Synthesis of Octachlorobicyclo[3.3.0]octa-1,4,6-triene and Lewis Acid Catalyzed Isomerization of Hexachlorobicyclo[3.3.0]octa-3,5,8-trien-2-one
作者:Kousuke Kusuda
DOI:10.1246/bcsj.56.481
日期:1983.2
6-diene with powdered selenium, sulfur, phosphorus, or titanium in the presence of anhydrous aluminium chloride without any added solvent at 90–100 °C afforded octachlorobicyclo[3.3.0]octa-1,4,6-triene (2) (e-C8Cl8) in good yield. Hexachlorobicyclo[3.3.0]octa-3,5,8-trien-2-one obtained from 2 was chlorinated by a concentrated solution of antimony(V) chloride in refluxing dichloromethane to give octachlorobicyclo[3
用烯酮羰基二铁 (0) 处理十氯(4-烯丙基环戊烯)得到八氯双环 [3.3.0] 八-1,3,7-三烯(δ-C8Cl8),产率为 40%。在无水氯化铝存在下,在 90–100 °C 下,在不添加任何溶剂的情况下,用粉末状硒、硫、磷或钛对十氯双环 [3.3.0]octa-2,6-二烯进行脱氯,得到八氯双环 [3.3.0]octa -1,4,6-三烯 (2) (e-C8Cl8) 收率良好。由 2 得到的六氯双环 [3.3.0]octa-3,5,8-trien-2-one 用氯化锑 (V) 在回流二氯甲烷中的浓溶液氯化得到八氯双环 [3.3.0]octa-3,6 (或 7)-dien-2-one,但在稀溶液中(少于 0.1 g 氯化锑(V)/cm3 二氯甲烷)六氯双环 [3.3.0]octa-4,6,8-trien-2-获得一 (14) 个。根据环戊二烯基阳离子的反芳香性讨论了异构化的机理。14与甲醇反应得到五氯-4-甲氧基双环[3