Asymmetric synthesis ofL-[4-13C]lysine by alkylation of oxazinone derivative as a chiral glycine equivalent
作者:Kazuhiko Takatori、Akira Hayashi、Masahiro Kajiwara
DOI:10.1002/jlcr.868
日期:2004.10.15
L-[4-13C]Lysine (2) was synthesized from sodium [2-13C]acetate (3) and Dellaria's oxazinone 1 as a chiral glycine equivalent. Wittig reaction of the glycinal 7 and 13C-labeled phosphonium ylide 5, prepared from sodium [2-13C]acetate (3), gave the α, β-unsaturated ester 8. The ester 8 was converted to the allylic bromide 10. Alkylation of the oxazinone 1 with 10 proceeded with high diastereoselectivity
L-[4-13C] 赖氨酸 (2) 由 [2-13C] 乙酸钠 (3) 和 Dellaria 的恶嗪酮 1 作为手性甘氨酸等价物合成。由 [2-13C] 乙酸钠 (3) 制备的甘氨酸 7 和 13C 标记的鏻叶立德 5 进行 Wittig 反应,得到 α, β-不饱和酯 8。酯 8 转化为烯丙基溴 10。恶嗪酮 1 与 10 以高非对映选择性进行。乙醇解、双键与二亚胺的氢化、手性助剂的去除和水解得到 L-[4-13C] 赖氨酸 (2)。版权所有 © 2004 John Wiley & Sons, Ltd.