The first uncatalyzed preparation of tetraaza[1.1.1.1]m,p,m,p-cyclophanes (symmetrical and unsymmetrical) gave access to previously unknown N(H)-bridged derivatives that could be further substituted. NMR studies and theoretical calculations show that these macrocycles adopt an 1,3-alternated conformation. (C) 2010 Elsevier Ltd. All rights reserved.
The first uncatalyzed preparation of tetraaza[1.1.1.1]m,p,m,p-cyclophanes (symmetrical and unsymmetrical) gave access to previously unknown N(H)-bridged derivatives that could be further substituted. NMR studies and theoretical calculations show that these macrocycles adopt an 1,3-alternated conformation. (C) 2010 Elsevier Ltd. All rights reserved.
作者:Mounia Touil、Jean-Manuel Raimundo、Mohammed Lachkar、Philippe Marsal、Olivier Siri
DOI:10.1016/j.tet.2010.03.114
日期:2010.6
The first uncatalyzed preparation of tetraaza[1.1.1.1]m,p,m,p-cyclophanes (symmetrical and unsymmetrical) gave access to previously unknown N(H)-bridged derivatives that could be further substituted. NMR studies and theoretical calculations show that these macrocycles adopt an 1,3-alternated conformation. (C) 2010 Elsevier Ltd. All rights reserved.