Scalable Syntheses of Both Enantiomers of DNJNAc and DGJNAc from Glucuronolactone: The Effect of N-Alkylation on Hexosaminidase Inhibition
作者:Andreas F. G. Glawar、Daniel Best、Benjamin J. Ayers、Saori Miyauchi、Shinpei Nakagawa、Matilde Aguilar-Moncayo、José M. García Fernández、Carmen Ortiz Mellet、Elizabeth V. Crabtree、Terry D. Butters、Francis X. Wilson、Atsushi Kato、George W. J. Fleet
DOI:10.1002/chem.201200110
日期:2012.7.23
The efficient scalable syntheses of 2‐acetamido‐1,2‐dideoxy‐D‐galacto‐nojirimycin (DGJNAc) and 2‐acetamido‐1,2‐dideoxy‐D‐gluco‐nojirimycin (DNJNAc) from D‐glucuronolactone, as well as of their enantiomers from L‐glucuronolactone, are reported. The evaluation of both enantiomers of DNJNAc and DGJNAc, along with their N‐alkyl derivatives, as glycosidase inhibitors showed that DGJNAc and its N‐alkyl derivatives
2-乙酰氨基-1,2-双脱氧-D-半乳糖-野尻霉素(DGJNAc)和2-乙酰氨基-1,2-双脱氧-D-葡萄糖-野尻霉素(DNJNAc )的高效可扩展合成,以及据报道,它们的对映异构体来自L-葡糖醛酸内酯。DNJNAc 和 DGJNAc 的两种对映异构体及其N-烷基衍生物作为糖苷酶抑制剂的评估表明,DGJNAc 及其N-烷基衍生物都是 α-GalNAcase 的抑制剂,但没有一种差向异构 DNJNAc 衍生物抑制这种酶。相比之下,DGJNAc 和 DNJNAc 以及它们的烷基衍生物都是 β-GlcNAcases 和 β-GalNAcases 的有效抑制剂。两种L-对映异构体均未显示出对所测试的任何酶的任何显着抑制。通过对溶酶体酶抑制的游离寡糖分析,体外抑制与细胞数据的相关性揭示了以下结构-性质关系:疏水侧链优先促进亚氨基糖在细胞内接近那些具有更多亲水性的抑制剂- 链特征。