Stereoselective Addition of 2-Phenyloxazol-4-yl Trifluoromethanesulfonate to <i>N</i>-Sulfinyl Imines: Application to the Synthesis of the HCV Protease Inhibitor Boceprevir
作者:William J. Morris、Kiran K. Muppalla、Cameron Cowden、Richard G. Ball
DOI:10.1021/jo301856f
日期:2013.1.18
The stereoselective addition of 2-phenyloxazol-4-yl trifluoromethanesulfonate to N-sulfinylimines is described. Vinyl anions derived from enol triflate 2 undergo 1,2-addition with a variety of aldimines to afford the corresponding secondary sulfonamides as single diastereomers. The absolute stereochemistry was confirmed by X-ray crystallography which provides support that the reaction proceeds through
描述了将2-苯基恶唑-4-基三氟甲磺酸盐立体选择性加成到N-亚磺酰亚胺中。衍生自烯醇三氟甲磺酸酯2的乙烯基阴离子与各种醛亚胺进行1,2-加成反应,得到相应的仲磺酰胺,为单一非对映异构体。X射线晶体学证实了绝对立体化学,这提供了反应通过开放的,非螯合的过渡态进行的支持。该方法已经应用于蛋白酶抑制剂博西普韦的酮酰胺片段的合成。