Heterocyclic ring-closure reactions. 8. Reactions of isothiocyanates with cyanothioformamides. Cyclization of 5-imino-4-thioxo-2-imidazolidones and 5-imino-2,4-imidazolidinedithiones to 5,7-dihydrodiimidazo[4,5-b:4',5'-e]pyrazine-2,6(1H,3H)-diones and -dithiones
KHATTAK, I.;KETCHAM, R.;SCHAUMANN, E.;ADIWIDJAJA, G., J. ORG. CHEM., 1985, 50, N 19, 3431-3434
作者:KHATTAK, I.、KETCHAM, R.、SCHAUMANN, E.、ADIWIDJAJA, G.
DOI:——
日期:——
Heterocyclic ring-closure reactions. 8. Reactions of isothiocyanates with cyanothioformamides. Cyclization of 5-imino-4-thioxo-2-imidazolidones and 5-imino-2,4-imidazolidinedithiones to 5,7-dihydrodiimidazo[4,5-b:4',5'-e]pyrazine-2,6(1H,3H)-diones and -dithiones