A novel mesoionic ring system: unusual cyclization of thio- and amino-acid derivatives of 6-azauracil
作者:Frederick J. Lakner、Haiji Xia、Azra Pervin、Jeffrey R. Hammaker、Kathy G. Jahangiri、Michael K. Dalton、Alexander Khvat、Alexander Kiselyov、Alexandre V. Ivachtchenko
DOI:10.1016/j.tetlet.2005.06.032
日期:2005.8
Novel mesoionic heterocyclic structures 8 have been obtained via the internal cyclization of thio- and amino-acid derivatives of 6-azauracil 7b–d. These compounds undergo ring-opening reactions with amines to yield the respective 6-azauracil amides (9) in good yields under microwave irradiation.