期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
Asymmetric catalytic hydrogenation of imines and enamines in natural product synthesis
1
作者 Pei Tang Huijing Wang +1 位作者 Wen Zhang Fen-Er Chen 《Green Synthesis and Catalysis》 2020年第1期26-41,共16页
Asymmetric catalytic hydrogenations of imines and enamines with chiral transition-metal complexes bearing chiral ligands are among the most green and powerful approaches for the elaboration of chiral amine structures ... Asymmetric catalytic hydrogenations of imines and enamines with chiral transition-metal complexes bearing chiral ligands are among the most green and powerful approaches for the elaboration of chiral amine structures in organic synthesis.This review focuses on recent applications of asymmetric hydrogenations of imine and enamine substrates in the total syntheses of natural products.These applications include diverse processes involving asymmetric transfer hydrogenation(ATH)and asymmetric hydrogenation(AH)to form key chiral amine motifs in natural products with good efficiency and high-level enantiocontrol. 展开更多
关键词 asymmetric catalytic hydrogenation Imine substrates Enamine substrates Natural product synthesis Enantioselectivity
原文传递
Synthesis of New Ligand 1,2-Bis{di[(R,R)-1,3,2-oxzaphosphlidine]phosphino}ethane with C_2-symmetric Axis and Application in Rh-catalyzed Asymmetric Hydrogenation
2
作者 GONG Da-chun ZHOU Hua +1 位作者 WEI Ping OUYANG Ping-kai 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2007年第5期544-548,共5页
New ligand 1,2-bis{di[(R,R)-1,3,2-oxzaphosphlidine]phosphino}ethane [(R,R)-BDOPPEs 1,2,3 and 4] with C2-symmetric axis and bearing nitrogen and oxygen were synthesized from readily available optically active amino... New ligand 1,2-bis{di[(R,R)-1,3,2-oxzaphosphlidine]phosphino}ethane [(R,R)-BDOPPEs 1,2,3 and 4] with C2-symmetric axis and bearing nitrogen and oxygen were synthesized from readily available optically active amino alcohols.Rh complexes with these ligands were highly enantioselective catalysts for asymmetric hydrogenation of N-benzoyldehydroamino acid derivatives and α-functionalized ketones in 99%e.e.and 98%e.e.,respectively.This new class of(R,R)-BDOPPEs 1,2,3 and 4 gave much more effectivity and enantionselectivity than their corresponding non-C2-asymmetric aminophosphine phosphinite. 展开更多
关键词 (R R) -BDOPPE C2-Symmetry asymmetric catalytic hydrogenation
下载PDF
New Chiral Ligand N-Toluenesulfonyl-2,2′-dimethoxy-6,6′-diaminobiphenyl for Catalytic Asymmetric Transfer Hydrogenation of Ketones
3
作者 陈亿新 李月明 +1 位作者 林剑虹 陈新滋 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2002年第6期606-609,共4页
A new chiral ligand N p toluenesulfonyl 2,2′ dimethoxy 6,6′ diaminobiphenyl (Ts DMBDPPA) was prepared from 2,2′ dimethoxy 6,6′ diaminobiphenyl via N tosylation. Its Ru(II) complex was effec... A new chiral ligand N p toluenesulfonyl 2,2′ dimethoxy 6,6′ diaminobiphenyl (Ts DMBDPPA) was prepared from 2,2′ dimethoxy 6,6′ diaminobiphenyl via N tosylation. Its Ru(II) complex was effective catalysts for catalytic asymmetric transfer hydrogenation of aromatic ketones (with ee 's up to 69.3%). 展开更多
关键词 N p toluenesulfonyl 2 2′ dimethoxy 6 6′ diaminobiphenyl chiral ligand catalytic asymmetric transfer hydrogenation
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部