Enolizable Carbonyls and <i>N</i>
,<i>O</i>
-Acetals: A Rational Approach for Room-Temperature Lewis Superacid-Catalyzed Direct α-Amidoalkylation of Ketones and Aldehydes
作者:Bahria Touati、Abderrahman El Bouakher、Catherine Taillier、Raja Ben Othman、Malika Trabelsi-Ayadi、Sylvain Antoniotti、Elisabet Duñach、Vincent Dalla
DOI:10.1002/chem.201504772
日期:2016.4.18
carbonyl donors, that is, ketones and aldehydes with unbiased N,O‐acetals, is described. Sn(NTf2)4 is an optimal catalyst to promote this challenging transformation at low loading and the reaction shows promising scope. A comprehensive and rational evaluation of this reaction has led to the establishment of an empirical scale of nucleophilic reactivity for a broad set of ketones that should be helpful
描述了羰基供体的高效催化室温直接α-酰胺基烷基化反应,即具有无偏N,O-乙缩醛的酮和醛。Sn(NTf 2)4是在低负荷下促进这一具有挑战性的转变的最佳催化剂,该反应具有广阔的前景。对该反应进行了全面而合理的评估,已建立了一套广泛的酮亲核反应性的经验规模,这对羰基α-官能化方法的合成设计和开发应有所帮助。