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a process which requires the intermediacy of the imminium ion £¬which subsequently cyclizes to give the corresponding quinoline viaoss of dimethylamine. Similar imminium ions have been reported to be formed from the reaction o f pchlorovinyl aldehydes with primary arylamines at room temperature, which could either be isolated o r cyclized directly to the corresponding quinolin ,although nitro-substituted arylamines didnot give the required quinoline

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