4-Methyl-3,4-dihydrospiro[cycloheptane-1′,2(1<i>H</i>)-quinoline] and 4-methyl-3,4-dihydrospiro[cyclooctane-1′,2(1<i>H</i>)-quinoline]. synthesis of derivatives and chemical transformations
New derivatives of 3,4-dihydrospiro[cycloalkane-1′,2(1H)-quinolines] were obtained from cycloheptanone and cyclooctanone via facile three steps hetero spiro annulation process. Their nitro derivatives were prepared through electrophilic substitution reactions.