Résumé The low transition temperature mixture formed by lactic acid and choline chloride proved to be effective for an umpolung carbonsulfur bond formation at the α-position of α-chloro oximes. Aliphatic, aromatic, and heteroaromatic thiolate and sulfinate ions can be smoothly added to in situ–derived nitrosoalkenes affording the corresponding sulfenylated or sulfonylated adducts, respectively, in a very good yield (up to >98%). This methodology offers the advantage of working at room temperature and under air in biodegradable and cost-effective reaction mixtures, which can be used both as solvents and catalysts (20 mol %), thereby avoiding the use of anhydrous, hazardous volatile organic solvents and an inert atmosphere. Supplementary Materials: Supplementary material for this article is supplied as a separate file: mmc1.pdf &
摘要
乳酸和
胆碱氯化物形成的低转化温度混合物,在α-
氯肟α位形成碳
硫键反位有效。脂肪族、芳香族及杂芳香族
硫醇盐和亚
磺酸盐离子可以顺利地与原位衍生亚硝基烯烃加成,分别得到相应的亚
硫酰化或磺酰化加合物,产率非常良好(高达>98%)。该方法具有在室温及空气中进行、使用可
生物降解、成本效益反应混合物的优势,既可用作溶剂,也可作为催化剂(20mol%),从而避免了使用无
水、危险的易挥发有机溶剂及无气气氛。
补充材料: 本文的补充材料单独提供了一个文件:mmc1.pdf &