Terephthalaldehyde reacts with sarcosine to form azomethine ylide, which adds to C60 according to a[3+2] cycloaddition process to form fullerene pyrrolidine. The same addition reaction can also be applied to other sub...Terephthalaldehyde reacts with sarcosine to form azomethine ylide, which adds to C60 according to a[3+2] cycloaddition process to form fullerene pyrrolidine. The same addition reaction can also be applied to other substituted benzaldehyde with para-H, NO2, OMe, NMe2 groups.展开更多
Layered double hydroxides(LDHs)pillared with heteropolyoxometalate have been synthesized via both restructuring of hydrotalcite-like compounds and direct anion exchange under microwave field.LDHs and their derivatives...Layered double hydroxides(LDHs)pillared with heteropolyoxometalate have been synthesized via both restructuring of hydrotalcite-like compounds and direct anion exchange under microwave field.LDHs and their derivatives are both found to be efficient for alkylation of isobutane with butene with a higher butene conversion and selectivity towards Cso展开更多
A new rearranged abietane diterpenoid, incanone was isolated from the whole plant of Caryopteris incana (Thunb.) Miq. On the basis of HRMS, EIMS, (1)HNMR, (13)CNMR, DEPT, H-1-H-1 COSY, HMQC, HMBC and NOESY, incanone w...A new rearranged abietane diterpenoid, incanone was isolated from the whole plant of Caryopteris incana (Thunb.) Miq. On the basis of HRMS, EIMS, (1)HNMR, (13)CNMR, DEPT, H-1-H-1 COSY, HMQC, HMBC and NOESY, incanone was determined as 11,12,14,16-tetrahydroxyl-17 (15-16) abeo-abieta-8,11,13-triene-7-one.展开更多
The catalytic oxidation of cyclohexene to cyclohexanone using Pd(OAc)(2)/HQ/FePc was investigated in an acidic aqueous solution of acetonitrile. The role of each component of this system in the oxidation of cyclohexen...The catalytic oxidation of cyclohexene to cyclohexanone using Pd(OAc)(2)/HQ/FePc was investigated in an acidic aqueous solution of acetonitrile. The role of each component of this system in the oxidation of cyclohexene was explored by means of UV-VIS, IR, XPS spectroscopy and. cyclic voltammetry, respectively. Based on the experimental results, the mechanism of the oxidation of cyclohexene catalyzed by Pd(OAc)(2)/HQ/FePc was elucidated.展开更多
Superconductor mixed oxides were often used as catalysts at higher temperature in gas phase oxidations, and considered not suitable for lower temperature reactions in the liquid-solid phase; here the catalysis of YBa2...Superconductor mixed oxides were often used as catalysts at higher temperature in gas phase oxidations, and considered not suitable for lower temperature reactions in the liquid-solid phase; here the catalysis of YBa2Cu3O7+/-x and Y2BaCuO5+/-x in the phenol hydroxylation at lower temperature with H2O2 as oxygen donor was studied, and found that the superconductor YBa2Cu3O7+/-x, has no catalytic activity for phenol hydroxylation, but Y2BaCuO5+/-x does, even has better catalytic activity and stability than most previously reported ones. With the studies of catalysis of other simple metal oxides and perovskite-like mixed oxides, a radical substitution mechanism is proposed and the experimental facts are explained clearly, and draw a conclusion that the perovskite-like mixed oxides with (AO)(ABO(3)) and (AO)2(ABO(3)) structure have better catalytic activity than the simple perovskite oxides with (ABO(3))(3) structure alone, and (AO) structure unit is the key for the mixed oxides to have the phenol hydroxylation activity. No pollution of this process is very important for its further industrial application.展开更多
文摘Terephthalaldehyde reacts with sarcosine to form azomethine ylide, which adds to C60 according to a[3+2] cycloaddition process to form fullerene pyrrolidine. The same addition reaction can also be applied to other substituted benzaldehyde with para-H, NO2, OMe, NMe2 groups.
文摘Layered double hydroxides(LDHs)pillared with heteropolyoxometalate have been synthesized via both restructuring of hydrotalcite-like compounds and direct anion exchange under microwave field.LDHs and their derivatives are both found to be efficient for alkylation of isobutane with butene with a higher butene conversion and selectivity towards Cso
文摘A new rearranged abietane diterpenoid, incanone was isolated from the whole plant of Caryopteris incana (Thunb.) Miq. On the basis of HRMS, EIMS, (1)HNMR, (13)CNMR, DEPT, H-1-H-1 COSY, HMQC, HMBC and NOESY, incanone was determined as 11,12,14,16-tetrahydroxyl-17 (15-16) abeo-abieta-8,11,13-triene-7-one.
文摘The catalytic oxidation of cyclohexene to cyclohexanone using Pd(OAc)(2)/HQ/FePc was investigated in an acidic aqueous solution of acetonitrile. The role of each component of this system in the oxidation of cyclohexene was explored by means of UV-VIS, IR, XPS spectroscopy and. cyclic voltammetry, respectively. Based on the experimental results, the mechanism of the oxidation of cyclohexene catalyzed by Pd(OAc)(2)/HQ/FePc was elucidated.
文摘Superconductor mixed oxides were often used as catalysts at higher temperature in gas phase oxidations, and considered not suitable for lower temperature reactions in the liquid-solid phase; here the catalysis of YBa2Cu3O7+/-x and Y2BaCuO5+/-x in the phenol hydroxylation at lower temperature with H2O2 as oxygen donor was studied, and found that the superconductor YBa2Cu3O7+/-x, has no catalytic activity for phenol hydroxylation, but Y2BaCuO5+/-x does, even has better catalytic activity and stability than most previously reported ones. With the studies of catalysis of other simple metal oxides and perovskite-like mixed oxides, a radical substitution mechanism is proposed and the experimental facts are explained clearly, and draw a conclusion that the perovskite-like mixed oxides with (AO)(ABO(3)) and (AO)2(ABO(3)) structure have better catalytic activity than the simple perovskite oxides with (ABO(3))(3) structure alone, and (AO) structure unit is the key for the mixed oxides to have the phenol hydroxylation activity. No pollution of this process is very important for its further industrial application.
