作者:K. A. Krasnov、V. G. Kartsev、V. N. Khrustalev
DOI:10.1023/a:1020983527851
日期:——
6-Methyl-4-methoxy-5,6,7,8-tetrahydro-2H-[1,3]dioxolo[4,5-g]isoquinolin-5-ol (cotarnine) and its derivatives, namely, 5-dihydrocotamyl-1,3-dimethylbarbituric acid, dihydro-cotarnylnitromethane, and dihydrocotarnylphenylacetonitrile, react with an excess of 1,3-dimethylbarbituric acid to give its 5,5-spiro derivative. The structure of the latter was proved by X-ray diffraction analysis A possible reaction mechanism was discussed.