2-Vinyl quinazoline 3-oxides; Preparation from acid induced cyclocondensation of 2-acylaminoaryloximes
作者:Frances Heaney、Elaine Lawless
DOI:10.1002/jhet.5570440311
日期:2007.5
2-Vinylquinazoline3-oxides 6a, 6b and 15a are useful modular building blocks for the construction of a range of heterocycles with potential biological activity, from o-[amidoalkenyl]aryloximes 5a, 5b and 14a, respectively, by cyclocondensation. Conjugate addition of EtOH or MeOH to the vinyl moiety of 6b is demonstrated.
structures of 8a and 10a have been confirmed by X-ray crystallographic analysis. The aldonitrone 1c also reacts with N-methylmaleimide and with phenyl vinyl sulfone to furnish the first examples of primary cycloaddition products from quinazoline 3-oxides.