Fluorous scavenger for parallel preparation of tertiary sulfonamides leading to secondary amines
作者:Emmanuel Baslé、Mickaël Jean、Nicolas Gouault、Jacques Renault、Philippe Uriac
DOI:10.1016/j.tetlet.2007.09.110
日期:2007.11
Alkylation of secondary sulfonamides by alkyl halides or alcohols (Mitsunobu reaction) is an efficient method for secondary amines preparation. However, its application to parallel chemistry is often difficult due to partial reaction. In this Letter, we propose a fluorous technique to bypass this problem. Thus, o-nitrobenzenesulfonamides were prepared and alkylated in parallel (Fukuyama method) with
通过烷基卤化物或醇将仲磺酰胺烷基化(Mitsunobu反应)是制备仲胺的有效方法。然而,由于部分反应,将其应用于平行化学常常是困难的。在这封信中,我们提出了一种荧光技术来绕过此问题。因此,制备了邻硝基苯磺酰胺,并与各种烷基卤化物或醇平行烷基化(福山方法)。取决于卤代烷或醇的性质,该步骤仍然不完全。然后使用反应性氟代烷基碘来捕获未反应的磺酰胺,从而实现快速有效的氟代固相萃取(FSPE)。将分离出的叔磺酰胺的一些实例平行地转化为具有良好纯度的相应仲胺。