Synthesis and Photochemistry of 2,2-Dimethyl-3(2H)-thiophenone, a Ketonic Tautomer of 3-Hydroxythiophene. Preliminary Communication
作者:Elke Anklam、Ramin Ghaffari-Tabrizi、Hermann Hombrecher、Sabine Lau、Paul Margaretha
DOI:10.1002/hlca.19840670528
日期:1984.8.8
On irradiation (λ = 366 nm), the 4-thia-2-cyclopentenone 3a behaves in complete analogy to the oxa-enone 3c undergoing regio- and stereospecific cyclodimerization, regiospecific cycloaddition with 2-methylpropene and cycloaddition with 2,3-dimethyl-2-butene to afford cyclobutane derivatives. In contrast, the 4-aza-2-cyclopentenone 3b does not undergo the above-mentioned reactions but only slow photodecomposition
在照射(λ= 366 nm)时,4-thia-2-cyclopentenone 3a的行为完全类似于oxa-enone 3c,其经历区域和立体特异性环二聚,区域特异性环加成与2-甲基丙烯和环加成与2,3-二甲基- 2-丁烯制得环丁烷衍生物。相反,4-氮杂-2-环戊烯酮3b不进行上述反应,而仅进行缓慢的光分解。