A double Mannich approach to the synthesis of substituted piperidones—application to the synthesis of substituted E-ring analogues of methyllycaconitine
作者:Yinman Chan、Jared Balle、J. Kevin Sparrow、Peter D.W. Boyd、Margaret A. Brimble、David Barker
DOI:10.1016/j.tet.2010.06.084
日期:2010.8
The double Mannich reaction of acyclic α,γ-substituted β-keto esters and bis(aminol) ethers gives substituted 3,5-substituted-4-piperidones with high levels of diastereoselectivity. These piperdiones can be easily transformed into substituted E-ring analogues of the delphinium alkaloid methyllycacotine.
Application of a Double Mannich Reaction Using<i>Bis</i>(aminol) Ethers in the Synthesis of AE Ring Analogues of Methyl Lycaconitine
作者:Margaret A. Brimble、Constanze Brocke、Diana S.-H. Lin、Malcolm D. McLeod
DOI:10.1055/s-2004-831340
日期:——
An efficient method for the construction of azabicyclo[3.3. 1]nonanes and azabicyclo[3.2. 1]octanes is reported via double Mannich reaction of cyclic ketoesters with bis(aminol) ethers. This method is applied to the synthesis of AE ring analogues of methyl lycaconitine.
Double-Mannich Annulation of Cyclic Ketones Using <i>N</i>,<i>N</i>-Bis(ethoxymethyl)alkylamine Reagents
作者:Jill I. Halliday、Mary Chebib、Peter Turner、Malcolm D. McLeod
DOI:10.1021/ol061242s
日期:2006.7.1
N, N-Bis(ethoxymethyl) alkylamines function as effective reagents in the double-Mannich annulation of cyclic ketone substrates, providing efficient access to a series of azabicyclic ketones. These ring systems are a useful scaffold for the four-step synthesis of novel constrained homocholine analogues.
A New Strategy for the Synthesis of Bis(alkadiynyl)amines and Azacycloalkadiynes Using Copper-Containing Catalysts
An efficient method for the preparation of N-alkyl-N,N-di(alkadiynyl)amines and 1-alkyl-1-azacycloalkadiynes is developed via the aminomethylation reaction of ,-diacetylenes with N-alkyl-N,N-bis(ethoxymethyl)amines in the presence of copper halides as the catalysts.
Synthesis of N,N-bis(2-fluoro-2,2-dinitroethyl)-N-alkylamines