Synthesis of nitrogen and sulfur macrocycles with cis exogenous oxygen and sulfur donor atoms
作者:Vivienne A. White、Nicholas J. Long、Neil Robertson
DOI:10.1039/b510734b
日期:——
2 + 2 cyclisation reactions with exogenous-O2 or S2 respectively. Alkylation of preformed exogenous-O2 macrocycles was explored and led to alkyl substitution at the secondary amine nitrogens in the ring, however synthesis of these species was overall lower yielding than cyclisation using alkylated tetraamine precursors. Thionation of an exo-O2 macrocycle using an analogue of Lawesson's Reagent led to