57697-75-3Relevant academic research and scientific papers
Highly diastereo- and enantioselective silver-catalyzed double [3+2] cyclization of α-imino esters with isocyanoacetate
Shao, Pan-Lin,Liao, Jia-Yu,Ho, Yee Ann,Zhao, Yu
supporting information, p. 5435 - 5439 (2014/06/09)
Presented herein is a new complexity-generating method in which both functionalities of α-imino esters undergo stereoselective cyclization with isocyanoacetates to produce directly linked oxazole-imidazolines, which can be transformed into highly functionalized α,β-diamino esters and imidazolinium salts in high diastereo- and enantiopurity. Double up: An unprecedented silver-catalyzed title reaction has been developed and provides access to directly linked oxazole-imidazolines. A highly diastereo- and enantioselective variant was also realized using the catalyst Ag/L*. The products can be easily transformed into highly functionalized chiral α,β-diamino esters or imidazolinium salts which are useful motifs in asymmetric synthesis and catalysis.
