An asymmetric synthesis of l-[3-13C]phenylalanine and l-[3-13C]tyrosine from [13C]carbon monoxide
作者:Kazuhiko Takatori、Mikiko Nishihara、Yukie Nishiyama、Masahiro Kajiwara
DOI:10.1016/s0040-4020(98)00995-8
日期:1998.12
l-[3-13C]Phenylalanine and l-[3-13C]tyrosine were synthesized. [α-13C]Benzyl bromides were prepared from [13C]carbon monoxide via the palladium-catalyzed carboalkoxylation of aryl halides. The asymmetric carbon corresponding to the 2-position in phenylalanine was introduced by the diastereoselective alkylation of Dellaria's oxazinone with [α-13C]benzyl bromides. Finally, ethanolysis, deprotection,
合成了1- [3- 13 C]苯丙氨酸和1- [3- 13 C]酪氨酸。[α- 13是从[制备C]苄基溴化物13 C]一氧化碳通过芳基卤化物的钯催化carboalkoxylation。对应于苯丙氨酸2-位的不对称碳是由Dellaria的恶嗪酮的非对映烷基化引入的[α- 13 C]苄基溴化物。最后,所得烷基化的恶嗪酮的乙醇解,脱保护,氢解和酸水解以高光学纯度得到1- [3- 13 C]苯丙氨酸和1- [3- 13 C]酪氨酸。