1 Results Sulfonylsemicarbazide derivatives are important compounds as blowing agents in cellular rubber and plastics[1]. Different methods for the preparation of these compounds are reported. For example, sulfonylsem...1 Results Sulfonylsemicarbazide derivatives are important compounds as blowing agents in cellular rubber and plastics[1]. Different methods for the preparation of these compounds are reported. For example, sulfonylsemicarbazides are prepared by reaction of sulfinic acid salt with azodicarbonamide in water[2] and reaction of sulfonylchloride with semicarbazide[3-4]. In these methods the yields of products are not high[3-4], the solvent such as pyridine is toxic and also the sulfinic acid salt as starting...展开更多
A variety of novel N-t-butyl-N'-aminocarbonyl-N-(substitute)Benzoylhydrazines containing α-aminoalkylphosphonate groups were synthesized by the addition of N-t-butyl-N- (substituted)benzoylhydrazines to α-isocya...A variety of novel N-t-butyl-N'-aminocarbonyl-N-(substitute)Benzoylhydrazines containing α-aminoalkylphosphonate groups were synthesized by the addition of N-t-butyl-N- (substituted)benzoylhydrazines to α-isocyanatoalkylphosphonates. which were synthesized by the reaction of α-aminoalkylphosphonates with triphosgene in good yields. The structures of products including by-products were confirmed by 1H NMR, 31P NMR. IR, mass spectroscopy- and elemental analysis.展开更多
A convenient synthesis of various heterocyclic substituted ureidoalkylphosphonic acid diphenyl esters 3 is reported in this paper, alpha-Aminoalkylphosphonic acid diphenyl esters 1 reacted with triphosgene, and then t...A convenient synthesis of various heterocyclic substituted ureidoalkylphosphonic acid diphenyl esters 3 is reported in this paper, alpha-Aminoalkylphosphonic acid diphenyl esters 1 reacted with triphosgene, and then treated with heterocyclic amines gave 3. Small amount of symmetric urylenediphosphonate 4 are isolated as side products.展开更多
A practical synthetic method for methyl 1-oxo-1,2,3,4-tetrahydroisoquinoline-3-carboxylate was developed by means of triphosgene. Several analogues were prepared by this new method.
文摘1 Results Sulfonylsemicarbazide derivatives are important compounds as blowing agents in cellular rubber and plastics[1]. Different methods for the preparation of these compounds are reported. For example, sulfonylsemicarbazides are prepared by reaction of sulfinic acid salt with azodicarbonamide in water[2] and reaction of sulfonylchloride with semicarbazide[3-4]. In these methods the yields of products are not high[3-4], the solvent such as pyridine is toxic and also the sulfinic acid salt as starting...
基金This project was supported by the National Natural Science Foundation of Chinathe Natural Science Foundation of Tianjin.
文摘A variety of novel N-t-butyl-N'-aminocarbonyl-N-(substitute)Benzoylhydrazines containing α-aminoalkylphosphonate groups were synthesized by the addition of N-t-butyl-N- (substituted)benzoylhydrazines to α-isocyanatoalkylphosphonates. which were synthesized by the reaction of α-aminoalkylphosphonates with triphosgene in good yields. The structures of products including by-products were confirmed by 1H NMR, 31P NMR. IR, mass spectroscopy- and elemental analysis.
文摘A convenient synthesis of various heterocyclic substituted ureidoalkylphosphonic acid diphenyl esters 3 is reported in this paper, alpha-Aminoalkylphosphonic acid diphenyl esters 1 reacted with triphosgene, and then treated with heterocyclic amines gave 3. Small amount of symmetric urylenediphosphonate 4 are isolated as side products.
文摘A practical synthetic method for methyl 1-oxo-1,2,3,4-tetrahydroisoquinoline-3-carboxylate was developed by means of triphosgene. Several analogues were prepared by this new method.
