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
1-丙基-8,9-苯并螺[5,5]十一烷-7-ol(5:R = H)和1-丙基-3'-甲基-8,9-苯并螺[5,5]的催化脱氢进行了十一烷-7-醇(5:R = Me)的研究,以研究大分子烷基对螺[5,5]十一烷体系环转化的影响。螺环化合物5(R = H)的催化脱氢得到菲和1-乙基py(次要产物)和螺环化合物5(R = Me)仅得到3-甲基菲。为了合成5(R = H或Me),将1-羧基-2-丙基环己烷-1-乙酸的酸酐(1)与苯和甲苯缩合,得到2(R = H或Me),将其还原催化地3(R = H或Me)。分子内酰化3(R = H或Me)得到的螺酮(4:R = H或Me)被还原为5(R = H或Me)。