Fluorinated Amino acids and amines, compositions and process for preparing said compounds.
a-Difluoromethyl-3,4- di-OR-phenylalanines and its esters, and (1-difluoromethyl)- and 1-(trifluoromethyl)-2-(3,4-di-OR- phenyl) ethylamines, wherein R is hydrogen or a C2-C6 alkanoyl, have been prepared.
Homoveratric acid is transformed into veratryl- difluoromethyl- ketone or veratryl- trifluoro- methyl- ketone, this reacts with methoxyamine, and the obtained O-methyl-oxime is reduced to the amine. The 3- and 4-methoxygroups are hydrolysed into hydroxy-groups.
Reaction of veratryl- difluoromethylketone with ammonium-carbonate and sodium cyanide yields a-difluoromethyl -5-(3',4'- dimethoxybenzyl)-2,4-imidazolidine-dione, hydrolysis results in α-difluoromethyl-3- hydroxytyrosine. The compounds have Dopa-decarboxylase inhibiting activity and some of them are antihypertensive agents.
氟化
氨基酸和胺、制备上述化合物的组合物和工艺。
已制备出 a-二
氟甲基-3,4-二-OR-苯丙
氨酸及其酯,以及 (1-difluoromethyl)- 和 1-(trifluoromethyl)-2-(3,4-di-OR-苯基)
乙胺,其中 R 为氢或 C2-C6 烷酰基。
高
藜芦酸转化为藜芦基二
氟甲基酮或藜芦基三
氟甲基酮,与
甲氧基胺反应,得到的 O-甲基
肟被还原成胺。3- 和 4-甲氧基被
水解为羟基。
藜芦基二
氟甲基酮与
碳酸铵和
氰化钠反应生成 a-二
氟甲基-5-(3',4'-二甲氧基苄基)-2,4-
咪唑烷二酮,
水解后得到 α-二
氟甲基-3-羟基
酪氨酸。这些化合物具有多巴脱羧酶抑制活性,其中一些还是降压药。