Synthesis of<i>Endo,Endo</i>-2.9-Dihydroxypentacyclo-[8.4.0.0<sup>3,8</sup>.0<sup>4,14</sup>.0<sup>7,11</sup>]Tetradeca-5,12-Diene
作者:Teh-Chang Chou、Gerng-Horng Lin、Sen-Ching Wu、Sushilkumar S. Bahekar
DOI:10.1002/jccs.200800026
日期:2008.2
The title compound 30 was synthesized starting from the endo,syn,endo Diels-Alder adduct 3a of hexahydro-5,6,7,8-tetrachloro-9,9-dimethoxy-5,8-methanonaphthalene-1,4-diol diacetate 6 and 1,2,3,4-tetrachloro-5,5-dimethoxycyclopentadiene (TDCp) in six steps, keyed upon a symmetry-allowed [4+4] photocyclization of decahydro-11,12-dioxo-[1,4;5,8]dimethanoanthracene-9,10-diol diacetate 22. The epimeric
标题化合物 30 由 hexahydro-5,6,7,8-tetrachlor-9,9-dimethoxy-5,8-methannaphthalene-1,4-diol diacetate 的 endo,syn,endo Diels-Alder 加合物 3a 合成6 和 1,2,3,4-四氯-5,5-二甲氧基环戊二烯 (TDCp) 分六个步骤,关键是十氢-11,12-二氧代-[1,4] 的对称允许 [4+4] 光环化; 5,8]dimethanoanthracene-9,10-diol diacetate 22。还合成了与22相关的差向异构单乙酸26,并研究了它们的热解和光解作用。由于跨环反应,二醇 30 的氧化得到六环桥接半缩醛 31。通过单晶X射线晶体学分析半缩醛31的结构。