69795-73-9Relevant academic research and scientific papers
Quantitative Synthesis and Formation of Cyclopentapyrene 3,4-Oxide under Simulated Atmospheric Conditions
Murray, Robert W.,Singh, Megh
, p. 239 - 243 (2007/10/03)
Cyclopentapyrene 3,4-oxide (2) has been synthesized in a one-step, quantitative reaction using dimethyldioxirane. The oxide, or its thermal rearrangement products cyclopentapyren-3(4H)-one and cyclopentapyren-4(3H)-one, is formed from cyclopentapyrene (1) under simulated environmental conditions. In one case these products are formed when 1 is adsorbed on model particulates and then exposed to the reaction products of tetramethylethylene and ozone in the gas phase.
Convenient synthesis of cyclopentapyrene and 3,4-dihydrocyclopentapyrene. The reactivity of the pyrene dianion
Tintel, C.,Cornelisse, J.,Lugtenburg, J.
, p. 14 - 20 (2007/10/02)
The reactivity of the pyrene dianion has been investigated.Initial attack by electrophiles on the pyrene dianion has been shown to take place exclusively at the 4(9)-position, leading to monoanions (11,15) which can be converted into 9-substituted 1,9-dihydropyrene derivatives (12,16).The latter can be rearranged to give the novel 4-substituted 4,5-dihydropyrene derivatives (13,17), which provide access to 4-substituted pyrene derivatives (14,5).Cyclopentapyrene (1) and 3,4-dihydrocyclopentapyrene (2), two widespread environmental contaminants, have been synthesizedfrom pyrene in four (64percent) and in five (62percent), respectiveliy, utilizing the chemical properties of the pyrene dianion.In these easy and straightforward syntheses the thus far unknown 4,5-dihydro-4-pyreneacetic acid (17) plays a major role.
