摘要:
Phosphorus compounds having at least one chlorine, bromine or iodine bonded directly to phosphorus are transhalogenated with fluorine by reaction with a fluoride salt, e.g., KF or ammonium fluoride, in an inert solvent in the presence of a catalytic amount of a carboxylic acid.
摘要:
Phosphorus compounds having at least one chlorine, bromine or iodine bonded directly to phosphorus are transhalogenated with fluorine by reaction with a fluoride salt, e.g., KF or ammonium fluoride, in the presence of a hydrogen halide salt of a pyridine-type nitrogen base, e.g., pyridine hydrochloride.
摘要:
Substituted phenylacetic acid amide compounds, and pharmaceutically-acceptable salts thereof, of the formula: wherein X is O or S; R1 is H, OH or CH3; R2 is straight chain alkenyl, branched chain or cyclic hydrocarbon having from about 7 to about 24 carbon atoms; R3 is OH, OSO3-, OPO3 or a short chain ester with from about 1 to about 6 carbon atoms.
摘要:
A compound of formula in which X 1 is a reactive group that can react to form a covalent bond with a reactive group on the surface of a material to be rendered biocompatible, X 2 is a group -O e or a precursor of such a group, n is 2, 3 or 4, Y is a group -*NR 3 A e wherein each R, which may be the same or different, is a C 1 -C 4 alkyl group and A e is an anion present when X 2 is an electrically neutral group or Y is wherein R 1 together with X 2 forms a direct bond between the nitrogen and the phosphorus atoms.
摘要:
The present invention relates to an electrolyte for a lithium secondary battery and a lithium secondary battery including the same. The electrolyte for a lithium secondary battery and the lithium secondary battery including the same according to the present invention exhibit flame retardancy, and thus have the advantage of being able to provide excellent reliability. The lithium secondary battery exhibits high output performance and has excellent cycle life characteristics, high-temperature stability, and high-temperature voltage preservation stability, and thus has the advantage of high battery reliability.
摘要:
A process for preparation of phosphoric esters which comprises step (1) of reacting phosphorus oxychloride with naphthol at a molar ratio of not larger than 1/1.3 in the presence of a metal halide and removing unreacted phosphorus oxychloride and step (2) of reacting the reaction product of step (1) with phenol at a molar ratio (of chlorine contained in the reaction product to phenol) ranging from 1 : 1 to 1 : 1.5 and removing hydrogen chloride formed by a by-product to thereby obtain a phosphoric ester represented by the general formula (I): (1) wherein n is 1 or 2.