On heating with dialkyl-acetylenedicarboxylates in DMF condensed [1,2,4]-triazolo[4,3-b] pyridazine-6(5H)-one-3(2H)-thiones undergo unprecedented ring transformations yielding novel tetracyclic 1,3-diazepines and thiazolotriazole derivatives depending on the applied reaction temperature. The observed substrate selectivity was interpreted on the basis of the results of comparative theoretical calculations carried out at semiempirical level (AMI). (C) 2001 Elsevier Science Ltd. All rights reserved.
KOERMENDY, K.;KOVACS, T.;SZULAGYI, J.;FUFF, F.;KOEVESDI, I., ACTA CHIM. ACAD. SCI. HUNG., 1981, 108, N 2, 167-182
作者:KOERMENDY, K.、KOVACS, T.、SZULAGYI, J.、FUFF, F.、KOEVESDI, I.
DOI:——
日期:——
Kormendy, K.; Kovacs, T.; Szulagyi, J., Acta Chimica Academiae Scientiarum Hungaricae, 1981, vol. 108, # 2, p. 167 - 182
作者:Kormendy, K.、Kovacs, T.、Szulagyi, J.、Ruff, F.、Kovesdi, I.