Synthesis and Photooxygenation of Linear and Angular Furocoumarin Derivatives as a Hydroxyl Radical Source: Psoralen, Pseudopsoralen, Isopseudopsoralen, and Allopsoralen
carried out through Williamson reaction of hydroxycoumarins with 3‐chloro‐2‐butanone followed by cyclization with polyphosphoric acid or by heating in a strongly alkaline solution. The photooxygenationreactions of synthesized furocoumarins were performed in chloroform and in the presence of tetraphenylporphyrin as singletoxygen sensitizer (1O2). The photooxygenationreactions afforded the photocleaved
通过羟基香豆素与3-氯-2-丁酮的Williamson反应,然后用多磷酸环化或在强碱性溶液中加热,可以合成具有潜在光生物学特征的新型骨架结构的线性和角呋喃香豆素。合成的呋喃香豆素的光氧化反应在氯仿中和在四苯基卟啉作为单线态氧敏剂(1 O 2)存在下进行。光氧合反应通过[2 + 2]环加成反应提供光解产物,通过烯反应和[4 + 2]环加成提供光解产物。分离出光产物并通过光谱分析充分表征。
ADAM, WALDEMAR;HAUER, HERMANN;MOSANDL, THOMAS;SAHA-MOLLER, CHANTU R.;WAGN+, LIEBIGS ANN. CHEM.,(1990) N2, C. 1227-1296