Synthesis of the suicide substrate D-propargylglycine stereospecifically labelled with deuterium and investigation of its oxidation by D-amino acid oxidase 1
作者:Nicola J. Church、Douglas W. Young
DOI:10.1039/a800579f
日期:——
Stereospecifically deuteriated samples of D-propargylglycine 1 have been prepared by reaction of the labelled Pmc-protected aziridine free acids 22 with a lithium acetylide followed by deprotection. These samples have been used to show that D-amino acid oxidase, in converting D-propargylglycine to the lactone 5, deprotonates C-3 in a non-stereospecific manner. This strongly supports the idea that non-enzymic deprotonation is a key step in the formation of this compound.
通过标记的 Pmc 保护氮丙啶游离酸 22 与乙酰化锂反应,然后进行脱保护,制备出了 D-丙炔甘氨酸 1 的立体特异性脱质子样品。这些样品被用来证明 D-氨基酸氧化酶在将 D-丙炔基甘氨酸转化为内酯 5 的过程中,以非立体特异性的方式使 C-3 去质子化。这有力地支持了非酶促去质子化是形成这种化合物的关键步骤这一观点。