The reaction of biphenyl-alkynes with in situ generated Tf2C=CH2 followed by neutralization gave polycyclicaromatichydrocarbons (PAHs) decorated by a highly stabilized carbanionic functionality. Thus obtained PAHs showed improved solubility in both aqueous and organic solvents.
的反应联苯炔烃与原位产生的TF 2 C = CH 2,然后中和,得到由高度稳定的负碳离子的功能的装饰多环芳香烃(PAHs)。由此获得的多环芳烃在水性和有机溶剂中均显示出改善的溶解度。
Lewis Acid Promoted Reactions of Ethenetricarboxylates with Allenes: Synthesis of Indenes and γ-Lactones via Conjugate Addition/Cyclization Reaction
Indenes are important core structures in organic chemistry. Few simple arylallenes have been used to construct indene skeletons by Friedel Crafts reaction. Lewis acid catalyzed reaction of ethenetricarboxylates 1 and arylallenes has been examined in this study. The reaction of arylallenes and ethenetricarboxylate triesters with SnCl4 gave indene derivatives efficiently, via a conjugate addition/Friedel-Crafts cyclization reaction. On the other hand, the reactions of 1,1-diethyl 2-hydrogen ethenetricarboxylate and arylallenes or alkylallenes with SnCl4 at -78 degrees C or room temperature and subsequent treatment with Et3N gave gamma-lactones. The reactions of triethyl ethenetricarboxylate and 1,1-dialkylallenes with SnCl4 at room temperature also gave gamma-lactones.