Combined InCl<sub>3</sub>- and Amine-Catalyzed Intramolecular Addition of α-Disubstituted Aldehydes onto Unactivated Alkynes
作者:Benjamin Montaignac、Maxime R. Vitale、Veronique Michelet、Virginie Ratovelomanana-Vidal
DOI:10.1021/ol100729t
日期:2010.6.4
The combination of enamine-type catalysis to the indium-catalyzed activation of alkynes allows the efficient preparation of functionalized cyclopentanes bearing a quaternary stereogenic center. A broad range of formylalkynyl derivatives has been prepared. The InCl3/(Cy)(i-Pr)NH system efficiently promotes the carbocyclization reaction of alpha-disubstituted aldehydes in good to excellent yields.