Easy one-pot conversion of 2-chlorohydrazone into 2-oxohydrazone derivatives 2-azidohydrazone intermediates
作者:Orazio A. Attanasi、]Franco Serra-Zanetti、Zhiyuan Liao
DOI:10.1016/s0040-4020(01)88536-7
日期:1992.3
The simple, mild and selective conversion in good yields of 2-chlorohydrazone into 2-oxohydrazone derivatives is reported. The reaction easily occurs via 2-azidohydrazone intermediates and represents a convenient procedure for the useful transformation of the methylene into carbonyl group.
Vors, Jean-Pierre, Journal of Heterocyclic Chemistry, 1991, vol. 28, # 4, p. 1043 - 1046
作者:Vors, Jean-Pierre
DOI:——
日期:——
The Cu(OTf)2 catalysed microwave assisted synthesis of a new scaffold, 7-aryl-7,8-dihydropyrido[4,3-c]pyridazin-5(6H)-one
作者:Koen Muylaert、Sven Mangelinckx、Martyna Jatczak、Laurens M. De Coen、Kristof Van Hecke、Christian V. Stevens
DOI:10.3998/ark.5550190.p008.934
日期:——
The synthesis of novel 7-aryl-7,8-dihydropyrido[4,3-c]pyridazin-5(6H)-ones is described including a one-step Mannich-type reaction followed by intramolecular ring closure of ethyl 3-methylpyridazine-4- carboxylate and aldimines, catalysed by the Lewis acid Cu(OTf)2 under microwave heating. This synthesis opens up possibilities to access this unexplored scaffold for medicinal chemistry.