INOSOSE DERIVATIVES AND PRODUCTION THEREOF

摘要

The novel inosose derivatives wherein Y<1> stands for hydroxyl group and Y<2> stands for a hydrgen atom, or Y<1> and Y<2> are jointly combined to be a bond between carbon and carbon atoms, and R<1> is a protective group for a hydroxyl group, are useful as a starting material for producing valienamine, valiolamine and their N-substituted derivatives. Valienamine, valiolamine and their N-substituted derivatives have an inhibitory activity against alpha -glucosidase and are useful as prophylactic or therapeutic agents of hyperglycemic symptoms in man and other animals and various disorders caused by hyperglycemia such as diabetes, obesity, hyperlipemia, etc.