Synthesis and rearrangement of dispiro[2.0.3.4]-, dispiro-[3.0.3.3]- and dispiro[2.1.3.3]undecanes - preferred C4-C5 over C3-C4 and C4-C3 over C5-C6 rearrangements
作者:Lutz Fitjer、Beate Rissom、Andreas Kanschik、Ernst Egert
DOI:10.1016/s0040-4020(01)85700-8
日期:1994.1
10–12 have been synthesized and rearranged by treatment with acids. With 10, an initial C3-C4 ring enlargement leads to [3.3.3]propellane 21, with 11, an initial C4-C3 ring contraction leads to pentalene 37, and with 12, an initial C4-C5 ring enlargement leads to 42, 43, 44 or 45, depending on the reagent used. The structure of 43 has been determined by crystal structure analysis of the 3,5-dinitrobenzoate
双螺环烷10 – 12已通过酸处理合成并重排。对于10,初始C 3 -C 4环扩大导致[3.3.3]丙炔21,对于11,初始C 4 -C 3环收缩导致戊烯37,而对于12,初始C 4 -C 5取决于所使用的试剂,环扩大会导致42、43、44或45。的结构43已经由3,5-二硝基苯甲酸酯的晶体结构分析来确定从中衍生出46种。将10点重排成二螺环烷47作为(±)-苯二酚48的潜在前体。