POSCHENRIEDER, HERMANN;STACHEL, HANS-DIETRICH, ARCH. PHARM., 322,(1989) N, C. 301-302
作者:POSCHENRIEDER, HERMANN、STACHEL, HANS-DIETRICH
DOI:——
日期:——
Reduktone von Maleinimiden.Reductones of Maleinimides
作者:Hermann Poschenrieder、Hans-Dietrich Stachel
DOI:10.1002/ardp.19893220514
日期:——
Synthesis of pyrrolo[3,4-<i>c</i>]pyridazines
作者:Hermann Poschenrieder、Hans-Dietrich Stachel
DOI:10.1002/jhet.5570320507
日期:1995.9
We have prepared the pyrrolopyridazines 7a-f starting from the diazo compounds 4. The synthesis involves a tandem condensation-aza-Wittig reaction or a combination of Wittig and aza-Wittig reactions as key steps. Reaction of pyridazine 7d with diazomethane results in C-methylation to yield 7g. Sodium borohydride reduces 7d to either the dihydropyridazine 12 or the hydroxylactam 13b depending of the