Synthesis of Substituted Hexacyclo[5.4.1.02,6.03,10.05,9.08,11]dodecanes. A Novel Method for Bridging Across the 8,11-positions of Pentacyclo[5.4.0.02,6.03,10.05,9]undecane- 8,11-dione and Related Diketones
作者:Alan P. Marchand、Dayananda Rajapaksa
DOI:10.1016/s0040-4039(00)60319-2
日期:1993.2
Reaction of pentcylco[5.4.0.02.6.03,10.05.9]undecane-8,11-dione mono(ketene dithioacetal), 2, with hydrogen at 50 psig over palladized charcoal catalyst results in reductive cyclization, thereby affording the corresponding bridged dithioketal, 3. The results of similar reactions with other cage and noncage 1,4-dione systems point to the need for spatial proximity between reacting centers in order to
戊烷[5.4.0.0 2.6 .0 3,10 .0 5.9 ]十一烷-8,11-二酮单(乙烯酮二硫缩醛)2与氢气在palpalized活性炭上以50 psig的压力反应,导致还原环化,从而得到相应的桥联的二硫代缩酮3。与其他笼型和非笼型1,4-二酮系统进行类似反应的结果表明,需要在反应中心之间保持空间接近,以便通过此过程实现成环。