申请人:BASF Aktiengesellschaft
公开号:US04069258A1
公开(公告)日:1978-01-17
Cyclopentene derivatives (I) ##STR1## where R.sup.1 is isopropyl or isopropenyl, R.sup.2 is alkyl of 1 to 3 carbon atoms, X is --CHO, a dialkyl acetal or 1,2- or 1,3-alkylene acetal thereof where the acetal radical is of 2 to 6 carbon atoms, --CH.sub.2 OH or --CH.sub.2 OCOR.sup.3 where R.sup.3 is hydrogen or alkyl or alkenyl of up to 3 carbon atoms. The manufacture of I from the corresponding halomethyl cyclopentenes and aldehydes R.sup.2 --CH(CH.sub.3)--CHO in the presence of a base and a quaternary ammonium salt, followed if desired by acetalization or conversion of the --CHO group to the --CH.sub.2 OH or --CH.sub.2 O--CO--R.sup.3 groups. The compounds are useful as fragrance materials.
环戊烯衍生物(I) ##STR1## 其中R.sup.1为异丙基或异丙烯基,R.sup.2为1至3个碳原子的烷基,X为--CHO、二烷基缩醛或其1,2-或1,3-烷基缩醛,其中缩醛基团为2至6个碳原子,--CH.sub.2 OH或--CH.sub.2 OCOR.sup.3,其中R.sup.3为氢、烷基或烯基,碳原子数最多为3个。从相应的卤代甲基环戊烯和醛R.sup.2--CH(CH.sub.3)--CHO在碱和季铵盐的存在下制备出I,然后如果需要的话进行缩醛化或将--CHO基团转化为--CH.sub.2 OH或--CH.sub.2 O--CO--R.sup.3基团。这些化合物可用作香料材料。