3,3,4-Trimethyl-4-penten-2-one has been synthesized by the acylation of 2,3-dimethyl-2-butene with acetic anhydride in the presence of soild-supported H3PO4.By comparison of the acylation reactions of 2,3-dimethyl-2-b...3,3,4-Trimethyl-4-penten-2-one has been synthesized by the acylation of 2,3-dimethyl-2-butene with acetic anhydride in the presence of soild-supported H3PO4.By comparison of the acylation reactions of 2,3-dimethyl-2-butene with acetic anhydride over various soilds-supported H3PO4,it was found that K10 clay,silicagel,HY zeolite and HMordenite were good supports.The results obtined indicate that the soild-supported small amounts of H3PO4 possessed higher catalytic activities,For obatining a higher yield of 3,3,4-trimethyl-4-penten-2-one different supports required different modification methods.展开更多
Melamine and poly vinylpyrrolidone （PVP） reacted with neat sulfuric acid readily to form two new organic solid acids namely melamine-（H2SO4）3 and PVP-（H2SO4）n. These solid acids were used for the first nitration...Melamine and poly vinylpyrrolidone （PVP） reacted with neat sulfuric acid readily to form two new organic solid acids namely melamine-（H2SO4）3 and PVP-（H2SO4）n. These solid acids were used for the first nitration of bisphenol A as well as other phenols in the presence of NHaNO3. Mono- and di-nitro bisphenol A have been characterized with IR and ^1H NMR techniques.展开更多
文摘3,3,4-Trimethyl-4-penten-2-one has been synthesized by the acylation of 2,3-dimethyl-2-butene with acetic anhydride in the presence of soild-supported H3PO4.By comparison of the acylation reactions of 2,3-dimethyl-2-butene with acetic anhydride over various soilds-supported H3PO4,it was found that K10 clay,silicagel,HY zeolite and HMordenite were good supports.The results obtined indicate that the soild-supported small amounts of H3PO4 possessed higher catalytic activities,For obatining a higher yield of 3,3,4-trimethyl-4-penten-2-one different supports required different modification methods.
基金financial support for this work from the research affairs of Hamedan University of Medical Sciences, Hamedan,I.R.Iran and partial support of this work by the Research Affairs Office of Bu-Ali Sina University(Grant number 32-1716 entitled development of chemical methods,reagent and molecules.) Hamedan,I.R.Iran
文摘Melamine and poly vinylpyrrolidone （PVP） reacted with neat sulfuric acid readily to form two new organic solid acids namely melamine-（H2SO4）3 and PVP-（H2SO4）n. These solid acids were used for the first nitration of bisphenol A as well as other phenols in the presence of NHaNO3. Mono- and di-nitro bisphenol A have been characterized with IR and ^1H NMR techniques.
