Lewis Acid Promoted Oxonium Ion Driven Carboamination of Alkynes for the Synthesis of 4-Alkoxy Quinolines
作者:Santosh J. Gharpure、Santosh K. Nanda、Priyanka A. Adate、Yogesh G. Shelke
DOI:10.1021/acs.joc.6b02896
日期:2017.2.17
Lewis acid mediated multisegment coupling cascade is designed for the synthesis of densely substituted 4-alkoxy quinolines via an oxonium ion triggered alkyne carboamination sequence involving C–C and C–N bond formations. Cyclic ether fused-quinolines could also be accessed using this fast, operationally simple, high yielding, chemoselective and functional group tolerant method. Versatility and utility
Ethylene Transposition: Ruthenium Hydride Catalyzed Intramolecular <i>trans</i>-Silylvinylation of Internal Alkynes
作者:Shasha Liu、Jinbo Zhao、Lauren Kaminsky、Robert J. Wilson、Nadia Marino、Daniel A. Clark
DOI:10.1021/ol5020027
日期:2014.9.5
A highly selective intramolecular trans-silylvinylation of internal alkynes catalyzed by RuHCl(CO)(SIMes)(PPh3) has been accomplished. The use of methyl vinyl ketone as an additive increased the efficiency of this transformation. This process was used to successfully form five-, six-, and seven-membered oxasilacycles by a formal anti-exo-dig cyclization.