Condensation of trialkyl esters of 6-substituted 2-carboxy-1,7-heptanedioic acids XII-XVII with urea or thiourea and subsequent saponification gave 2-substituted 5-(2,6-dihydroxy-4-oxo-3,4-dihydro-5-pyrimidinyl)pentanoic acids II-VI or 5-(2-mercapto-6-hydroxy-4-oxo-3,4-dihydro-6-pyrimidinyl)pentanoic acids VII-XI, respectively. Compounds II, VII and X had a weak antineoplastic effect in animals with experimental transplantable tumours.
将6-取代2-羧基-1,7-庚二酸三烷酯XII-XVII与尿素或硫脲缩合,随后皂化得到2-取代5-(2,6-二羟基-4-氧代-3,4-二氢-5-嘧啶基)戊二酸II-VI或5-(2-巯基-6-羟基-4-氧代-3,4-二氢-6-嘧啶基)戊二酸VII-XI。化合物II、VII和X在实验性可移植肿瘤动物中具有微弱的抗肿瘤作用。