Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University , Singapore 637371, Singapore.
Org Lett. 2013 Nov 15;15(22):5822-5. doi: 10.1021/ol402877n. Epub 2013 Oct 25.
An NHC-catalyzed activation of acetic esters to afford enolate intermediates is disclosed. The catalytically generated triazolium enolate intermediates serve as two-carbon nucleophiles that undergo highly enantioselective reactions with enones and α,β-unsaturated imines to give α-unsubstituted δ-lactones and lactams, respectively.
本文报道了一种 NHC 催化的乙酸酯的烯醇化反应。催化生成的三唑鎓烯醇化物中间体作为二碳亲核试剂,与烯酮和α,β-不饱和亚胺进行高度对映选择性反应,分别得到α-未取代的δ-内酰胺和内酰胺。