Formation of 3-azabicyclo[3.3.1]non-3-enes: imino amides vs. imino alkenes
摘要:
An effective method for synthesising alkaloidlike compounds containing the 3-azabicyclo[3.3.1]non-3-ene core structure was successfully carried out in a stereo-selective manner via the bridged-Ritter reactions. Important optically active 6-alkyl(aryl)amido-4-alkyl(aryl)-2,2,6-trimethyl-3-azabicyclo[3.3.1]non-3-enes (imino amides) and 4-alkyl(aryl)-2,2,6-trimethyl-3-azabicyclo[3.3.1]nona-3,6-dienes (imino alkenes) were obtained in one step from (-)-beta-pinene and the respective nitriles in the presence of concentrated H2SO4. The relative compositions of these products were controlled by varying the reaction conditions. Kinetic studies were conducted to enable a mechanistic understanding of the reaction pathways.
An alkaloid-like 3-azabicyclo[3.3.1]non-3-ene library obtained from the bridged Ritter reaction
作者:Steven G. Williams、Mohan Bhadbhade、Roger Bishop、Alison T. Ung
DOI:10.1016/j.tet.2016.11.057
日期:2017.1
diverse library of novel alkaloid-like compounds was synthesised using the bridged Ritterreaction with (−)-β-pinene and subsequent scaffold derivatisation. Structural diversity was achieved by varying the nitrile used in the reaction and thus provided an understanding of the influence nitriles have on the reaction outcome; it was determined that more nucleophilic nitriles, gave higher yields. Steric
Formation of 3-azabicyclo[3.3.1]non-3-enes: imino amides vs. imino alkenes
作者:Alison T. Ung、Steven G. Williams、Alexander Angeloski、Jason Ashmore、Unnikrishnan Kuzhiumparambil、Mohan Bhadbhade、Roger Bishop
DOI:10.1007/s00706-014-1185-x
日期:2014.6
An effective method for synthesising alkaloidlike compounds containing the 3-azabicyclo[3.3.1]non-3-ene core structure was successfully carried out in a stereo-selective manner via the bridged-Ritter reactions. Important optically active 6-alkyl(aryl)amido-4-alkyl(aryl)-2,2,6-trimethyl-3-azabicyclo[3.3.1]non-3-enes (imino amides) and 4-alkyl(aryl)-2,2,6-trimethyl-3-azabicyclo[3.3.1]nona-3,6-dienes (imino alkenes) were obtained in one step from (-)-beta-pinene and the respective nitriles in the presence of concentrated H2SO4. The relative compositions of these products were controlled by varying the reaction conditions. Kinetic studies were conducted to enable a mechanistic understanding of the reaction pathways.