Ding Yuan, Han-Han Kong, M. Ding
Jan 21, 2015
Citations
0
Influential Citations
16
Citations
Journal
Tetrahedron
Abstract
Iminophosphoranes 3, obtained from the Baylis–Hillman adducts, reacted with 2-azidobenzoyl chloride to give the azides 4. The sequential reaction of azides 4 with triphenylphosphine and isocyanate produced 1H-pyrimido[2,1-b]quinazoline-2,6-diones 9 in the presence of sodium ethoxide via a tandem aza-Wittig/nucleophilic addition/intramolecular cyclization/isomerization reaction.