The present first synthesis of 7,7,8,8-tetracyanobicyclo[4.2.1] nona-2,4-diene involves a novel thermal rearrangement of the readily available [3 + 2] cycloadduct of cycloheptatriene-Fe(CO)3 with tetracyanoethylene to 7,7,8,8-tetracyanobicyclo[4.2.1]nona-2,4-diene-Fe(CO)3, followed by oxidative disengagement of the metal fragment with ceric ammonium nitrate. The rearrangement is best effected in polar solvents.
目前对7,7,8,8-四
氰基双环[4.2.1]壬-2,4-二烯的首次合成涉及一种新型热重排反应,即将
环庚三烯-Fe(CO)3与
四氰基乙烯的易得的[3+2]环加成物转化为7,7,8,8-四
氰基双环[4.2.1]壬-2,4-二烯-Fe(CO)3,然后用
硝酸铈铵氧化分离
金属片段。这种重排反应在极性溶剂中效果最佳。