Effective strategy for the systematic synthesis of hydrazine derivatives
摘要:
A new and efficient strategy for the systematic synthesis of hydrazine derivatives is reported. It allows the synthesis of up to tetrasubstituted hydrazine derivatives with minimal number of steps using only one protecting group or without any of them at all. Simple and readily available starting materials such as hydrazine hydrate or phenylhydrazine can be used. A variety of substrates were used to investigate scope and limitations of this strategy, additionally one full synthetic sequence was performed. (C) 2008 Elsevier Ltd. All rights reserved.
Pd-Catalyzed Regioselective Allylation of Mono- and Disubstituted Hydrazines
作者:Svetlana Tšupova、Uno Mäeorg
DOI:10.1021/ol4014798
日期:2013.7.5
Palladium-catalyzed allylation of hydrazines using allyl alcohols is reported. This highly efficient protocol furnishes monoallylated hydrazines selectively, in 27–99% yields. Following an optimization of the reaction conditions and of the Pd-ligands, the allylations of both mono- and disubstituted hydrazines were investigated, as well as the effects of C2-substitution on the allylating agent. Of particular