Effective strategy for the systematic synthesis of hydrazine derivatives
作者:Aleksei Bredihhin、Uno Mäeorg
DOI:10.1016/j.tet.2008.04.096
日期:2008.7
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.
Regioselective Synthesis of 1-Alkyl-1-phenylhydrazines, 2-Alkyl-1-phenylhydrazines, and 1,2-Dialkyl-1-phenylhydrazines
1,2- and 1,1-Disubstituted and 1,1,2-trisubstituted hydrazines are obtained by reaction of (2-phenylhydrazino)triphenylphosphonium bromide with buthyllithium, followed by addition of alkyl halides and alkaline hydrolysis.
Copper(I)‐Catalyzed Synthesis of Chlorinated Tetrahydropyridazin‐3‐ones and 1,2‐Diazepan‐3‐ones from
<i>N</i>
‐Allyl‐
<i>N</i>
′‐trichloroacetylhydrazines
作者:Ram N. Ram、Vineet Kumar Soni
DOI:10.1002/adsc.201500876
日期:2016.1.21
The synthesis of chlorinated tetrahydropyridazin‐3‐ones and 1,2‐diazepan‐3‐ones has been developed. The present paper describes the application of Cu(I)‐catalyzed ATRC for the synthesis of heterocyclic molecules containing two heteroatoms (i.e., nitrogen) in the ring for the first time. An easy separation of the individual compounds from the product mixture could be achieved by considering their s