甲氰菊酯的合成

:由异丙基氯通过格氏反应、硫酸催化脱水制备了四甲基丁烯 ,进而与二氯乙酰氯反应合成了氯代四甲基环丁酮 ;它可以水解生成四甲基环丙烷羧酸。由四甲基环丙烷羧酸或氯代四甲基环丁酮合成了甲氰菊酯。     

Formation of tetramethylethylene radical cations after pentane adsorption on sulfated zirconia

Tetramethylethylene radical cations have been registered by ESR after pentane adsorption on sulfated zirconia. The radical cations proved to be not stable in the presence of oxygen, only molecular oxygen radical anions being registered. Tetramethylethylene formation and pentane disproportionation are shown to occur under illumination within the same spectral region proving that the former is formed as a by-product of pentane transformations.     

Activation of PAH by Ozone Derived Oxidants [1,2]

Treatment of four PAH adsorbed on silica gel with a gas stream containing ozone and 2,3-dimethyl-2-butene leads to the formation of the K-region oxide in each case. A similar treatment using ozone alone did not give oxide formation. The oxide formation is thus due to one or more oxidants derived from the ozone-alkene reaction. We suggest that acetone oxide or dimethyldioxirane are good candidates for these oxidants. The results suggest that oxidants derived in this manner may be partially responsible for the observed production of mutagens and carcinogens in polluted atmospheres containing ozone, alkenes and particulate-adsorbed PAH.