A facile approach to norbornene-annulated cyclopentenones, a novel class of tricyclodecadienones
作者:Jie Zhu、Antonius J.H Klunder、Binne Zwanenburg
DOI:10.1016/0040-4020(95)98708-p
日期:1995.4
An efficient synthesis of norbornene annulated cyclopentenones and starting from readily available tricyclodecadienone carboxylic acid is described. Parent tricyclo[5.2.1.02,6]decadi-2(6),8-ene , an hitherto unknown compound, has been obtained in good yield by subjecting bromide to base induced elimination or by oxidative deselenylation of . 5-Substituted analogues are conveniently obtained from phenylselenide
描述了降冰片烯环化的环戊烯酮的有效合成,并从容易获得的三环癸二烯酮羧酸开始。母体三环[5.2.1.0 2,6 ]癸二-2(6),8-烯(一种迄今未知的化合物)已通过使溴化物进行碱诱导的消除或氧化的脱硒基化反应以高收率获得。通过立体选择性共轭铜酸盐的添加,然后氧化消除硒基,可以从苯硒化物中方便地获得5-取代的类似物。环氧溴化物的脱氢溴化作用提供了降冰片烯环化的环戊二烯酮,该环戊二烯酮可在应变C上立即进行立体选择性1,4加成生成2 –C 6烯酮部分。这些新颖的降冰片烯环化的环戊烯酮可以被认为是2-环戊炔酮的合成等同物。