Nitrene-Carbene-Carbene Rearrangement. Photolysis and Thermolysis of Tetrazolo[5,1-<i>a</i>]phthalazine with Formation of 1-Phthalazinylnitrene, <i>o-</i>Cyanophenylcarbene, and Phenylcyanocarbene
作者:Martin Høj、David Kvaskoff、Curt Wentrup
DOI:10.1021/jo402448u
日期:2014.1.3
spectroscopy (D|hc = 0.5078, E|hc = 0.0236 and D|hc = 0.6488, E|hc = 0.0195 cm–1, respectively). The rearrangement of 12 ⇄ 13 ⇄ 14 constitutes a carbene–carbene rearrangement. 1-Phthalazinylnitrene 310 is observed by means of its UV–vis spectrum in Ar matrix following FVT of 9 above 550 °C. Rearrangement to cyanophenylcarbenes also takes place on FVT of 9 as evidenced by observation of the products of
1-偶氮酞菁9A是由四唑[5,1- a ]酞嗪9T的轻度FVT产生的痕量,通过在Ar矩阵IR光谱中2121 cm –1处的吸收可观察到。的氩矩阵光解9T / 9A在254nm引起开环,以生成(的两种构象异构邻-氰基苯基)重氮甲烷11(2079和2075厘米-1),接着(ø氰基苯基)卡宾3 12,cyanocycloheptatetraene 13,最后通过IR光谱法评价的氰基(苯基)卡宾3 14。两种卡宾3 12通过ESR光谱观察到3和14个(分别为D | hc = 0.5078,E | hc = 0.0236和D | hc = 0.6488,E | hc = 0.0195 cm –1)。的重排12 ⇄ 13 ⇄ 14构成卡宾-卡宾重排。在550°C上方FVT为9时,通过Ar基体中的紫外可见光谱观察到1-Phthalazinylnitrene 3 10。FVT为9时也会发生重排为氰基苯基碳