The molecular rearrangement during catalytic dehydrogenation of synthesized substituted spiro compounds
作者:Ashutosh Mitra、Tapan K. Biswas、Rebati M. Ray
DOI:10.1016/s0040-4020(01)88340-x
日期:1992.11
Catalytic dehydrogenation of 7′-methyl-1-hydroxyspiro [tetralin-2, 1′-tetralin] 5 and 7′-ethyl-7-methyl-1-hydroxyspiro [tetralin-2,1′-tetralin] 5a afforded 3-methylchrysene 7 and 3-ethyl-9-methylchrysene 7a respectively. Condensation of anhydride 1 of 1-carboxy-7-methyltetralin-1-acetic acid with benzene and that of anhydride 1a of 1-carboxy-7-ethyltetralin-1-acetic acid with toluene gave the corresponding
7'-甲基-1-羟基螺[tetralin-2,1'-tetralin] 5和7'-乙基-7-甲基-1-羟基螺[tetralin-2,1'-tetralin] 5a的催化脱氢得到3-甲基丙烯7和3-乙基-9-甲基丙烯7a。酸酐的缩合1酸酐与苯和1-羧基-7- methyltetralin -1-乙酸1A的1-羧基-7- ethyltetralin -1-乙酸与甲苯,得到相应的酮-酸2和2a中,其上催化还原得到丁酸3和3a。酸环化(3和3a)提供了螺酮4和4a。用LAH还原螺酮(4和4a)得到螺碳化合物5和5a。