This appliciation discloses a process for preparing a lactone of general formula (I), where R is an optionally substituted phenyl group or an optionally substituted mono- or bicyclic heteroaryl radical which process comprises reacting an anion of a malonate of formula (II) with an ethylene compound of formula (III) Y--CH.sub.2 --CH.sub.2 OZ, to give a compound of formula (IV) and hydrolysing the compound of formula (IV) to give a lactone of formula (I). The lactones are of use as intermediates for preparing 5-HT.sub.1A binding agents. ##STR1##
本申请公开了一种制备通式(I)的内酯的方法,其中R是可选择性取代的苯基或可选择性取代的单环或双环杂环基团,该方法包括将式(II)的马隆酸盐的阴离子与式(III)的
乙烯化合物Y-CH.sub.2-CH.sub.2OZ反应,得到式(IV)的化合物,然后
水解式(IV)的化合物,得到式(I)的内酯。这些内酯可用作制备5-HT.sub.1A结合剂的中间体。##STR1##