Synthesis of a γ-Lactam Library via Formal Cycloaddition of Imines and Substituted Succinic Anhydrides
作者:Darlene Q. Tan、Amy L. Atherton、Austin J. Smith、Cristian Soldi、Katherine A. Hurley、James C. Fettinger、Jared T. Shaw
DOI:10.1021/co2001873
日期:2012.3.12
Formal cycloaddition reactions between imines and cyclic anhydrides serve as starting point for the synthesis of diverse libraries of small molecules. The synthesis of succinic anhydrides substituted with electron-withdrawing groups is facilitated by new mild conditions for alkylation of aryl-substituted acetyl esters with ethyl bromoacetate. These anhydrides are then used in formal cycloaddition reactions
亚胺和环状酸酐之间的正式环加成反应是合成各种小分子文库的起点。新的温和条件促进了用吸电子基团取代的琥珀酸酐的合成,该条件为芳基取代的乙酰基酯与溴乙酸乙酯的烷基化提供了新的温和条件。然后将这些酸酐用于与亚胺的正式环加成反应中,以生成γ-内酰胺。2-氟-5-硝基苯基琥珀酸酐与亚胺有效反应,生成内酰胺,内酰胺进一步通过将硝基转化为苯胺和叠氮化物而进一步多样化,以分别与酰化剂和炔烃进行后续反应。首次报道了氰基琥珀酸酐的合成,