Disclosed is a novel inosose compound represented by the general formula: ##STR1## wherein X.sup.1 and X.sup.2 are both halogen; X.sup.1 is hydrogen and X.sup.2 is halogen; or X.sup.1 is --SQ.sup.1 and X.sup.2 is --SQ.sup.2 (each of Q.sup.1 and Q.sup.2 is lower alkyl or Q.sup.1 and Q.sup.2 may form lower alkylene), R.sup.1 is a protective group for hydroxyl and Y is .dbd.O, .dbd.N--Z (Z is hydroxyl which may be protected) or ##STR2## (A is hydrogen or an amine residue), particularly to the compound wherein the symbol Y is oxygen. The inosose compound is useful as intermediates for production of valiolamine and the N-substituted derivatives thereof, which have potent .alpha.-glucosidase inhibiting activities and are useful as preventives or therapeutics for symptoms of hyperglycemia and various diseases derived therefrom in human and animals, such as diabetes, obesity and hyperlipemia.
本发明涉及一种新的肌醇糖化合物,其通式为:##STR1## 其中X.sup.1和X.sup.2均为卤素;X.sup.1为氢,X.sup.2为卤素;或者X.sup.1为--SQ.sup.1,X.sup.2为--SQ.sup.2(其中每个Q.sup.1和Q.sup.2为低级烷基,或Q.sup.1和Q.sup.2可形成低级烷基烯),R.sup.1是羟基的保护基,Y为.dbd.O,.dbd.N--Z(其中Z是可保护的羟基)或##STR2##(其中A是氢或胺基残基),特别是其中符号Y为氧的化合物。该肌醇糖化合物可用作生产瓦利奥拉胺及其N-取代衍
生物的中间体,这些衍
生物具有强效的α-
葡萄糖苷酶抑制活性,并可用作人类和动物中由高血糖症状引起的各种疾病的预防或治疗,如糖尿病、肥胖症和高脂血症。