A first synthesis of 8- and 8,10-substituted barbiturils and their thio analogues
作者:Vladimir V. Baranov、Aleksandra B. Ivanova、Natal’ya G. Kolotyrkina、Angelina N. Kravchenko
DOI:10.1016/j.mencom.2019.01.032
日期:2019.1
Multicomponent condensations of alkyl(thio)ureas, formaldehyde and (thio)barbituric acids afford new spiro heterocyclic compounds, viz., 8- and 8,10-substituted 2,4,8,10-tetraazaspiro[5.5]undecane-1,3,5,9-tetraones (barbiturils) and their thio analogues.