1‐ and 3‐olates with electrophiles

AbstractA novel convenient synthesis of the title system has been developed using α‐carbonyl derivatives of N‐aminopyridine and formamide (and its substituted derivatives) in the presence of phosphorus oxychloride or boron trifluoride. Quaternization of zwitterionic 1‐ and 3‐olates (4a, 4b; 11) with soft and hard methylating agents has been studied. Mechanistic suggestion are given to explain the formation of the different (solely N‐Me; N‐Me and O‐Me; solely OMe) products.

A novel synthesis of pyrido[2,3‐α]indolizine

AbstractThe synthesis of a new pyridoindolizine, in particular, pyrido[2,3‐α]indolizine, was carried out using 2‐methyl‐3‐t‐butoxycarbonyl‐4‐aminopyrrole as the starting material.

A Novel Synthesis of Pyrido[2,3-d]pyrimidines by Reaction of Uracils with 6-Aminouracils via Pyrimidine-to-Pyridine Transformation

A Novel Synthesis of Pyrido[2,3-d]pyrimidines by Reaction of Uracils with 6-Aminouracils via Pyrimidine-to-Pyridine Transformation