Abstract:
THE DIRECT MONO-ESTERIFICATION OF ARYL MALONIC ACIDS IN THE PRESENCE OF THIONYL CHLORIDE OR THIONYL BROMIDE AND AN N,N-DI(LOWER)-ALKYLFORMAMIDE OR N,N-DI(LOWER9 ALKYLACETAMIDE IN AN ETHER SOLVENT IS DESCRIBED.
Abstract:
A compound of Formula 2 is disclosed wherein R1, MA and MB are as defined in the disclosure. Also disclosed is a method for preparing a compound of Formula 1 wherein R1 and X are as defined in the disclosure comprising contacting a compound of Formula 2 with a halogenating agent. Also disclosed is a method for preparing a compound of Formula 4 wherein R1, R3 and R4 are as defined in the disclosure, comprising reacting a compound of Formula 5 wherein R3 and R4 are as defined in the disclosure with a compound of Formula 1, with a compound of Formula 1, the process of preparing the compound of Formula 4 includes the step of preparing the compound of Formula 1 from the compound of Formula 2 by the method disclosed above. Also disclosed is compound that is methyl 3,5-dichlorobenzeneethanimidate methyl 3,5-dichlorobenzeneethanimidate or ethyl 3,5-dichlorobenzeneethanimidate or salts thereof.
Abstract:
A compound of Formula 2 is disclosed wherein R1, MA and MB are as defined in the disclosure.Also disclosed is a method for preparing a compound of Formula 1 wherein RI and X are as defined in the disclosure comprising contacting a compound of Formula 2 with a halogenating agent.Also disclosed is a method for preparing a compound of Formula 4 wherein R1, R3 and R4 are as defined in the disclosure, comprising reacting a compound of Formula 5 wherein R3 and R4 are as defined in the disclosure with a compound of Formula 1, with a compound of Formula 1, the process of preparing the compound of Formula 4 includes the step of preparing the compound of Formula 1 from the compound of Formula 2 by the method disclosed above.Also disclosed is compound that is methyl 3,5-dichlorobenzeneethanimidate methyl 3,5-dichlorobenzeneethanimidate or ethyl 3,5-dichlorobenzeneethanimidate or salts thereof.
Abstract:
The present invention relates to a novel class of supermolecular carboplatin derivatives represented by general formula (I), wherein B is a polycarboxylic acid represented by general formula (II), wherein R1, R2 and n are defined as in the description. The present invention also relates to a process for preparing the same, pharmaceutical compositions containing the same as active ingredient and the use of the derivatives in the preparation of pharmaceutical compositions which are useful in treating various cellular cancers including hepatoma, stomach cancer, lung cancer and the like. The derivatives have stable cage-like chemical structures and constitutions in solid and in aqueous solution. The derivatives can not only kill cancer cells at a rate significantly higher than that by carboplatin, in particular, in the case of hepatoma cells, at a rate one to two times higher than that by carboplatin, but also produce little side effects such as vomit, baldness, decreases of leucocytes and platelets, and the like, which can be induced by administration of other chemotherapeutics. In the acute toxicity tests on mice, the lethal dose (LD50) of the present derivatives is about 300 mg/kg and 260 mg/kg body weight for a subcutaneous(sc) and an intraperitoneal(ip) administration, respectively. Therefore, the present derivatives are a novel class of cis-platium which can be widely used as anticancer agents.
Abstract:
Compounds are provided having the structure of Formula (I):
or a pharmaceutically acceptable isomer, racemate, hydrate, solvate, isotope, or salt thereof, wherein X1, X2, and R1 are as defined herein. Such compounds function as thyromimetics and have utility for treating diseases such as neurodegenerative disorders and fibrotic diseases. Pharmaceutical compositions containing such compounds are also provided, as are methods of their use and preparation.
Abstract:
Alkyl- and arylmalonic acids of the formula I ##STR1## where R.sup.1 =H, C.sub.1 -C.sub.12 -alkyl, phenyl, C.sub.1 -C.sub.4 -alkylphenyl, C.sub.2 -C.sub.4 -dialkylphenyl, R.sup.2 =C.sub.1 -C.sub.12 -alkyl, phenyl, C.sub.1 -C.sub.4 -alkylphenyl, C.sub.2 -C.sub.4 -dialkylphenyl or R.sup.1 +R.sup.2 =--CH.sub.2 --CH.sub.2 --, are prepared by alkaline saponification by hydrolyzing the corresponding C.sub.1 -C.sub.4 -alkyl esters of the malonic acid of formula I, with alkali metal hydroxide dissolved in an aqueous alkali metal salt solution containing salt at 90-100% of saturation, acidifying the hydrolysis product with a mineral acid, removing the precipitated alkali metal salt which forms upon acidification, and extracting the alkyl- and arylmalonic acid formed from the aqueous solution with the aid of an organic solvent.
Abstract:
An alkylated or alkenylated malonic ester having a fluorine containing aliphatic substituent and derivatives thereof as expressed by the following general formula: ##STR1## where R.sub.f is a fluorine containing aliphatic group, R is an aliphatic group, or hydrogen or alkali metal atom, and R' is an unsubstituted or substituted aliphatic group.And a method to trap the enolate ion of a malonic ester having a fluorine containing aliphatic substituent as expressed by the following general formula,R.sub.f CH(CO.sub.2 R).sub.2where R.sub.f is a fluorine containing aliphatic group and R is an aliphatic group, hydrogen or alkali metal atom, wherein said malonic ester is converted under the action of a weaker base and/or fluoride ion to a fluorine containing enolate ion to be trapped as expressed by the following general formula:R.sub.f C.sup..crclbar. (CO.sub.2 R).sub.2where R.sub.f and R are the same as above.