89064-12-0Relevant academic research and scientific papers
On the facile dimerization of precocene II
Fraga, Braulio M.,Cabrera, Inmaculada,Garcia, Victor P.
, p. 2747 - 2752 (2007/10/03)
The AgNO3-silica gel dimerization of precocene II (2) has been restudied in order to identify minor products. The transformation of dimer B (9) into other dimeric compounds has also been examined.
The Dimerization of the Chromene, Precocene II
Fraga, Braulio M.,Garcia, Victor P.,Gonzales, Antonio G.,Hernandez, Melchor G.,Hanson, James R.,Hitchcock, Peter B.
, p. 2687 - 2693 (2007/10/02)
The dimerization of precocene II with different Lewis acids has been studied.Besides C22H32O6 dimeric products, two further dimers, containing a tetrahydrofuran ring, were isolated and their structures established by spectroscopic and X-ray analysis.Since the furans were formed in the presence of SiO2-AgNO3 or SiO2-FeCl3 and not with SiO2-ZnBr2, it is possible that they arise by one-electron-transfer oxidation.
