Photochemical Reactions of Spiro[benzo[<i>b</i>]thiophene-2(3<i>H</i>), 1′-cydopropan]-3-ones
作者:Nobumasa Kamigata、Koichi Hagihara、Satoshi Hashimoto、Hirokazu Iizuka、Michio Kobayashi
DOI:10.1246/bcsj.57.2325
日期:1984.8
The photolysis of spiro[benzo[b]thiophene-2(3H),1′-cyclopropan]-3-one 1,1-dioxide (1) in benzene afforded 2-biphenylyl cyclopropyl ketone with extrusion of sulfur dioxide, whereas the irradiation of 1 in toluene or p-xylene formed photoreduced dimer and bibenzyl or 4,4′-dimethylbibenzyl, respectively. The photolysis of spiro[benzo[b]thiophene-2(3H),1′-cyclopropan]-3-one in benzene afforded the valence isomer 2,3-dihydro[1]benzothieno[3,2-b]furan.
在苯中光解螺[苯并[b]噻吩-2(3H),1′-环丙烷]-3-酮 1,1-二氧化物(1)可得到 2-联苯基环丙基甲酮,并挤出二氧化硫,而在甲苯或对二甲苯中辐照 1 则分别形成光还原二聚物和联苄或 4,4′-二甲基联苄。在苯中对螺[苯并[b]噻吩-2(3H),1′-环丙烷]-3-酮进行光解,可得到价态异构体 2,3-二氢[1]苯并噻吩并[3,2-b]呋喃。