A Brønsted acid catalyzed C3-selective tert-alkylation of indoles using tertiary propargylic and benzylic alcohols has been developed. New C3-propargylated indole derivatives with a quaternary carbon at the propargylic position have been efficiently synthesized. Reactions were performed in air with undried solvents, and water was the only side product of the process.
Lewis Base-Catalyzed Additions of Alkynes Using Trialkoxysilylalkynes
作者:Robert B. Lettan、Karl A. Scheidt
DOI:10.1021/ol051030f
日期:2005.7.1
[reaction: see text]. The Lewis base-catalyzedadditions of alkynyl nucleophiles to aldehydes, ketones, and imines is described. Mechanistic studies strongly indicate that the use of new triethoxysilylalkynes facilitates access of a reactive hypervalent silicate intermediate. This activated carbon nucleophile subsequently undergoes rapid addition to carbonyl compounds and imines, thus affording the
Brønsted Acid Catalyzed Alkylation of Indoles with Tertiary Propargylic Alcohols: Scope and Limitations
作者:Roberto Sanz、Delia Miguel、Alberto Martínez、Mukut Gohain、Patricia García-García、Manuel A. Fernández-Rodríguez、Estela Álvarez、Félix Rodríguez
DOI:10.1002/ejoc.201001055
日期:2010.12
Junta de Castilla y Leon (BU021A09 and GR-172) and the Ministerio de Educacion y Ciencia (MEC) and FEDER (CTQ2007-61436/BQU and CTQ2009-09949/BQU) for financial support. D. M. and A. M. thank the MEC for MEC-FPU predoctoral fellowships. M. G. thanks the MEC for a "Young Foreign Researchers" contract (SB2006-0215). M. A. F.-R. and P. G.-G. also thank the MEC for "Ramon y Cajal" and "Juan de la Cierva"
Junta de Castilla y Leon (BU021A09 和 GR-172) 以及教育部长 (MEC) 和 FEDER (CTQ2007-61436/BQU 和 CTQ2009-09949/BQU) 提供财政支持。DM 和 AM 感谢 MEC 提供 MEC-FPU 博士前奖学金。MG 感谢 MEC 的“外国青年研究人员”合同 (SB2006-0215)。MAF-R。和PG-G。还要感谢 MEC 的“Ramon y Cajal”和“Juan de la Cierva”合同。