Synthesis of 5-<i>tert</i>-butyl-8,12,14-trimethyl- and 5-<i>tert-</i>butyl-8,12,14,16-tetramethyl[2.2]metacyclophane and their treatment with Lewis acids in benzene
作者:Tomoe Shimizu、Katsuhiko Hida、Takehiko Yamato
DOI:10.3184/030823409x465222
日期:2009.7
trans-tert-butylation to afford 8,12,14,16-tetramethyl[2.2]MCP in good yield along with tert-butylbenzene. On the other hand, the same treatment of 5-tert-butyl-8,12,14-trimethyl[2.2]MCP led to transannular cyclisation reaction and isomerisation reaction to afford the corresponding strainless 2-tert-butyl-3a,6,8-trimethyl-3,3a,4,5,9,10-hexahydropyrene in good yield.
在苯中用 AlCl3-MeNO2 处理 5-叔丁基-8,12,14,16-四甲基 [2.2]MCP 导致叔丁基转移,得到 8,12,14,16-四甲基 [2.2]MCP与叔丁基苯一起收率良好。另一方面,5-叔丁基-8,12,14-三甲基[2.2]MCP的相同处理导致环环化反应和异构化反应,得到相应的无应变的2-叔丁基-3a,6,8 -三甲基-3,3a,4,5,9,10-六氢芘收率良好。