作者:Udo H. Brinker、Alexander A. Bespokoev、Hans Peter Reisenauer、Peter R. Schreiner
DOI:10.1021/jo3001035
日期:2012.4.20
generation of 1 were prepared, followed by photochemical and thermal decomposition as well as flash vacuum pyrolysis (FVP) of a tosyl hydrazone sodium salt precursor, to give a number of rearrangement products. Matrix isolation experiments demonstrate the presence of a diazo intermediate and methyl acetate in all photochemical and thermal precursor reactions. The major product from rearrangements of
双环[3.2.1] oct-6-en-8-亚烷基(1)可以采用“经典”卡宾1a或箔状卡宾1b的构象,其中二价碳向双键弯曲。制备了用于生成1的恶二唑啉前体,然后进行甲苯磺酰and钠盐前体的光化学和热分解以及快速真空热解(FVP),得到了许多重排产物。基质分离实验表明,在所有光化学和热前体反应中均存在重氮中间体和乙酸甲酯。重排“经典”桥联卡宾1a的主要产品是烷基转移的结果是双环[3.3.0]八-1,3-二烯,而二氢半牛戊烯是由1,3-CH插入形成的。相反,到目前为止,未知的应变是通过箔状卡宾1b中的乙烯基转移形成的双环[4.2.0] octa-1,7-二烯。实验结果得到密度泛函理论(DFT),MP2和G4计算的证实。