The promoting effect of ethanol on the synthesis of N-（2-methylphenyl）hydroxylamine from o-nitrotoluene in Zn/H2O/CO2 system was observed.By adding appropriate amount of ethanol,the selectivity of N-（2-methylphenyl...The promoting effect of ethanol on the synthesis of N-（2-methylphenyl）hydroxylamine from o-nitrotoluene in Zn/H2O/CO2 system was observed.By adding appropriate amount of ethanol,the selectivity of N-（2-methylphenyl）hydroxylamine increased from 71%to 90%when the reduction was carried out at 25℃under normal pressure of CO2.展开更多
Selective oxidation of o-nitrotoluene to onitrobenzaldehyde with metalloporphyrins as biomimetic catalysts was studied.The peripheral substituent around porphyrin rings and various process parameters of NaOH concentra...Selective oxidation of o-nitrotoluene to onitrobenzaldehyde with metalloporphyrins as biomimetic catalysts was studied.The peripheral substituent around porphyrin rings and various process parameters of NaOH concentration,reaction temperature,reaction time and oxygen pressure all affect the selectivity of onitrobenzaldehyde.Further,82.0%selectivity of onitrobenzaldehyde was achieved under the optimum conditions:1.0×10^(-5)mol·L^(-1)of T(p-NO_(2))PPFeCl catalyst,2.5 mol·L^(-1)of NaOH,0.2 mol·L^(-1)of o-nitrotoluene,45℃and 2.0 MPa for 6 h.展开更多
基金supported by the Doctoral Fund of Ministry of Education of China(No.20070141046)the Fund of Education Department of Liaoning Province(No.[2006]124)
文摘The promoting effect of ethanol on the synthesis of N-（2-methylphenyl）hydroxylamine from o-nitrotoluene in Zn/H2O/CO2 system was observed.By adding appropriate amount of ethanol,the selectivity of N-（2-methylphenyl）hydroxylamine increased from 71%to 90%when the reduction was carried out at 25℃under normal pressure of CO2.
基金supported by the Key Project of the Natural Science Foundation of Beijing(No.2061001)the National Natural Science Foundation of China(Grant Nos.20576005,20776003).
文摘Selective oxidation of o-nitrotoluene to onitrobenzaldehyde with metalloporphyrins as biomimetic catalysts was studied.The peripheral substituent around porphyrin rings and various process parameters of NaOH concentration,reaction temperature,reaction time and oxygen pressure all affect the selectivity of onitrobenzaldehyde.Further,82.0%selectivity of onitrobenzaldehyde was achieved under the optimum conditions:1.0×10^(-5)mol·L^(-1)of T(p-NO_(2))PPFeCl catalyst,2.5 mol·L^(-1)of NaOH,0.2 mol·L^(-1)of o-nitrotoluene,45℃and 2.0 MPa for 6 h.
