Effect of iminic nitrogen substituents on [4+2] versus [3+2] cycloaddition pathways in reactions of nitrosoalkenes with simple acyclic imines: an experimental and theoretical investigation
作者:Alka Marwaha、P.V. Bharatam、M.P. Mahajan
DOI:10.1016/j.tetlet.2005.08.142
日期:2005.11
The results of experimental and theoreticalinvestigations on the mechanism of competitive [3+2] versus [4+2] cycloadditionreactions of simple acyclic imines with nitrosoalkenes are reported. The effect of substituents on the iminic nitrogen in influencing the cycloaddition pathways has been meticulously explored.
PASS-predicted design, synthesis and biological evaluation of cyclic nitrones as nootropics
作者:Alka Marwaha、R.K. Goel、Mohinder P. Mahajan
DOI:10.1016/j.bmcl.2007.06.071
日期:2007.9
Out of 400 virtually designed imidazoline N-oxides, five cyclic nitrones were selected on the basis of PASS prediction as potent nootropics and were evaluated for their biological activities in albino mice. The selected N-alkyl and aryl-substituted nitrones were found to be excellent nootropics. A series of lead compounds acting as cognition enhancers have been provided, which can be further exploited in search Of Such New Chemical Entities (NCEs). (c) 2007 Elsevier Ltd. All rights reserved.
An in-depth analysis of the effect of substituents on imines in cycloaddition reactions with nitrosoalkenes
作者:Alka Marwaha、Parvesh Singh、Mohinder P. Mahajan
DOI:10.1016/j.tet.2006.03.047
日期:2006.6
An in-depth experimental and theoretical analysis of the reactions of simple acyclic imines with nitrosoalkenes is reported. The effect of the substituents on nitrogen as well as carbon atom of imines on the cycloaddition pathways followed is systematically explored. The reactions of various functionalized imines with nitrosoalkenes leading to the formation of imidazoles and imidazole-N-oxides have