2, 7-Deoxy-7-fluoro-2, 3-didehydrosialic acid of general formula (IV) and intermediates therefor of general formulae (II) and (III); in formula (II), R represents aliphatic acyl; R¹ represents lower alkyl; R²s represent each independently aliphatic or aromatic acyl; and R³ represents halogen; in formula (III), R represents aliphatic acyl; R¹ represents lower alkyl; R²s represent each independently halogen, or aliphatic or aromatic acyl; and R⁴ represents thioacyl, thioalkyl or thioaryl; each being useful for developing practical medicines such as antiviral agents and preventives for viral diseases, and also as anticancer drugs and immunoregulators.
通式(IV)的2,7-脱氧-7-
氟-2,3-二
脱氢乙酸及其通式(II)和(III)的中间体;在式(II)中,R代表脂肪酰基;R¹代表低级烷基;R²s各自独立地代表脂肪酰基或芳香酰基;R³代表卤素;在式(III)中,R代表脂肪酰基;R¹代表低级烷基;R²s各自独立地代表卤素、脂肪酰基或芳香酰基;R⁴代表
硫代酰基、
硫代烷基或
硫代芳基;它们都有助于开发实用药物,如抗病毒剂和病毒性疾病预防剂,以及抗癌药物和免疫调节剂。