A new and ancient solid-state reaction using K3Fe(CN)(6)/KOII to oxidize diaryl semicarbazides for preparing azo compounds has been reported. Nine N-aryl-2-phenyl-diazenecarboxamides have been synthesized in excellent...A new and ancient solid-state reaction using K3Fe(CN)(6)/KOII to oxidize diaryl semicarbazides for preparing azo compounds has been reported. Nine N-aryl-2-phenyl-diazenecarboxamides have been synthesized in excellent yields with simple instrument.展开更多
A Ru(II)-catalyzed ortho allylation reaction of N-aryl-7-azaindole with readily available 2-methylidene cyclic carbonate has been developed.This reaction is an effective pathway for synthesizing 7-azaindole derivative...A Ru(II)-catalyzed ortho allylation reaction of N-aryl-7-azaindole with readily available 2-methylidene cyclic carbonate has been developed.This reaction is an effective pathway for synthesizing 7-azaindole derivatives with a wide scope of substrates and high yields.In addition,the method can be extended to the allylation of other heterocyclic compounds and several cyclic carbonates,highlighting the practicality of this strategy for synthesis.展开更多
Fluoroboric acid adsorbed on silica-gel(HBF4·SiO2) has been found to be an extremely efficient and recyclable catalyst for the preparation of β-enaminones and β-enamino esters under solvent-free conditions.
In an attempt to search for potent fungicide,a series of novel N-ary 1-1H-pyrazole-5-carboxylate derivatives was designed and synthesized.Tlieir chemical structures were characterized by 1H NMR spectra and high reso・l...In an attempt to search for potent fungicide,a series of novel N-ary 1-1H-pyrazole-5-carboxylate derivatives was designed and synthesized.Tlieir chemical structures were characterized by 1H NMR spectra and high reso・lution mass spectrometry(HRMS).The preliminary bioassay results indicated that some target compounds displayed better fungicidal activities against certain fungi at 50μg/mL or favorable antitumor activities at 5 μg/mL compared with chlorothalonil and 5-fluorouracil,respectively.The structure-activity relationship demonstrated that the introduction of ester group and amide bond was favorable to the improvement of activities against Physalospora pin cola and Phytophthora capsici.展开更多
Vitamin B12 was applied as catalyst for the one-pot three-component synthesis of 3,4,5-trisubstituted furan-2(5H)-ones from the condensation between aldehydes, amines and dialkylacetylendicarboxylates at ambient tem...Vitamin B12 was applied as catalyst for the one-pot three-component synthesis of 3,4,5-trisubstituted furan-2(5H)-ones from the condensation between aldehydes, amines and dialkylacetylendicarboxylates at ambient temperature in Et OH. In addition, N-aryl-3-aminodihydropyrrol-2-one-4-carboxylates were synthesised using mentioned catalyst at ambient temperature in Et OH from condensation between formaldehyde, amines, and dialkylacetylenedicarboxylates. This methodology has number of advantages such as: use of green and nonhazardous catalyst, clean work up, short reaction times,high yields and no need to column chromatography.展开更多
A facile and highly efficient method has been developed for the synthesis of unsymmetrical N-aryl-2,2-di(1H-indol-3-yl)acetamide derivatives by regioselective Friedel-Crafts alkylation of the N-aryl-2-hydroxy-2-(1H...A facile and highly efficient method has been developed for the synthesis of unsymmetrical N-aryl-2,2-di(1H-indol-3-yl)acetamide derivatives by regioselective Friedel-Crafts alkylation of the N-aryl-2-hydroxy-2-(1H-indol-3-yl) acetamide derivatives with various indoles catalyzed by 2 mol/L H2SO4 at room temperature in ashort reaction time, the yield was up to 94%.展开更多
基金the financial support from the Natural Science Foundation of Technology Commission of Henan Province.
文摘A new and ancient solid-state reaction using K3Fe(CN)(6)/KOII to oxidize diaryl semicarbazides for preparing azo compounds has been reported. Nine N-aryl-2-phenyl-diazenecarboxamides have been synthesized in excellent yields with simple instrument.
基金supported by the Natural Science Foundation of Shandong Province(ZR2019BB011)the Scientific Research Foundation of Qingdao University of Science&Technology(010029022).
文摘A Ru(II)-catalyzed ortho allylation reaction of N-aryl-7-azaindole with readily available 2-methylidene cyclic carbonate has been developed.This reaction is an effective pathway for synthesizing 7-azaindole derivatives with a wide scope of substrates and high yields.In addition,the method can be extended to the allylation of other heterocyclic compounds and several cyclic carbonates,highlighting the practicality of this strategy for synthesis.
文摘Fluoroboric acid adsorbed on silica-gel(HBF4·SiO2) has been found to be an extremely efficient and recyclable catalyst for the preparation of β-enaminones and β-enamino esters under solvent-free conditions.
基金Supported by the Scientific Research Program of Tianjin Municipal Education Commission,China(No.2018KJ114).
文摘In an attempt to search for potent fungicide,a series of novel N-ary 1-1H-pyrazole-5-carboxylate derivatives was designed and synthesized.Tlieir chemical structures were characterized by 1H NMR spectra and high reso・lution mass spectrometry(HRMS).The preliminary bioassay results indicated that some target compounds displayed better fungicidal activities against certain fungi at 50μg/mL or favorable antitumor activities at 5 μg/mL compared with chlorothalonil and 5-fluorouracil,respectively.The structure-activity relationship demonstrated that the introduction of ester group and amide bond was favorable to the improvement of activities against Physalospora pin cola and Phytophthora capsici.
基金financial support from the Research Council of the University of Sistan and Baluchestan,Zahedan, Iran
文摘Vitamin B12 was applied as catalyst for the one-pot three-component synthesis of 3,4,5-trisubstituted furan-2(5H)-ones from the condensation between aldehydes, amines and dialkylacetylendicarboxylates at ambient temperature in Et OH. In addition, N-aryl-3-aminodihydropyrrol-2-one-4-carboxylates were synthesised using mentioned catalyst at ambient temperature in Et OH from condensation between formaldehyde, amines, and dialkylacetylenedicarboxylates. This methodology has number of advantages such as: use of green and nonhazardous catalyst, clean work up, short reaction times,high yields and no need to column chromatography.
文摘A facile and highly efficient method has been developed for the synthesis of unsymmetrical N-aryl-2,2-di(1H-indol-3-yl)acetamide derivatives by regioselective Friedel-Crafts alkylation of the N-aryl-2-hydroxy-2-(1H-indol-3-yl) acetamide derivatives with various indoles catalyzed by 2 mol/L H2SO4 at room temperature in ashort reaction time, the yield was up to 94%.