Enantiopure D-, L- (and 2-epi-) Purpurosamine C-Type Glycosyl Donors from Racemic Acrolein Dimer − Biocatalytic Resolution
作者:Silke Erbeck、Xifu Liang、Richard Krieger、Horst Prinzbach
DOI:10.1002/(sici)1099-0690(199803)1998:3<481::aid-ejoc481>3.0.co;2-z
日期:1998.3
Both enantiomers of purpurosamine C-type glycosyl donors [(ent)-9, (ent)-10, (ent)-11] and of a 2-azido epimer [(ent)-14] with a modified pattern of protecting groups have been prepared from racemic 3,4-dihydro-2H-pyran-2-carbaldehyde (acrolein dimer, rac-1, “indirect aziridination”, “azidonitration”). In two cases (rac-23β: methyl 6-O-acetyl-2,3,4-trideoxy-2α-trifluoroacetylamino-β-D/L-hexopyranoside
purpurosamine C 型糖基供体 [(ent)-9, (ent)-10, (ent)-11] 和 2-叠氮基差向异构体 [(ent)-14] 的两种对映体都具有修饰的保护基团模式由外消旋 3,4-二氢-2H-吡喃-2-甲醛(丙烯醛二聚体,rac-1,“间接氮丙啶化”,“叠氮硝基化”)制备。在两种情况下(rac-23β:甲基 6-O-乙酰基-2,3,4-trideoxy-2α-trifluoroacetylamino-β-D/L-hexopyranoside,rac-32:甲基 6-O-acetyl-2β-azido- 2,3,4-三脱氧-β-D/L-吡喃己糖苷),通过生物催化实现了有效的分离。