Photochemical Reactions. Part 64 [1]. The photochemistry of 3-alkyl-cyclopent-2-en-ones
作者:R. Reinfried、D. Bellu?、K. Schaffner
DOI:10.1002/hlca.19710540602
日期:——
-one (1e) and the bicyclo [3.2.1]octenone 2a only react with the solvent ( 5e–7e, 8–10). The 3-ethyl-(1c) and 3-isopropyl-cyclopent-2-en-ones (1d) afford by dimerisation products 3c, d, 4c and by reaction with the solvent 5c, d, 6c, d, 7d. The β-methoxy-enones 1f and 2b are unreactive under comparable irradiation conditions. The head-to-head cyclobutane dimer 3b (HH) by separate irradiation at < 3400
在甲苯中紫外线照射下,环戊-2-烯一(1a)和3-甲基环戊-2-烯一(1b)进行二聚化(3a,b,4b),而3-叔丁基-环戊-2-烯en-one(1e)和双环[3.2.1]辛烯酮2a仅与溶剂(5e-7e,8-10)反应。3-乙基-(1c)和3-异丙基-环戊-2-烯酮(1d)通过二聚产物3c,d,4c并通过与溶剂5c,d,6c,d,7d反应而提供。β-甲氧基烯酮1f和2b在可比的辐照条件下是无反应的。通过在甲苯中在小于3400Å的单独照射下的头对头环丁烷二聚体3b(HH)被转换为1b。通过类似的照射每个头-尾二聚体3B(抗-和顺- HT),并且也不饱和二聚体4B给出新的未知结构的除了少量单体的异构体1B和相对大量的不溶性物质的。