(+)-Lentiginosine (14) and (7R)-7-hydroxylentiginosine (26), powerful inhibitors of amyloglucosidases, and their enantiomers were obtained in high overall yields by a multistep synthesis involving 1,3-dipolar cycloaddition of enantiopure tartaric acid derived pyrroline N-oxides. Structurally related (S,S)-3,4-dihydroxypyrrolidines 29-33 were synthesized as simpler models and tested towards 24 glycosidases.
(+)-Lentiginosine(14)和(7R)-7-羟基lentiginosine(26)及其对映体作为高活性的淀粉
葡萄糖苷酶
抑制剂,通过多步合成路线,从结构明确的
酒石酸衍生的
吡咯啉N-氧化物出发,经1,3-偶极环加成反应,以较高总产率成功获得。此外,合成了一系列结构相关的(S,S)-3,4-二羟基
吡咯啶(29-33)作为简化模型,并对24种糖苷酶进行了活性测试。