tetrabutylammomium bromide; Azide study of the hydrolysis of the p-nitrophenyl hexanoate in the presence of various tetraalkylammonium salts; determination of the relationship between the concentration of the tetraalkylammonium salts or of azide ion or time and reaction rate costant; KineticsMechanism;

1: H2O, erythromycin A-hydrolyse prod. (Z) / dioxane / 20 °C / pH 12.191 2: pyridine / 1 h View Scheme

N-hexadecyl-N,N,N-trimethylammonium bromide; N-decanoyl-L-histidine methyl ester in water T=25°C; pH=7.30; Rate constant;

tetradecyltrimethylammonium bromide; bovine serum albumin in water T=25°C;

phosphate buffer pH 7.30; N-hexadecyl-N,N,N-trimethylammonium bromide T=25°C; effect of surfactant and catalyst concentration on the rate constants; other reagents; Rate constant;

triethylamine in dichloromethane T=0 - 5°C; 1 h; Inert atmosphere;

4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide in dimethyl sulfoxide T=20°C; 8 h;

1: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C 2: Candida antarctica lipase B / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 3: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C 4: Candida antarctica lipase B / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 5: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C 6: Bacillus subtilis 168 SrfAD esterase / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 7: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C 8: Candida antarctica lipase B / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 9: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C 10: Candida antarctica lipase B / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 11: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C 12: Candida antarctica lipase B / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 13: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C 14: Bacillus subtilis 168 SrfAD esterase / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 15: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C 16: Bacillus subtilis 168 SrfAD esterase / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 17: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C 18: Bacillus subtilis 168 SrfAD esterase / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 19: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C 20: Bacillus subtilis 168 SrfAD esterase / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 21: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C 22: Bacillus subtilis 168 SrfAD esterase / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 23: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C 24: Candida antarctica lipase B / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 25: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C 26: Bacillus subtilis 168 PnbA esterase / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 27: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C View Scheme

1: Candida antarctica lipase B / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 2: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C 3: Candida antarctica lipase B / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 4: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C 5: Candida antarctica lipase B / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 6: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C 7: Bacillus subtilis 168 SrfAD esterase / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 8: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C 9: Bacillus subtilis 168 SrfAD esterase / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 10: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C 11: Bacillus subtilis 168 SrfAD esterase / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 12: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C 13: Bacillus subtilis 168 SrfAD esterase / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 14: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C 15: Bacillus subtilis 168 SrfAD esterase / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 16: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C 17: Candida antarctica lipase B / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 18: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C 19: Bacillus subtilis 168 PnbA esterase / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 20: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C View Scheme

1: Candida antarctica lipase B / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 2: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C 3: Candida antarctica lipase B / dimethyl sulfoxide / 0.05 h / 30 °C / pH 7 / aq. phosphate buffer; Enzymatic reaction 4: 4-(N,N-dimethlyamino)pyridine; dicyclohexyl-carbodiimide / dimethyl sulfoxide / 8 h / 20 °C View Scheme