503863-99-8Relevant academic research and scientific papers
The synthesis of aromatic diazatricycles from phenylenediamine-bis(methylene Meldrum's acid) derivatives
Graf, Gabriele Ina,Hastreiter, Daniel,Da Silva, Luiz Everson,Rebelo, Ricardo Andrade,Montalban, Antonio Garrido,McKillop, Alexander
, p. 9095 - 9100 (2002)
The thermocyclisation of phenylenediamine-bis(methylene Meldrum's acid) derivatives has been investigated. Those of o-phenylenediamines give 1,10-phenanthroline derivatives, while those of m- and p-phenylenediamines lead to the preferential formation of angular diazatricycles. Thus, for example, the di-Meldrum's acid derivative of 2,5-dichloro-1,4-phenylenediamine gives, via ipso-substitution, the unexpected angular product 19.
