| Abstrakt: |
1.1,1,2-Trimethylcyclopropane (46%) and 1-chloro-1,2,2-trimethylcyclopropane (13%) were obtained from 2,2,4-trichloro-4-methylpentane, while 1-(ß-chloroethyl)-2,2-dimethylcyclopropane (18%), 1-chloro-1-(ß-chloroethyl)-2,2-dimethylcyclopropane (16%), and isobutylidenecyclopropane (25%) were obtained from 1,3,3,5-tetrachloro-5-methylhexane. As a result, it was shown that a chlorine atom, attached to a tertiary C atom, is involved in reductive cyclization.2.It was shown for the first time that the process has a stepwise course: 1,3-dechlorination occurs initially, which leads to the formation of chlorocyclopropanes. Then the chlorine atom in the chlorocyclopropane is either replaced by hydrogen or else it is dehydrochlorinated to a cyclopropane with an exocyclic multiple bond. |
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