作者:K. Ogura、T. Matsuura
DOI:10.1016/s0040-4020(01)97841-x
日期:1970.1
Irridiation of 2,4,6-tri-t-butyl-3-methoxy-2,5-cyclohexadienone (III) in benzene afforded 3,6-di-t-butylguaiacol (II) and a benzocyclobutene (V) in high yields. The ratio of II to V depends on the wavelength of the incident light and decreases on irradiation with light of shorter wavelengths. Furthermorre, V was formed the faster in the order of the wavelengths of the incidents light: 361 ± 7, 325
2,4,6-三叔丁基-3-甲氧基-2,5-环己二酮在苯中的铱化反应可高收率得到3,6-二叔丁基愈创木酚(II)和苯并环丁烯(V) 。II与V之比取决于入射光的波长,并且在用较短波长的光照射时减小。更进一步地,按照入射光的波长顺序更快地形成了V:361±7、325±7和289±mμ。这些事实表明,III的m,π *激发主要负责II的形成,而π,π *激发主要负责V的形成。讨论了这些现象的可能解释。