A New and Convenient Synthesis of 3(2H)-Pyridazinones by Reacting Carbanion of Ethyl Trimethylsilylacetate with Phenylhydrazones
摘要:
A one-pot synthesis of 5,6-disubstituted-2-phenyl-3(2H)-pyridazinones 4 is achieved on treatment of carbanion of ethyl trimethylsilylacetate with phenylhydrazones of 1,2-dicarbonyl compounds 1.
N-Heterocyclic Carbene-Catalyzed Oxidative Annulations of α,β-Unsaturated Aldehydes with Hydrazones: Selective Synthesis of Optically Active 4,5-Dihydropyridazin-3-ones and Pyridazin-3-ones
A novel and efficient method for the highly enantioselective synthesis of chiral 4,5-dihydropyridazin-3-one derivatives has been developed based on the chiral N-heterocycliccarbene-catalyzed oxidative annulation between α,β-unsaturated aldehydes and hydrazones. Meanwhile, the selective synthesis of either 4,5-dihydropyridazin-3-ones or pyridazin-3-one derivatives from the same reactants has been achieved
Bestmann, Hans Juergen; Schmid, Guenter; Sandmeier, Dieter, Chemische Berichte, 1985, vol. 118, # 4, p. 1709 - 1719
作者:Bestmann, Hans Juergen、Schmid, Guenter、Sandmeier, Dieter、Schade, Gerold、Oechsner, Helmut
DOI:——
日期:——
Stickstoff- und schwefelheterocyclen aus NH- und SH-aciden carbonylverbindungen und phosphacumulenyliden
作者:Hans Jürgen Bestmann、Günter Schmid、Dieter Sandmeier
DOI:10.1016/0040-4039(80)88002-6
日期:1980.1
Reaction of Triethyl Phosphonoacetate Anion with Phenylhydrazones: A New Method for the Preparation of 3(2<i>H</i>)-Pyridazinones
作者:Himatkumar V. Patel、Kavita A. Vyas、Sudhanshu P. Pandey、Francis Tavares、P. S. Fernandes
DOI:10.1080/00397919108019791
日期:1991.4
Various 5,6-disubstituted-2-phenyl-3(2H)-pyridazinones 4 have been synthesised by reacting triethyl phosphonoacetate anion with monophenylhydrazone of 1,2-dicarbonyl compounds 2.
BESTMANN H. J.; SCHMID G.; SANDMEIER D., TETRAHEDRON LETT., 1980, 21, NO 31, 2939-2942