Nitrophenyl ferulate was synthesized in one step without the protection of the hydroxyl of ferulic acid in the presence of 1,3 dicyclohexylcarbodiimide(DCC) as the catalyst. Thus, 15 20 g of ferulic acid reacted with ...Nitrophenyl ferulate was synthesized in one step without the protection of the hydroxyl of ferulic acid in the presence of 1,3 dicyclohexylcarbodiimide(DCC) as the catalyst. Thus, 15 20 g of ferulic acid reacted with 18 07 g of 4 nitrophenol for 24 h at room temperature in the presence of 22 44 g of DCC. The crude product was recrystallized from CHCl 3 to give 16 00 g of 4 nitrophenyl ferulate and the yield was 82 5%. Elemental analysis, IR and 1H NMR techniques were used to prove the structure of the product.展开更多
The title compound N,N′ ditosyl 3 methoxyimino 1,5 diaza cyclooctane(4) has been prepared by two methods,the reactions of all steps are carried out under very moderate conditions and the overall yield is high.The str...The title compound N,N′ ditosyl 3 methoxyimino 1,5 diaza cyclooctane(4) has been prepared by two methods,the reactions of all steps are carried out under very moderate conditions and the overall yield is high.The structures of the new compounds 2,3,4 are characterized by elemental analysis,IR, 1H NMR and MS spectroscopy.展开更多
2-Thioxo-3-alkyl-5-phenylmethylidene-4-imidazolidinones 5 were synthesized via tandem aza-Wittig reaction with three component of vinyliminophosphorane 3,alkyl isocyanates and Na2S/HOAc.The reaction condition and the ...2-Thioxo-3-alkyl-5-phenylmethylidene-4-imidazolidinones 5 were synthesized via tandem aza-Wittig reaction with three component of vinyliminophosphorane 3,alkyl isocyanates and Na2S/HOAc.The reaction condition and the spectral properties of cyclized compounds were researched.All the structures of cyclized products were confirmed by elemental analysis,IR,1H NMR and MS.展开更多
文摘Nitrophenyl ferulate was synthesized in one step without the protection of the hydroxyl of ferulic acid in the presence of 1,3 dicyclohexylcarbodiimide(DCC) as the catalyst. Thus, 15 20 g of ferulic acid reacted with 18 07 g of 4 nitrophenol for 24 h at room temperature in the presence of 22 44 g of DCC. The crude product was recrystallized from CHCl 3 to give 16 00 g of 4 nitrophenyl ferulate and the yield was 82 5%. Elemental analysis, IR and 1H NMR techniques were used to prove the structure of the product.
文摘The title compound N,N′ ditosyl 3 methoxyimino 1,5 diaza cyclooctane(4) has been prepared by two methods,the reactions of all steps are carried out under very moderate conditions and the overall yield is high.The structures of the new compounds 2,3,4 are characterized by elemental analysis,IR, 1H NMR and MS spectroscopy.
文摘2-Thioxo-3-alkyl-5-phenylmethylidene-4-imidazolidinones 5 were synthesized via tandem aza-Wittig reaction with three component of vinyliminophosphorane 3,alkyl isocyanates and Na2S/HOAc.The reaction condition and the spectral properties of cyclized compounds were researched.All the structures of cyclized products were confirmed by elemental analysis,IR,1H NMR and MS.
