Scalable Synthesis of β-Amino Esters via Reformatsky Reaction with N-tert-Butanesulfinyl Imines
作者:Kristin Brinner、Daniel Poon、Brandon Doughan
DOI:10.1055/s-0028-1087964
日期:2009.4
The Reformatsky reagents derived from ethyl bromoacetate and tert-butyl bromoacetate add cleanly, in high yield, and with good diastereoselectivity to N-tert-butanesulfinyl aldimines and ketimines. Importantly, this reaction scales well (>50 mmol), and affords products upwards of 70% yield over three steps, starting from commercially available N-tert-butanesulfinamide, aldehydes, and ketones.
由溴乙酸乙酯和溴乙酸叔丁酯衍生的 Reformatsky 试剂可干净、高收率地添加到 N-叔丁烷亚磺酰基醛亚胺和酮亚胺中,并具有良好的非对映选择性。重要的是,该反应可以很好地扩展(> 50 mmol),并且从市售的 N-叔丁烷亚磺酰胺、醛和酮开始,经过三个步骤,产品的产率高达 70%。