On the mechanism of the photochemical reaction between 1,4-dicyanobenzene and 2,3-dimethylbutene in the presence of nucleophiles
作者:Rosangela Torriani、Mariella Mella、Elisa Fasani、Angelo Albini
DOI:10.1016/s0040-4020(96)01146-5
日期:1997.2
allylation of the aromatic. In the presence of nucleophiles (MeOH, H2O, CF3CH2OH) this reaction is substituted by the nucleophile olefin combination - aromatic substitution (NOCAS) process. The quantum yield increases from 0.006 in the absence to a limiting value of ca 0.02 in the presence of the nucleophiles. The reaction involves competing deprotonation and nucleophile addition to the olefin radical cation
在2,3-二甲基-2-丁烯(DMB)存在下辐射1,4-二氰基苯(DCB)会导致芳族化合物的烯丙基化。在亲核试剂(MeOH,H 2 O,CF 3 CH 2 OH)的存在下,该反应被亲核烯烃组合-芳香族取代(NOCAS)工艺取代。量子产率从不存在亲核试剂时的0.006增加到存在亲核试剂存在时的0.02的极限值。该反应涉及竞争去质子化和亲核试剂除了烯烃自由基阳离子,接着将这样形成的自由基与DCB的联接- 。较小的过程是烯丙基从溶剂中提取氢,这是通过分离苯基戊腈3揭示的。少量的环己二烯6揭示了分离前自由基离子的键合和耦合。