Asymmetric cinnamylation of N-tert-butanesulfinyl imines with cinnamyl acetates: total syntheses of (+)-lycoricidine and (+)-7-deoxypancratistatin
作者:Sen-Lin Cai、Bin-Hua Yuan、Yi-Xiang Jiang、Guo-Qiang Lin、Xing-Wen Sun
DOI:10.1039/c7cc00108h
日期:——
A highly diastereoselective palladium catalyzed cinnamylation of N-tert-butanesulfinyl imines with cinnamyl acetates has been established to provide enantioenriched [small beta]-aryl homoallylic amines. The synthetic application of this stragety has been successfully...
Diastereoselective allylation and crotylation of <i>N-tert</i>-butanesulfinyl imines with allylic alcohols
作者:Olga Soares do Rego Barros、Juan Alberto Sirvent、Francisco Foubelo、Miguel Yus
DOI:10.1039/c4cc02317j
日期:——
The allylation and crotylation of N-tert-butanesulfinyl imines with allylic alcohols under palladium catalysis proceeded in a stereoselective fashion with anti-diastereoselectivity.
N-叔丁基磺酰亚胺与烯丙醇在钯催化下的烯丙基化和环丙基化以反-对映选择性的方式进行。
Metal-Mediated Reformatsky Reaction of Bromodifluoromethyl Ketone and Imine
作者:Chun-Ru Cao、Min Jiang、Jin-Tao Liu
DOI:10.1002/ejoc.201403424
日期:2015.2
The Reformatsky reaction of bromodifluoromethyl ketones and imines took place readily in the presence of Zn/CuCl at room temperature to afford β-amino α,α-difluoro ketones in good yields. Using (S)-tert-butanesulfinyl as a chiral auxiliary, the asymmetric Reformatsky reaction was also achieved and found to proceed with excellent diastereoselectivities. A plausible model is proposed to account for the
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.