N-三氟乙酰-L-苯丙氨酸甲酯是一种苯丙氨酸衍生物。
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
N-(三氟乙酰基)-2-氨基-3-苯基丙酸乙酯 | ethyl N-(trifluoroacetyl)-2-amino-3-phenylpropanoate | 16417-60-0 | C13H14F3NO3 | 289.254 |
—— | N-trifluoroacetyl-L-phenylalanine | 350-09-4 | C11H10F3NO3 | 261.201 |
N-(苄氧羰基)-L-苯丙氨酸甲酯 | N-carbobenzoxy-L-phenylalanine methyl ester | 35909-92-3 | C18H19NO4 | 313.353 |
L-苯丙氨酸甲酯 | methyl (2S)-2-amino-3-phenylpropanoate | 2577-90-4 | C10H13NO2 | 179.219 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (trifluoroacetyl)-p-nitro-L-phenylalanine methyl ester | 96760-73-5 | C12H11F3N2O5 | 320.225 |
The subtilisin Carlsberg catalysed transesterification of N-acetyl phenylalanine methyl ester (1), N-acetyl phenylalanine ethyl ester (2), N-trifluoroacetyl phenylalanine methyl ester (3) and N-trifluoroacetyl phenylalanine ethyl ester (4) was studied in supercritical carbon dioxide. The water content of the reaction affects the reactivity of the system; for the transesterification of the methyl esters with ethanol the optimum concentration of water was determined to be about 0.74 M, while for the transesterification of the ethyl esters with methanol the optimum concentration of water was about 1.3 M. The conversion is also dependent upon the concentration of alcohol; for ethanol, 2% v/v gives the maximum conversion, whilst for methanol, only 0.8-1.2% v/v is required. This is probably due to a difference in the solubility of the substrates in the two alcohol/supercritical carbon dioxide mixtures. The reaction is highly stereoselective, in all cases no evidence for reaction of the D-isomer could be detected by chiral gas chromatography.