申请人:Societe de Conseils de Recherches et D'Applications Scientifiques
公开号:US04383998A1
公开(公告)日:1983-05-17
This invention relates to new 1,3-dihydro-6-methyl-7-hydroxy-furo-(3,4-c)-pyridine derivatives of the general formula ##STR1## wherein A< represents a group of the formula --(CH.sub.2).sub.n --, n being an integer of from 1 to 5, or a homocyclic or heterocyclic group, and R represents a hydrogen, chlorine or fluorine atom, a trifluoromethyl group, an alkyl group having from 1 to 5 carbon atoms, an alkoxy group having from 1 to 5 carbon atoms, a alkylthio group having from 1 to 5 carbon atoms, a dialkylaminoalkoxy group in which the alkyl groups each have from 1 to 5 carbon atoms and the alkoxy group has from 1 to 5 carbon atoms or a N-pyrolidinyl-alkoxy group in which the alkoxy group has from 1 to 5 carbon atoms to a process for the preparation of the same by refluxing .alpha..sup.4, 3-o-isopropylidene-pyridoxal with a compound of the general formula X-A-R, wherein X represents a bromine or iodine atom, in the presence of magnesium in diethyl ether, and acidifying the resultant corresponding secondary alcohol .alpha..sup.4, 3-o-isopropylidene-.alpha.-hydroxy-5-substituted-pyridoxine to break the isopropylidene ring and promote a 3,4 cyclization; and to therapeutical compositions of matter comprising as an essential ingredient therein an effective amount of one of these compounds.
本发明涉及新的1,3-二氢-6-甲基-7-羟基呋喃-(3,4-c)-吡啶衍生物,其一般式为##STR1##其中A<表示式--(CH.sub.2).sub.n --的基团,n为1至5的整数,或是同环或异环基团,R表示氢、氯或氟原子、三氟甲基基团、具有1至5个碳原子的烷基基团、具有1至5个碳原子的烷氧基团、具有1至5个碳原子的烷硫基团、其中烷基团各自具有1至5个碳原子,烷氧基团具有1至5个碳原子的二烷基氨基烷氧基基团,或者是其中烷氧基具有1至5个碳原子的N-吡咯烷氧基基团。本发明还涉及一种制备该衍生物的方法,方法是通过在二乙醚中在镁的存在下回流α.sup.4,3-o-异丙亚甲基-吡哆醛和一般式为X-A-R的化合物,其中X表示溴或碘原子,然后酸化所得的相应的次级醇α.sup.4,3-o-异丙亚甲基-α-羟基-5-取代吡哆醇,以打破异丙亚甲基环并促进3,4环化;以及包含这些化合物的治疗组成物,其中这些化合物是其必需成分。