107471-07-8Relevant academic research and scientific papers
Regioselectivity in Methylation and Phenylation of the Zwitterionic Pyrido-as-triazinium-1- and 3-olates and thiolates
Batori, Sandor,Messmer, Andras
, p. 437 - 444 (2007/10/02)
Substituted derivatives of the title ring system have been synthesized and the regioselectivity in methylation and phenylation of the zwitterionic pyrido-as-triazinium-1- and 3-olates 4a-g and 10 and thiolates 7a,b and 12 has been studied by nmr te
Novel Synthesis of Pyrido-as-Triazinium System and its Zwitterionic Derivatives. Different Reactivities of 1- and 3-Olates with Electrophiles
Batori, S.,Juhasz-Riedl, Zs.,Sandor, P.,Messmer, A.
, p. 375 - 380 (2007/10/02)
A 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.Qauternization 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 O-Me) products.
