Selective pyrolysis of bifunctional compounds: gas-phase elimination of carbonate–ester functionalities
作者:Talal F. Al-Azemi、Hicham H. Dib、Nouria A. Al-Awadi、Osman M.E. El-Dusouqui
DOI:10.1016/j.tet.2008.01.002
日期:2008.4
Compounds containing both carbonate and ester functionalities were synthesized and then subjected to online-GC gas-phasepyrolysis. The carbonate groups were cleaved selectively in all elimination reactions. The end products of the reaction were found to be affected by the nature of the substrate. The presence of hydrogen and carbonyl substituents on the carbon β to the carbonate group resulted in
Three component mobility controlling vinylic rotaxane crosslinkers with two radically polymerizable vinyl groups (RC_Rs) were synthesized to prove that the mobility of the components of the RC_Rs plays a crucial role in determining the properties of rotaxane‐crosslinked polymers (RCPs). RC_Rs (R=H, Me, or Et) were obtained from living ring‐opening polymerization. RCP_Et was prepared using RC_Et, which exhibits
An activated carbon comprising a carbonized and activated compound represented by the formula (1):
(wherein, R represents a hydrocarbon group having 1 to 12 carbon atoms, said hydrocarbon group may be optionally substituted with hydroxyl group, alkyl group, alkoxy group, aryl group, aryloxy group, sulfonyl group, halogen atoms, nitro group, thioalkyl group, cyano group, carboxyl group, amino group or amide group, R′ represents hydrogen atom or methyl group, and n represents an integer of 4, 6, or 8).
Modified succinimides for use in lubricating oils and hydrocarbon fuels
申请人:CHEVRON RESEARCH AND TECHNOLOGY COMPANY
公开号:EP0169715A2
公开(公告)日:1986-01-29
Additives useful as dispersants and/or detergents in lubricating oils, gasolines, marine crankcase oils and hydraulic oils are polyamino alkenyl or alkyl succinimides which have been modified to contain carbamate functionalities by converting one or more of the amino nitrogens to a hydrocarbyl carbamate, hydroxyhydrocarbyl carbamate or hydroxy poly(oxyalkylene) carbamate group. These additives can be prepared by reacting a polyamino alkenyl or alkyl succinimide with a cyclic carbonate, or a linear mono-or poly-carbonate, or a chloroformate.
Additive for lubricating oils and hydrocarbon fuels
申请人:CHEVRON RESEARCH AND TECHNOLOGY COMPANY
公开号:EP0172733A2
公开(公告)日:1986-02-26
Additives useful as dispersants and/or detergents in lubricating oils, gasolines, marine crankcase oils and hydraulic oils are alkenyl or alkyl succinimides which have been modified by treatment with a polyamine-cyclic carbonate adduct. The additives are the reaction products obtainable by first (a) reacting a polyamine with a cyclic carbonate and thereafter (b) reacting the product of step (a) with an alkenyl or alkyl succinic anhydride.