4-dihydro-4-oxothieno[2,3-d]pyrimidine-2-carboxylic acid derivatives has been prepared and tested for antiallergenic activity. Members of the series, including both carboxylic acid salts and esters, have been found to exhibit oral activity in the rat passive cutaneous anaphylaxis (PCA) test. Activity is optimized by H or CH3 substitution at the 5 position and lower alkyl groups at the 6 position. Ethyl 6-ethyl-3
已经制备了一系列新颖的3,4-二氢-4-氧杂
噻吩并[2,3-d]
嘧啶-2-
羧酸衍
生物,并测试了其抗过敏活性。已发现该系列的成员,包括
羧酸盐和酯,在大鼠被动性皮肤过敏反应(PCA)测试中表现出口服活性。通过在5位取代H或
CH3,在6位取代低级烷基,可以优化活性。乙基6-乙基-3,4-二氢-4-氧杂
噻吩并[[2,3-d]
嘧啶-2-
羧酸酯和3,4-二氢-5-甲基-6-(2-甲基丙基)-4-氧
噻吩并[ 2,3-d]
嘧啶-2-
羧酸二
钾盐分别是最有效的酯和盐。