申请人:Aventis Pharma S.A.
公开号:US06353108B1
公开(公告)日:2002-03-05
The invention concerns a method for preparing compounds of formula (I) wherein R represents a hydrogen atom or an allyl radical containing up to 8 carbon atoms, characterised in that it consists in subjecting a compound of formula (II) wherein alc represents the residue of an alkyl radical containing up to 4 carbon atoms to the action of a compound of formula (III): RCONH2, wherein R retains its previous meaning, to obtain the compound of formula (IV) wherein R retains its previous meaning which is subjected to cyclization to obtain the desired product of formula (I).
本发明涉及一种制备式(I)化合物的方法,其中R代表氢原子或含有最多8个碳原子的烯丙基基团,其特征在于将式(II)化合物暴露于式(III)化合物的作用下,其中alc代表含有最多4个碳原子的烷基基团的残基,式(III)化合物为RCONH2,其中R保留其先前的含义,以获得式(IV)化合物,其中R保留其先前的含义,然后进行环化反应以获得所需的式(I)化合物。