Y. Kawai, J. Kunitomo, A. Ohno
Dec 2, 1996
Citations
0
Influential Citations
3
Citations
Journal
Tetrahedron Letters
Abstract
Abstract 10-(4- tert -Butylphenyl)-3-(2-ethylphenyl)pyrimido[4,5- b ]quinoline-2,4(3 H ,10 H )-dione affords a 1:1:1 crystalline inclusion complex with urea and ethanol. It is observed that the lengths of the conjugated bonds, N(1)-C(10a)-C(4a)-C(5), which participate in redox reactions are changed significantly through hydrogen bonding at the pyrimidine ring.