摘要:
Provided herein are 19-nor C3,3-disubstituted C21-pyrazolyl steroids of Formula (I): and pharmaceutically acceptable salts thereof; wherein , R1, R2, R3a, R3b, R4a, R4b, R5, R6, and R7 are as defined herein. Such compounds are contemplated useful for the prevention and treatment of a variety of CNS-related conditions, for example, treatment of sleep disorders, mood disorders, schizophrenia spectrum disorders, convulsive disorders, disorders of memory and/or cognition, movement disorders, personality disorders, autism spectrum disorders, pain, traumatic brain injury, vascular diseases, substance abuse disorders and/or withdrawal syndromes, and tinnitus.
摘要:
A process is provided for the making of estetrol starting from a 3-A-oxy-estra-1,3,5(10),15-tetraen-17-one, wherein A is an C1-C5 alkyl group, preferably a methyl group, or a C7-C12 benzylic group, preferably a benzyl group. This process is particularly suitable to industry.
摘要:
Novel selective synthesis route to introduce primary alkyl groups on aromatic compounds is disclosed. The synthesis route is based on electrophilic aromatic substitutions of thionium ion species that are generated in-situ from aldehydes and thiols, affording benzyl sulfide that can be reduced with triethylsilane.
摘要:
The present invention provides a method of separating estrogen from placenta, which uses supercritical fluid technique to load the placenta powder of human body or sheep, pig, deer and other animals into an extraction tank. Under the operating conditions of preset pressure and temperature, supercritical solvent is added into the extraction tank to extract estrogen from placenta, so as to acquire de-estrogen placenta powder and placenta extract liquor. Under the same condition, the de-estrogen placenta extract liquor and supercritical solvent are added by a preset volume flow ratio into an adsorption tank. The estrogen in the placenta extract liquor is adsorbed by the adsorption tank to obtain de-estrogen placenta extract. It is then eluted with ethanol solution by gradient proportion to obtain purified natural estrogen.
摘要:
The present invention relates to an improved process for the preparation of Fulvestrant (I). Also, provided is novel intermediate of Fulvestrant and a process for the preparation of the same.
摘要:
The present invention provides a class of fulvestrant ester derivatives and preparation method thereof. Such a compound is an aliphatic ester formed by esterifying the —OH at positions C-3 and C-17 of fulvestrant, having a structure of the following formula: In the formula, substituent R is H, alkanoyl or alkenoyl having 2 to 22 carbon atoms or stereoisomers thereof; substituent R′ can be H, alkanoyl or alkenoyl having 2 to 4 carbon atoms or stereoisomers thereof; such an aliphatic ester compound being used as a pro-drug can improve the stability of a compound, meanwhile the decrease of polarity can enable them to be easily made into preparations like lipid emulsion, microsphere etc., and avoid the degradation of the compound caused by factors like high temperature etc. and the use of an organic solution during preparation process.
摘要:
The present invention discloses compound 2β,3α,5α-trihydroxy-androst-6-one, having the structure of formula (I). The present invention also discloses a plurality of methods for preparing the compound and a use of the compound.
摘要:
A method of preparing fluorine-18 labeled radiopharmaceuticals (18F-radiopharmaceuticals) is disclosed. More particularly, the present invention relates to a method of preparing an 18F-radiopharmaceutical by reacting a salt containing fluorine-18 (18F) with an alkyl halide or an alkyl sulfonate in the presence of water and ethanol to obtain a high yield of the 18F-radiopharmaceutical. The synthetic method eliminates the use of toxic and/or environmentally-unfriendly organic solvents.
摘要:
The present invention relates to a method for synthesizing a radiopharmaceutical using a cartridge, which makes it possible to carry out several steps of reaction required for synthesizing a radiopharmaceutical in the cartridge filled with a polymer. A method for synthesizing a radiopharmaceutical according to the present invention enables each step's reaction to be carried out with the solution confined in the cartridge so as not to flow out, thus being simplified compared to the conventional methods for synthesizing radiopharmaceuticals, and expediting the synthesis thereof.