The copper(II)-catalyzed (4+1) cyclizations and copper(I)-catalyzed (3+2) cycloadditions of iodonium ylides and alkynes were successfully developed by employing efficient and safe iodonium ylides instead of traditional diazo compounds. Highly functionalized dimethyl (E)-3-benzylideneindoline-2,2-dicarboxylates and methyl 5-(2-hydroxyphenyl)-2-methoxy-4-phenylfuran-3-carboxylates were conveniently prepared
A Synthetic Route to Chiral Benzo-Fused N-Heterocycles via Sequential Intramolecular Hydroamination and Asymmetric Hydrogenation of Anilino-Alkynes
作者:Cong Xu、Yu Feng、Faju Li、Jiahong Han、Yan-Mei He、Qing-Hua Fan
DOI:10.1021/acs.organomet.9b00183
日期:2019.10.28
derivatives, were obtained from anilino-alkynes in high yields (up to 98%) with moderate to excellent enantioselectivities (up to 98% ee) under mild conditions. This protocol features good functional group tolerance and highatomeconomy. Furthermore, this catalytic protocol is applicable to gram-scale synthesis of a naturally occurring alkaloid, (−)-Angustureine.
已经报道了在单一手性钌配合物或由非手性金配合物和手性钌配合物组成的二元体系的催化下有效的顺序分子内加氢/不对称氢化反应。从苯胺衍生物获得了多种对映体富集的苯并稠合的N-杂环,包括1,2,3,4-四氢喹啉,二氢吲哚和2,3,4,5-四氢-1 H-苯并[ b ] pine庚因衍生物-炔烃在温和条件下具有高产率(高达98%)和中等至优异的对映选择性(高达98%ee)。该协议具有良好的官能团耐受性和较高的原子经济性。此外,该催化方案适用于天然存在的生物碱(-)-Angustureine的克规模合成。
Highly Enantioselective Relay Catalysis in the Three-Component Reaction for Direct Construction of Structurally Complex Heterocycles
作者:Chao Wang、Zhi-Yong Han、Hong-Wen Luo、Liu-Zhu Gong
DOI:10.1021/ol1006086
日期:2010.5.21
A highly enantioselective three-component cascadereaction, consisting of an enantioselective [4+2] cycloaddition reactioncatalyzed by chiral phosphoric acid and a subsequent catalytic intramolecular hydroamination by gold(I) complex, provides a unique method to access structurally diverse julolidine derivatives in high optical purity.
When Phosphosugars Meet Gold: Synthesis and Catalytic Activities of Phostones and Polyhydroxylated Phosphonite Au(I) Complexes
作者:Gaëlle Malik、Angélique Ferry、Xavier Guinchard
DOI:10.3390/molecules201219755
日期:——
The synthesis and characterization of P-chiral phosphonite-, phosphonate- and thiophosphonate-Au(I) complexes are reported. These novel ligands for Au(I) are based on glycomimetic phosphorus scaffolds, obtained from the chiral pool. The catalytic activities of these complexes are shown in the cyclization of allenols and the hydroamination of 2-(2-propynyl)aniline combined with an organocatalyzed reduction
Chiral Gold Phosphate Catalyzed Tandem Hydroamination/Asymmetric Transfer Hydrogenation Enables Access to Chiral Tetrahydroquinolines
作者:Yu-Liu Du、Yue Hu、Yi-Fan Zhu、Xi-Feng Tu、Zhi-Yong Han、Liu-Zhu Gong
DOI:10.1021/acs.joc.5b00153
日期:2015.5.1
A highly efficient chiral gold phosphate-catalyzed tandem hydroamination/asymmetric transfer hydrogenation reaction is described. A series of chiral tetrahydroquinolines were obtained in excellent yields and enantioselectivities. In this reaction, the gold catalyst enables both the hydroamination step as a pi-Lewis acid and the asymmetric hydrogen-transfer process as an effective chiral Lewis acid.