Michael Additions in Aqueous Media: “On-Water” and “In-Water” Processes from α-Nitro Ketones and Their Anions
作者:Giorgio Giorgi、Pilar López-Alvarado、Sonia Miranda、Jean Rodriguez、J. Carlos Menéndez
DOI:10.1002/ejoc.201201431
日期:2013.3
A variety of α,β-unsaturated aldehydes and ketones gave very high-yielding Michael addition reactions with α-nitrocycloalkanones in water, at room temperature without added catalyst. These can be considered as one of the very few “on-water” Michael reactions known in the literature, because they took place in suspension or emulsion and at increased speed relative to the same transformations performed
多种 α,β-不饱和醛和酮在室温下与水中的 α-硝基环烷酮进行高产率迈克尔加成反应,无需添加催化剂。这些可以被认为是文献中已知的极少数“水上”迈克尔反应之一,因为它们发生在悬浮液或乳液中,并且相对于在有机溶剂中进行的相同转化速度更快。使用非常稀的碳酸钾水溶液作为反应介质的相关方案将该方法的范围扩展到环烯酮和不饱和酯、腈和砜,并且很可能发生在大部分水相中,即“在水里”。这两种制备方法都是对环境友好且有效的先前已知程序的替代方法。