Stereodivergent Synthesis of N‐Heterocycles by Catalyst‐Controlled, Activity‐Directed Tandem Annulation of Diazo Compounds with Amino Alkynes
作者:Kai Liu、Chenghao Zhu、Junxiang Min、Shiyong Peng、Guangyang Xu、Jiangtao Sun
DOI:10.1002/anie.201507122
日期:2015.10.26
A stereodivergent synthesis of five‐membered N‐heterocycles, such as 2,3‐dihydropyrroles, and 2‐methylene and 3‐methylene pyrrolidines, has been developed through a tandem annulation of amino alkynes with diazo compounds and involves the trapping of in situ formed intermediates. Mechanistic investigations indicate that the copper‐catalyzed tandem annulations proceed by allenoate formation and subsequent
Gold-catalyzed intermolecular oxidation of chiral homopropargyl sulfonamides: a reliable access to enantioenriched pyrrolidin-3-ones
作者:Chao Shu、Long Li、Yong-Fei Yu、Shuang Jiang、Long-Wu Ye
DOI:10.1039/c3cc49238a
日期:——
A gold-catalyzed intermolecular oxidation of chiralhomopropargylsulfonamides has been developed, which provides a reliable access to synthetically useful chiral pyrrolidin-3-ones with excellent ee, by combining the chiral tert-butylsulfinimine chemistry and gold catalysis. This methodology has also been used in the facile synthesis of natural product (-)-irniine. The use of readily available starting
Gold-Catalyzed Tandem Cycloisomerization-Halogenation of Chiral Homopropargyl Sulfonamides
作者:Chao Shu、Long Li、Cang-Hai Shen、Peng-Peng Ruan、Chao-Yue Liu、Long-Wu Ye
DOI:10.1002/chem.201503891
日期:2016.2.12
Two new gold‐catalyzed tandem cycloisomerization–halogenation reactions of chiralhomopropargylsulfonamides have been developed. Various enantioenriched 3,3‐diiodopyrrolidin‐2‐ols and 3‐fluoropyrrolidin‐2‐ols were obtained in moderate‐to‐good yields with excellent enantio‐ and diastereoselectivity.
Gold-Catalyzed Oxidative Cyclization of Chiral Homopropargyl Amides: Synthesis of Enantioenriched γ-Lactams
作者:Chao Shu、Meng-Qi Liu、Shan-Shan Wang、Long Li、Long-Wu Ye
DOI:10.1021/jo400127x
日期:2013.4.5
A gold-catalyzedtandemcycloisomerization/oxidation of homopropargyl amides has been developed, which provides ready access to synthetically useful chiral γ-lactams with excellent ee by combining the chiral tert-butylsulfinimine chemistry and gold catalysis. The utility of this methodology has also been demonstrated in the synthesis of biologically active compound S-MPP and natural product (−)-bgugaine
Stereoselective synthesis of 2,5-disubstituted pyrrolidines <i>via</i> gold-catalysed anti-Markovnikov hydroamination-initiated tandem reactions
作者:Tong-De Tan、Yang-Bo Chen、Ming-Yang Yang、Jia-Le Wang、Hao-Ze Su、Feng-Lin Hong、Jin-Mei Zhou、Long-Wu Ye
DOI:10.1039/c9cc05295j
日期:——
A series of gold-catalysed intramolecular anti-Markovnikov hydroamination-initiated azidation, allylation and heteroarylation reactions of chiral homopropargyl sulfonamides have been developed. Various enantioenriched 2,5-disubstituted pyrrolidines are obtained in moderate to excellent yields with excellent enantioselectivities and generally high diastereoselectivities.