Gold-Catalyzed Deoxygenated Cyclization of <i>cis</i>-2,4-Dien-1-als with Regioselective Addition of Two Nucleophiles. One-Pot Synthesis of Highly Functionalized Cyclopentene Framework
作者:Chung-Chang Lin、Tse-Min Teng、Arjan Odedra、Rai-Shung Liu
DOI:10.1021/ja069171f
日期:2007.4.1
We report a new gold-catalyzed deoxygenated cyclization of cis-2,4-dien-1-als with external nucleophiles at ambient temperatures, which leads to a 1,4-double nucleophilic addition to the newly formed cyclopentene ring. The use of this cyclization is reflected not only by its compatibility with a wide scope of nucleophiles, but also by a facile construction of complex frameworks in diversified approaches
Gold-Catalyzed Deoxygenative Nazarov Cyclization of 2,4-Dien-1-als for Stereoselective Synthesis of Highly Substituted Cyclopentenes
作者:Chung-Chang Lin、Tse-Min Teng、Chung-Chih Tsai、Hsin-Yi Liao、Rai-Shung Liu
DOI:10.1021/ja806415t
日期:2008.12.3
annulation products reveals evidence for the participation of Nazarov cyclization. This deoxygenative cyclization is extensible to a tandemintramolecularcyclization/nucleophilic addition cascade, giving polycyclic carbo- or oxacyclic compounds with controlled stereochemistry. This new gold catalysis is applied to a short synthesis of natural compounds of the brazilane family, including brazilane, O-trimethyl-