2,3,8,9-Tetrahydro-5H,6H-pyrano[4,3-d]thiazolo[3,2-a]pyrimidines of the structure ##STR1## are provided wherein R.sup.1 and R.sup.2 may be the same or different and are hydrogen, lower alkyl, halogen, cyano, carbethoxy, carboxyl, trifluoromethyl or lower alkoxy, and n is 2 or 3, and m is 0 to 2. These compounds are useful in the treatment of auto-immune disorders, such as rheumatoid arthritis.
提供了结构为##STR1##的2,3,8,9-四氢-5H,6H-
吡喃[4,3-d]
噻唑并[3,2-a]
嘧啶,其中R.sup.1和R.sup.2可以相同也可以不同,可以是氢、低碳基、卤素、
氰基、羧乙氧基、羧基、三
氟甲基或低碳基氧基,n为2或3,m为0至2。这些化合物在治疗自身免疫性疾病,如类风湿性关节炎方面有用。