Effective synthesis of bis-bispidinone and facile difunctionalization of highly rigid macrocyclic tetramines
摘要:
An effective synthesis which provides facile access to highly rigid tetraazamacrocycles possessing labile functional groups is reported. Essential to the approach is bis-bispidinone, a versatile substrate which can be prepared from an unusually stable bispidine diethyl ketal building block and requires a non-aqueous isolation process. Further functionalization of the substrate allows direct and concurrent incorporation of functionalities onto the bis-bispidine tetraazamacrocyclic framework, in particular those that are labile during the macrocycle formation. (C) 2013 Elsevier Ltd. All rights reserved.
Effective synthesis of bis-bispidinone and facile difunctionalization of highly rigid macrocyclic tetramines
摘要:
An effective synthesis which provides facile access to highly rigid tetraazamacrocycles possessing labile functional groups is reported. Essential to the approach is bis-bispidinone, a versatile substrate which can be prepared from an unusually stable bispidine diethyl ketal building block and requires a non-aqueous isolation process. Further functionalization of the substrate allows direct and concurrent incorporation of functionalities onto the bis-bispidine tetraazamacrocyclic framework, in particular those that are labile during the macrocycle formation. (C) 2013 Elsevier Ltd. All rights reserved.