摘要:
Process and intermediates for the conversion of 3R,4R-4-acetoxy-3-[1R-1-(silyloxy)ethyl]-2-azetidinones to antibacterial 5R,6S-6-(1R-1-hydroxyethyl)-2-(1-oxo-3-thiolanylthio)-2-penem-3-carboxylic acids, and the pharmaceutically-acceptable salts and pivaloyloxymethyl esters thereof.
摘要:
Process and intermediates for the conversion of 3R,4R-4-acetoxy-3-[1R-1-(silyloxy)ethyl]-2-azetidinones to antibacterial 5R,6S-6-(1R-1-hydroxyethyl)-2-(1-oxo-3-thiolanylthio)-2-penem-3-carboxylic acids, and the pharmaceutically-acceptable salts and pivaloyloxymethyl esters thereof.
摘要:
Process and intermediates for the conversion of 3R,4R-4-acetoxy-3-[1R-1-(silyloxy)ethyl]-2-acetidinones to antibacterial 5R,6S-6-(1R-1-hydroxyethyl)-2-(1-oxo-3-thiolanylthio)-2-penem-3-carboxylic acids, and the pharmaceutically-acceptable salts and pivaloyloxymethyl esters thereof.
摘要:
The present invention relates to the compounds 6-[4-(N-methyl-3-azetidinoxy)-5-ethyl-2-methoxy-phenyl]-pyridin-2-ylamine, 6-[4-(N,N-dimethylaminomethyl)-5-ethyl-2-methoxy-phenyl]-pyridin-2-ylamine, 6-[4-(N-methylaminomethyl)-5-ethyl-2-methoxy-phenyl]-pyridin-2-ylamine and 6-[4-(3-azetidinoxy)-5-ethyl-2-methoxy-phenyl]-pyridin-2-ylamine, and the pharmaceutically acceptable salts thereof, to pharmaceutical compositions containing such compounds and to the use of such compounds in the treatment and prevention of central nervous system and other disorders.
摘要:
A process for the preparation of a thieno-imidazole derivative, particularly descarboxybiotin, a useful intermediate for the preparation of d-biotin, which comprises reacting a thio-substituted intermediate, for example descarboxythiobiotin, with an epoxy compound in an alkanol solvent; and a process for the preparation of said intermediate by reacting a substituted imidazothiazole alcohol with anhydrous hydrogen fluoride.
摘要:
A novel process is described for preparation of biotin comprising preparation of substituted 3H, 5H-imidazo[1, 5c]tetrahydro thiazoles by contacting the boron triflouride adduct of an appropriate thiazoline with the metallic derivative of an ester enolate, reducing the ester, hydrolyzing the thiazolidine moiety and hydrolyzing or oxidizing the resultant compound. Intermediates obtained in the preparation of biotin by the above process and alternate procedures for preparing said intermediates are also presented. A novel process for preparation of d-biotin is also given.
摘要:
6-alpha/beta-[(C.sub.1 -C.sub.4)Alkoxyaminomethyl and benzyloxyaminomethyl]penicillanic acid 1,1-dioxides, pharmaceutically acceptable salts thereof and conventional esters thereof hydrolyzable under physiological conditions, all of which are useful in medicine as beta-lactamase inhibitors; intermediates and processes therefor; and a process for the conversion of the present compounds to 6-alpha- and 6-beta-(aminomethyl)penicillanic acid 1,1-dioxides and derivatives.
摘要:
A novel process is described for preparation of biotin comprising preparation of substituted 3H, 5H-imidazo[1, 5c]tetrahydro thiazoles by contacting the boron trifluoride adduct of an appropriate thiazoline with the metallic derivative of an ester enolate, reducing the ester, hydrolyzing the thiazolidine moiety and hydrolyzing or oxidizing the resultant compound. Intermediates obtained in the preparation of biotin by the above process and alternate procedures for preparing said intermediates are also presented. A novel process for preparation of d-biotin is also given.
摘要:
Polypeptides isolated from the venom of the Filistata hibernalis spider block calcium channels in cells of various organisms and are useful in blocking said calcium channels in cells, per se, in the treatment of calcium channel-mediated diseases and conditions and in the control of invertebrate pests.
摘要:
Diastereomeric 5R,6S-6-(1R-hydroxyethyl)-2-(1S-oxo-3R-thiolanylthio)-2-penem-3-carboxylic acid and 5R,6S-6-(1R-hydroxyethyl)-2-(1R-oxo-3S-thiolanylthio)-2-penem-3-carboxylic acid, and pharmaceutically-acceptable salts and in vivo hydrolyzable esters thereof, useful as systemic antibacterial agents; and intermediates and processes which are useful in the said synthesis of said diastereoisomers.