摘要:
Novel methods for the synthesis of substituted ureas and guanidines including Terazosin, Prazosin, Doxazosin, Tiodazosin, Trimazosin, Quinasin and Bunazosin (exemplary of 2-amino substituted Quinazolines), Meobentine and Bethanidine and novel intermediates suitable for use in such methods of synthesis are taught.
摘要:
Novel methods for the synthesis of substituted ureas and guanidines including Terazosin, Prazosin, Doxazosin, Tiodazosin, Trimazosin, Quinasin and Bunazosin (exemplary of 2-amino substituted Quinazolines), Meobentine and Bethanidine and novel intermediates suitable for use in such methods of synthesis are taught.
摘要:
Novel methods for the synthesis of substituted ureas and guanidines including Terazosin, Prazosin, Doxazosin, Tiodazosin, Trimazosin, Quinasin and Bunazosin (exemplary of 2-amino substituted Quinazolines), Meobentine and Bethanidine and novel intermediates suitable for use in such methods of synthesis are taught.
摘要:
A process from preparing 5-halogenated 2,3-O-cyclocytidine derivatives comprising reacting 2,3-O-cyclocytidine with a halogenating reagent, preferably N-bromosuccinimide, in the presence of an acid such as acetic or trifluoroacetic.
摘要:
A 5'-halo-2,3'-O-cyclocytidine of Formula I: ##STR1## wherein: X is a bromide, chloride, or iodide;Y is halide, sulfate, acetate, tosyl, mesyl, benzoate, and phosphate;R.sup.1 is hydrogen; andR.sup.2 is a hydroxy protecting group.Pharmaceutical compositions containing the above compounds exhibit antineoplastic activity.
摘要:
Process for the production of an improved form of Form 1 Ranitidine Hydrochloride having improved filtration and drying characteristics, said process comprising in a substantially anhydrous hydroxylic solvent, comprising at least one alkanol solvent having 3-4 carbon atoms, adding anhydrous hydrogen chloride gas to Ranitidine free base wherein said substantially anhydrous hydroxylic solvent has the characteristics that it solubilizes the Ranitidine free base and hydrogen chloride gas, and subsequently recovering the improved form of Form 1 Ranitidine Hydrochloride.
摘要:
Process for the production of an improved form of Form 1 Ranitidine Hydrochloride having improved filtration and drying characteristics, said process comprising in a substantially anhydrous hydroxylic solvent, comprising at least one alkanol solvent having 3-4 carbon atoms, adding anhydrous hydrogen chloride gas to Ranitidine free base wherein said substantially anhydrous hydroxylic solvent has the characteristics that it solubilizes the Ranitidine free base and hydrogen chloride gas, and subsequently recovering the improved form of Form 1 Ranitidine Hydrochloride.
摘要:
The present invention relates to a new and useful amorphous form of ziprasidone hydrochloride (5-[2-[4-(1,2-benzisothiazol-3-yl)-1-piperazinyl]ethyl]-6-chloro-1,3-dihydro-2H-indol-2-one hydrochloride) and preparations thereof.