In this paper,a series of optically active MeO-BIPHEP-type ligands,（S）-6,6′-dimethoxy-2,2’-bis（di-p-alkoxyphenylphosphine）- 1,1′-biphenyl were synthesized and used to prepare the ruthenium complex.The effects o...In this paper,a series of optically active MeO-BIPHEP-type ligands,（S）-6,6′-dimethoxy-2,2’-bis（di-p-alkoxyphenylphosphine）- 1,1′-biphenyl were synthesized and used to prepare the ruthenium complex.The effects of para-substituted were observed,the results showed that the ruthenium catalysts[diphosphine RuCl;diamine]containing both t-Bu and i-Pr substitutions have better activities and enantioselectivities than the non-substituted ruthenium catalysts in the asymmetric hydrogenation of acetophenone.展开更多
Tetra-Schiff base macrocyclic compound containing benzo-12-crown-4 was synthesized via condensation of 2, 6-diformyl-4-methyl-phenol with 4, 5- diaminobenzo-12C- 4 promoted by proton. The compound was characterized b...Tetra-Schiff base macrocyclic compound containing benzo-12-crown-4 was synthesized via condensation of 2, 6-diformyl-4-methyl-phenol with 4, 5- diaminobenzo-12C- 4 promoted by proton. The compound was characterized by MS, IR 1HNMR spectroscopy and elemental analysis.展开更多
The catalytic performances of four HRh(CO)(PPh3)3-diphosphine (BISBI,BDPX, BDNA and BINAP) systems in 1-dodecene hydroformylation were investigated and compared with HRh(CO)(PPh3)3-PPh3 system. The catalyst system HR...The catalytic performances of four HRh(CO)(PPh3)3-diphosphine (BISBI,BDPX, BDNA and BINAP) systems in 1-dodecene hydroformylation were investigated and compared with HRh(CO)(PPh3)3-PPh3 system. The catalyst system HRh(CO)(PPh3)3-BISBI exhibited very high regioselectivity for the formation of linear aldehyde.展开更多
A new preparation and reduction method of ?Al2O3 supported and PVP stabilized platinum nanoclusters was studied. The catalyst exhibited very high activity and selectivity for acetophenone hydrogenation in isopropanol...A new preparation and reduction method of ?Al2O3 supported and PVP stabilized platinum nanoclusters was studied. The catalyst exhibited very high activity and selectivity for acetophenone hydrogenation in isopropanol-KOH solution at 25~60C and P H2=1~5 MPa.展开更多
Chiral N,N＇-dialkylated cyclohexanediamine derived ligands have been synthesized and used in the asymmetric hydrogenation of aryl ketones.Optically active alcohols with up to 90%enantiomeric excess were obtained in h...Chiral N,N＇-dialkylated cyclohexanediamine derived ligands have been synthesized and used in the asymmetric hydrogenation of aryl ketones.Optically active alcohols with up to 90%enantiomeric excess were obtained in high yields.展开更多
基金the NSFC(No.20272037),the Doctor's Foundation of Education Ministry of China(No.20030610022)Foundation of Xihua University(No.R0723315) and(No.07ZA109) for the financial support of this work.
文摘In this paper,a series of optically active MeO-BIPHEP-type ligands,（S）-6,6′-dimethoxy-2,2’-bis（di-p-alkoxyphenylphosphine）- 1,1′-biphenyl were synthesized and used to prepare the ruthenium complex.The effects of para-substituted were observed,the results showed that the ruthenium catalysts[diphosphine RuCl;diamine]containing both t-Bu and i-Pr substitutions have better activities and enantioselectivities than the non-substituted ruthenium catalysts in the asymmetric hydrogenation of acetophenone.
文摘Tetra-Schiff base macrocyclic compound containing benzo-12-crown-4 was synthesized via condensation of 2, 6-diformyl-4-methyl-phenol with 4, 5- diaminobenzo-12C- 4 promoted by proton. The compound was characterized by MS, IR 1HNMR spectroscopy and elemental analysis.
基金We thank the National Basic Research Project of China(G2000048008)for the financial support.
文摘The catalytic performances of four HRh(CO)(PPh3)3-diphosphine (BISBI,BDPX, BDNA and BINAP) systems in 1-dodecene hydroformylation were investigated and compared with HRh(CO)(PPh3)3-PPh3 system. The catalyst system HRh(CO)(PPh3)3-BISBI exhibited very high regioselectivity for the formation of linear aldehyde.
文摘A new preparation and reduction method of ?Al2O3 supported and PVP stabilized platinum nanoclusters was studied. The catalyst exhibited very high activity and selectivity for acetophenone hydrogenation in isopropanol-KOH solution at 25~60C and P H2=1~5 MPa.
基金the NSFC(No.20272037)the NSF of Sichuan(No.07ZA109)the foundation of Xihua University(No. R0723315) and(No.XZD0912-09) for the financial support of this work
文摘Chiral N,N＇-dialkylated cyclohexanediamine derived ligands have been synthesized and used in the asymmetric hydrogenation of aryl ketones.Optically active alcohols with up to 90%enantiomeric excess were obtained in high yields.
