作者:Rolf Gleiter、Roland Merger、Björn Treptow、Wolfgang Wittwer、Georg Pflästerer
DOI:10.1055/s-1993-25901
日期:——
An improved synthesis of 1,7-cyclododecadiyne 17 (35%), 1,7-cyclotridecadiyne 18 (65%), 1,8-cyclotetradecadiyne 19 (85%), 1,8-cyclopentadecadiyne 20 (65%), 1,9-cyclohexadecadiyne 21 (55%), 1,10-cyclooctadecadiyne 22 (48%) and 1,12-cyclodocosadiyne 23 (27%) is reported. This is achieved by treating the dilithium salts of diterminal dialkynes with α,Ï-dihalogenides. As side products, tetraynes are isolated in yields of 1-5%. Furthermore, the synthesis of 6-isopropylidenethiacyclodeca-3,8-diyne (24) and [10]orthocyclophane-2,8-diyne 29 is reported. The reaction of 24 with CpCo(CO)2 yields a [2.2](2,5) thiophenophane derivative 30 while 29 gives an intramolecular cyclobutadiene complex 31.
报告了一种改进的合成方法,得到了高产率的环状二炔化合物:1,7-环十二二炔17(35%),1,7-环十三二炔18(65%),1,8-环十四二炔19(85%),1,8-环十五二炔20(65%),1,9-环十六二炔21(55%),1,10-环十八二炔22(48%)以及1,12-环二十二二炔23(27%)。该方法通过将末端二炔的双锂盐与α,ω-二卤代物反应实现。副产物四炔以1-5%的产率被分离出来。此外,还报道了6-异亚丙基硫杂环十三-3,8-二炔(24)和[10]正交环辛烷-2,8-二炔29的合成。24与CpCo(CO)2反应生成[2.2](2,5)噻吩环化物30,而29则形成一个分子内的环丁二烯复合物31。