Silyl Radical-Mediated Activation of Sulfamoyl Chlorides Enables Direct Access to Aliphatic Sulfonamides from Alkenes
作者:Sandrine M. Hell、Claudio F. Meyer、Gabriele Laudadio、Antonio Misale、Michael C. Willis、Timothy Noël、Andrés A. Trabanco、Véronique Gouverneur
DOI:10.1021/jacs.9b13071
日期:2020.1.15
However, sulfamoyl and sulfonyl chlorides can be easily activated by Cl-atom abstrac-tion by a silyl radical with similar rates. This later mode of acti-vation was therefore selected to access aliphatic sulfonamides applying a single-step hydrosulfamoylation using inexpensive olefins, tris(trimethylsilyl)silane and photocatalyst Eosin Y. This late-stage functionalization protocol generates molecules
氨磺酰氯的单电子还原比磺酰氯更具挑战性。然而,氨磺酰氯和磺酰氯可以很容易地通过甲硅烷基的 Cl 原子提取以相似的速率被激活。因此,选择这种后期的活化模式来获得脂肪族磺酰胺,使用廉价的烯烃、三(三甲基甲硅烷基)硅烷和光催化剂曙红 Y 进行单步氢氨磺酰化。这种后期功能化方案生成的分子与含磺酰胺的环丁基-直接用于药物化学的螺环吲哚。