Spiro-compounds, synthesis and catalytic dehydrogenation of substituted spiro[5,5] undecanes
作者:A. Mitra、M. Dutta Gupta
DOI:10.1016/0040-4020(76)80114-7
日期:1976.1
bulky alkyl group on the ring in the ring transformation of the spiro[5,5]undecane system. The catalytic dehydrogenation of the spiro-compound 5(R = H) gave phenanthrene and 1-ethylpyrene (minor product) and spiro compound 5(R = Me) gave only 3-methylphenanthrene. For the synthesis of 5 (R = H or Me), the anhydride (1) of 1-carboxy-2-propylcyclohexane-1-acetic acid was condensed with benzene and toluene