A process for the stereoselective preparation of 5-substituted .delta.-lactones of the formulae Ia, Ib, Ic and Id ##STR1## in which R.sup.1 is a straight-chain or branched alkyl or alkenyl group or methylhydroxy, novel 5-substituted .delta.-lactones and novel intermediates, and use thereof as pharmaceuticals having cholesterol synthesis-inhibiting action, fragrances and flavorings is described.
本发明涉及一种立体选择性制备式Ia、Ib、Ic和Id的5-取代.delta.-内酯的方法,其中R.sup.1是直链或支链烷基或烯基或甲基羟基,新颖的5-取代.delta.-内酯和新颖的中间体,以及作为具有抑制
胆固醇合成作用的药物、
香料和调味剂的用途。