Strategies for the synthesis of HBGl3 , a glutamic acid derived ligand bearing phenolic and azacarboxylate donor groups at the nitrogen atom
作者:Raminder S. Mulla、Melissa T. Walden、Dmitry S. Yufit、Tanya Desa、Elena Lurie-Luke、J.A. Gareth Williams
DOI:10.1016/j.tet.2017.09.032
日期:2017.11
The development of a route applicable to the preparation of acyclic glutamic acid-based chelating ligands bearing two different auxiliary donor groups linked to the nitrogenatom by methylene spacers is described and applied to the synthesis of the new polydentate ligand HBGl3, the first example of such a structure. The synthesis is accomplished using a strategy employing reductive amination and t-butyl
Tandem radical-electrophilic annulations to pyrrole
作者:Jeffrey H. Byers、Anne DeWitt、Christopher G. Nasveschuk、John E. Swigor
DOI:10.1016/j.tetlet.2004.07.037
日期:2004.8
Annulations to pyrrole arising from atom-transfer radical substitution, followed by electrophilic cyclization have been developed. These annulations provide for novel entries into the azabicyclo-[3.3.0] and azabicyclo-[3.4.0] ring systems.