Gold-Catalyzed Tandem Cycloisomerization and Dimerization of Chiral Homopropargyl Sulfonamides
作者:Yong-Fei Yu、Chao Shu、Cang-Hai Shen、Tian-Yi Li、Long-Wu Ye
DOI:10.1002/asia.201301058
日期:2013.12
A reaction built for two: A novel gold‐catalyzed tandemcycloisomerization/dimerization of chiralhomopropargylsulfonamides has been developed. The reaction provides ready access to functionalized pyrrolidines in mostly good to excellent yields. Notably, excellent diastereoselectivities (>50:1) were also achieved in all cases.
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
Efficient and practical synthesis of enantioenriched 2,3-dihydropyrroles through gold-catalyzed anti-Markovnikov hydroamination of chiral homopropargyl sulfonamides
作者:Yong-Fei Yu、Chao Shu、Bo Zhou、Jian-Qiao Li、Jin-Mei Zhou、Long-Wu Ye
DOI:10.1039/c4cc09245g
日期:——
A direct gold-catalyzed 5-endo-dig cycloisomerization of chiralhomopropargylsulfonamides has been developed. A range of enantioenriched 2,3-dihydropyrroles are readily accessed by utilizing this approach. Importantly, this gold-catalyzedcycloisomerization reaction proceeds through an anti-Markovnikov addition by using a catalytic base as the additive, which completely suppresses the undesired dimerization
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.
Synthesis of Enantioenriched Pyrrolidines via Gold-Catalyzed Tandem Cycloisomerization/Hydrogenation of Chiral Homopropargyl Sulfonamides
作者:Yong-Fei Yu、Chao Shu、Tong-De Tan、Long Li、Shahid Rafique、Long-Wu Ye
DOI:10.1021/acs.orglett.6b02736
日期:2016.10.7
novel gold-catalyzedtandemcycloisomerization/hydrogenation of chiralhomopropargylsulfonamides has been developed. Various enantioenriched pyrrolidines can be obtained in excellent yields and excellent enantioselectivities by combination of chiral tert-butylsulfinimine chemistry with gold catalysis. Importantly, this represents the first example of a pyrrolidine synthesis from homopropargyl sulfonamide