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.
A heptanoate derivative of formula (I):
wherein R¹ and R² are independently a hydrogen atom or a protective group for hydroxyl group, or R¹ and R² integrally constitute a protective group for hydroxyl groups; and R³ is a hydrogen atom, an alkyl group, or an aromatic hydrocarbon group.
Methods of producing carboxylic acid ester derivatives and intermediates
申请人:Fujirebio Inc.
公开号:US05481009A1
公开(公告)日:1996-01-02
Methods of producing carboxylic acid ester derivatives of formulae (I) and (II), which are useful, for instance, as intermediates for producing an anti-hypercholesterolemic agent having an inhibitory effect on HMG-CoA Reductase: ##STR1## wherein R.sup.1 and R.sup.2 are independently a protective group for hydroxyl group, or R.sup.1 and R.sup.2 integrally constitute a protective group for hydroxyl groups; R.sup.3 is an alkyl group, or an aryl group; and R.sup.4 is a substituted aryl group, a substituted heterocyclic group, a substituted vinyl group, or a substituted cycloalkenyl group; and ##STR2## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are respectively the same as defined in the above formula (I), are disclosed. In addition, intermediates for use in these methods of producing the carboxylic acid ester derivatives are disclosed.