V. Dorokhov, M. Present
May 1, 1994
Citations
0
Influential Citations
2
Citations
Journal
Russian Chemical Bulletin
Abstract
A scheme for synthesizing 5,6,7,8-tetrahydroquinazoline systems from ketene aminal1via its diphenylboron chelate2 has been suggested. The interaction ofp-toluamidine with the condensation product of the chelate with dimethylformamide dimethylacetal results in the formation of 8-(N-benzoyldiaminomethylene)-2-p-tolyl-5,6,7,8-tetrahydroquinazoline-7-one, which is easily debenzoylated by sodium ethoxide. 8-Diaminomethylene-5,6,7,8-tetrahydroquinazolinone derivatives can be used for the preparation of boron chelate complexes.