Expedient Access to Unsymmetrical Diarylindolylmethanes through Palladium-Catalyzed Domino Electrophilic Cyclization–Extended Conjugate Addition Approach
作者:Virsinha Reddy、Ramasamy Vijaya Anand
DOI:10.1021/acs.orglett.5b01030
日期:2015.7.17
A palladium-catalyzed domino process to access unsymmetrical diarylindolylmethanes has been developed through the annulation of o-alkynylanilines followed by 1,6-coojugate addition with p-quinone methides (p-QMs) under relatively mild conditions. The broad substrate scope of this methodology was demonstrated through the use of a wide range of substituted o-alkynylanilines and p-quinone methides, and in most cases, the unsymmetrical diarylindolylmethaties could be prepared in moderate to excellent yields. Notably, this method does not require any amino group protection. Moreover, 100% atom economy makes this transformation attractive from a green chemistry perspective.
Vasilevsky S. F., Tretyakov E. V., Verkruijsse H. D., Synth. Commun, 24 (1994) N 12, S 1733-1736
作者:Vasilevsky S. F., Tretyakov E. V., Verkruijsse H. D.