Deoxyiminoalditols from aldonolactones — V. Preparation of the four stereoisomers of 1,5-dideoxy-1,5-iminopentitols. Evaluation of these iminopentitols and three 1,5-dideoxy-1,5-iminoheptitols as glycosidase inhibitors
作者:Michael Godskesen、Inge Lundt、Robert Madsen、Bryan Winchester
DOI:10.1016/s0968-0896(96)00167-8
日期:1996.11
synthesized. The corresponding aldonolactones (1, 7 and 11) or aldonic acid ester (15b) having a leaving group at C-5 gave by reaction with aqueous ammonia, the 5-amino-5-deoxy-1,5-lactams, 2, 8, 12 and 17, respectively. Reduction of the lactam function using sodium borohydride/acetic or trifluoroacetic acid, or borane dimethyl sulfide complex yielded the iminopentitols. The compounds 3, 9, 13 and 18, together
四种立体异构体1,5-二脱氧-1,5-亚氨基戊醇与D-阿拉伯糖(-D-lyxo-)(3),ribo-(9),L-lyxo(L-阿拉伯糖-)(13)和xylo (18)合成了构型。通过与氨水反应生成相应的C-5上具有离去基团的醛内酯(1、7和11)或醛糖酸酯(15b),5-氨基-5-脱氧-1,5-内酰胺2、2、8 ,12和17。使用硼氢化钠/乙酸或三氟乙酸或硼烷二甲基硫醚络合物降低内酰胺功能,得到亚氨基戊糖醇。测试了化合物3、9、13和18以及三种1,5-二脱氧-1,5-亚氨基庚糖醇19,20和21对人肝提取物中糖苷酶活性的抑制作用。化合物18是有效的β-葡萄糖苷酶抑制剂,化合物19是中等良好的β-葡萄糖苷酶抑制剂。化合物3与19、20和21一起,