A 4-fluorobiphenyl derivative of formula (I), which is useful as a cholesterol lowering agent or a lipid lowering agent because of its strong inhibitory effect on HMG-CoA reductase), and which is also useful as an intermediate for producing the above-mentioned cholesterol lowering agent or lipid lowering agent: ##STR1## wherein A is a .omega.-oxycarbonyldihydroxybutyl group, a tetrahydropyranyl group, a .omega.-oxycarbonyl-3-oxobutyl group, a formyl group, or a cyano group; R.sup.1 is a halogen atom, an alkyl group, or a group represented by R.sup.5 O--, wherein R.sup.5 is a hydrogen atom, or an alkyl group; R.sup.2 is a hydrogen atom, an alkyl group; R.sup.3 is a hydrogen atom, or an alkyl group; R.sup.5 and R.sup.2 may form a five-membered ring or a six-membered ring in combination with the oxygen atoms to which R.sup.5 and R.sup.2 are respectively bonded, and R.sup.5 and R.sup.3 may form a five-membered ring or a six-membered ring in combination with the oxygen atom to which R.sup.5 is bonded.
一种具有
化学式(I)的
4-氟联苯衍
生物,由于其对
HMG-CoA还原酶具有强烈的抑制作用,可用作降
胆固醇剂或降脂剂,并且还可用作生产上述降
胆固醇剂或降脂剂的中间体:##STR1## 其中A是ω-氧羰基二羟基丁基基团、
四氢吡喃基团、ω-氧羰基-3-氧代丁基基团、甲酰基团或
氰基;R1是卤素原子、烷基基团或由R5 O--表示的基团,其中R5是氢原子或烷基基团;R2是氢原子或烷基基团;R3是氢原子或烷基基团;R5和R2可以分别与它们相结合的氧原子形成五元环或六元环,R5和R3可以与R5结合的氧原子形成五元环或六元环。