作者:Benan Kilbas、Akin Azizoglu、Metin Balci
DOI:10.1002/hlca.200690145
日期:2006.7
6-trimethylbicyclo[3.1.1]hept-2-ene (11) were synthesized by reacting 2,6,6-trimethylbicyclo[3.1.1]heptan-3-one (9) with hydrazine, followed by treatment with I2 in the presence of Et3N. Treatment of 11 with t-BuOK as base in diglyme at 220° resulted in the formation of 9 and 6,6-dimethyl-4-methylidenebicyclo[3.1.1]hept-2-ene (12). For the formation of 9, the cyclic allene 7 is proposed as an intermediate. Treatment
两种双键异构体3-iodo-2,6,6-trimethylbicyclo [3.1.1] hept-2-ene(6b)和3-iodo-4,6,6-trimethylbicyclo [3.1.1] hept-2烯(11)由2,6,6-三甲基反应合成[3.1.1]庚烷-3-酮(9)与肼,随后用我2的Et的存在3 N.治疗11与在220°的二甘醇二甲醚中,以t- BuOK为碱,形成9和6,6-二甲基-4-亚甲基双环[3.1.1]庚-2-烯(12)。为了形成9,提出了环状丙二烯7作为中间体。第二种异构体6b的处理用170℃的t- BuOK,生成二烯12和二聚产物17。讨论了这种转换的潜在机制。基于对丙二烯7和炔烃15的密度泛函理论(DFT)计算,排除了后者作为中间体的形成。