Novel bicyclic tetrahydroxylated pyrrolizidines are disclosed which are inhibitors of glycosidase enzymes. A preferred inhibitor is 1.alpha., 2.alpha., 6.alpha., 7.alpha., 7.alpha..beta.-1,2,6,7-tetrahydroxypyrrolizidine. It is synthesized from D-glycero-D-gulo-heptono-1,4-lactone. Novel Intermediate compounds prepared during this synthesis are 7-O-tert-butyldiphenylsilyl-2,3:5,6-di-O-isopropylidene-D-glycero-D-gulo-h ept ono-1,4-lactone and 1.alpha., 2.alpha., 6.alpha., 7.alpha., 7.alpha..beta.-1,2:6,7-di-O-isopropylidene-1,2,6,7-tetrahydroxypyrrolizidi ne.
本发明涉及一种新型的双环四羟基
吡咯烷衍
生物,其为糖苷酶酶
抑制剂。其中一种优选的
抑制剂为1α、2α、6α、7α、7α.β-1,2,6,7-四羟基
吡咯烷。该化合物是由D-
甘露醇-D-戊糖-1,4-内酯合成的。在该合成过程中,制备了一些新型的中间体化合物,包括7-O-叔丁基二苯基
硅基-2,3:5,6-二-O-异丙基亚甲基-D-
甘露醇-D-戊糖-1,4-内酯和1α、2α、6α、7α、7α.β-1,2:6,7-二-O-异丙基亚甲基-1,2,6,7-四羟基
吡咯烷。