Decarboxylation, during their aromatization by Pd/C, of some 3,4-octahydronaphtho-7,8-benzocoumarins
作者:K. Chebaane、M. Guyot
DOI:10.1016/0040-4020(77)80188-9
日期:1977.1
Some 3',4'-cyclohexa-1',2'-dihydro- and 1',2'-cyclohexa-3',4'-dihydro-3,4,7,8-dibenzocoumarins 2 and 3 were prepared by catalytic condensation between a naphthol and a α-carbethoxy-cis- decalone (−1 or −2). These compounds, when treated with Pd/C at 260°, undergo, beside aromatization, a complete decarboxylation of the lactone ring. A mechanism, involving H transfer through a π-allylic palladium complex
通过催化制备一些3',4'-环己-1',2'-二氢-和1',2'-环己-3',4'-二氢-3,4,7,8-二苯并香豆素2和3萘酚和α-甲氧基-顺式十萘烷之间的缩合(-1或-2)。这些化合物在260°下用Pd / C处理后,除了芳香化外,还会经历内酯环的完全脱羧。描述了涉及通过π-烯丙基钯络合物进行H转移的机理。