A series of 2 amino 3 cyano 4 aryl 4H benzochromenes were synehesized by the reaction of malononitrile and 1 naphthol with corresponding aromatic aldehydes in ethanol in the presence of piperidine as catalyst. The str...A series of 2 amino 3 cyano 4 aryl 4H benzochromenes were synehesized by the reaction of malononitrile and 1 naphthol with corresponding aromatic aldehydes in ethanol in the presence of piperidine as catalyst. The structures of all compounds obtained were characterized by elemental analysis, IR, 1H NMR and single crystal X ray diffractometry. X ray crystal structure analysis indicates compound 4b crystallizes in monoclinic, with space group C2/c, a = 2 422 1(6) nm , b = 0 901 6(2) nm , c = 1 700 3(5) nm , β =93 16(1)°, V = 3 707 4(15) nm 3 , Z =8, D c= 1 284 g/cm 3 , I≥2σ(I) =2 141, R = 0 043 2 , wR = 0 108 5 . Compared to other methods, this method has the advantages of simple operation and good yields.展开更多
A series of 2 amimo 3 cyano 7,7 dimethyl 4 aryl 5 oxo 5,6,7,8 tetra 4H chromenes were synthesized in the absence of catalyst. Their structures were determined by IR, 1H NMR, and single crystal X ray diffraction.
The heterocyclic compounds containing isothiazole were synthesized by reacting of 3,5-dichloro-4-cyano isothiazole with corres corresponding phenol.All the compoundes were characterized by elemental analysis? 1HNMR an...The heterocyclic compounds containing isothiazole were synthesized by reacting of 3,5-dichloro-4-cyano isothiazole with corres corresponding phenol.All the compoundes were characterized by elemental analysis? 1HNMR and IR spectrometry.The preliminary bioassay showed almost all of the compounds possessed selectivity herbicidal and better fungicidal activities.展开更多
文摘A series of 2 amino 3 cyano 4 aryl 4H benzochromenes were synehesized by the reaction of malononitrile and 1 naphthol with corresponding aromatic aldehydes in ethanol in the presence of piperidine as catalyst. The structures of all compounds obtained were characterized by elemental analysis, IR, 1H NMR and single crystal X ray diffractometry. X ray crystal structure analysis indicates compound 4b crystallizes in monoclinic, with space group C2/c, a = 2 422 1(6) nm , b = 0 901 6(2) nm , c = 1 700 3(5) nm , β =93 16(1)°, V = 3 707 4(15) nm 3 , Z =8, D c= 1 284 g/cm 3 , I≥2σ(I) =2 141, R = 0 043 2 , wR = 0 108 5 . Compared to other methods, this method has the advantages of simple operation and good yields.
文摘A series of 2 amimo 3 cyano 7,7 dimethyl 4 aryl 5 oxo 5,6,7,8 tetra 4H chromenes were synthesized in the absence of catalyst. Their structures were determined by IR, 1H NMR, and single crystal X ray diffraction.
文摘The heterocyclic compounds containing isothiazole were synthesized by reacting of 3,5-dichloro-4-cyano isothiazole with corres corresponding phenol.All the compoundes were characterized by elemental analysis? 1HNMR and IR spectrometry.The preliminary bioassay showed almost all of the compounds possessed selectivity herbicidal and better fungicidal activities.
