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.
Efficient Synthesis of the Azabicyclo[3.3.1]nonane Ring System in the Alkaloid Methyllycaconitine Using Bis(alkoxymethyl)alkylamines as Aminoalkylating Agents in a Double Mannich Reaction
作者:Margaret A. Brimble、Constanze Brocke
DOI:10.1002/ejoc.200500003
日期:2005.6
The doubleMannichreaction of cyclic β-keto esters with bis(alkoxymethyl)alkylamines provides an efficient and versatile method for the construction of azabicyclo[3.3.1]nonanes and azabicyclo[3.2.1]octanes. The optimum conditions for efficientreaction involve use of the activator trichloromethylsilane in acetonitrile as solvent at ambient temperature. The utility of this synthetic method is further