摘要:
The invention relates to new 2-ketosulfonamides of the formula ##STR1## and to a process for their preparation, wherein the reaction mixtures obtained by reacting enamines of the formula ##STR2## with sulfamoyl halides of the formula ##STR3## are hydrolyzed to the 2-ketosulfonamides.
摘要:
4-Sulphonamidosalicylaldehydes of the formula ##STR1## wherein R represents an optionally substituted straight-chain or branched alkyl or cycloalkyl group or an optionally substituted aryl group, are valuable intermediates for the preparation of optical brighteners.
摘要:
Novel compounds for inhibiting the premature vulcanization of vulcanizable rubber formulations comprising bis-(sulfonamido)-sulfides or polysulfides having the formula: ##STR1## where R and R' are independently selected from the group consisting of aryl, alkyl, cycloalkyl or substituted derivatives thereof and x is an integer of from 1 to 3. These novel compounds may be exemplified by bis-(N-methyl-p-toluenesulfonamido)-disulfide.
摘要:
Novel 1-hydroxyaryl-2-amidoalkylaminoethanol derivatives, processes for their manufacture, pharmaceutical compositions containing them and methods of using them in the treatment of heart failure and other diseases. The compounds possess .beta.-adrenergic stimulant activity. Representative of the compounds disclosed is 1-p-hydroxyphenyl-2-(.beta.-isobutyramidoethyl)aminoethanol.
摘要:
An N-(perfluoroalkyl-sulphonyl)-carbamic acid ester of a polyalkylene oxide of the formula:
in which: RF is a perfluoroalkyl radical of up to 20 carbon atoms, R1 is hydrogen, alkyl, hydroxyalkyl, cycloalkyl, alkenyl, aralkyl, or
R2 is a polyoxyalkylene radical, and R3 is alkyl of up to 8 carbon atoms, alkenyl, aralkyl or
The compounds are produced by reacting a perfluoroalkylsulphonamide with a chloroformic acid ester of a polyalkylene oxide in the presence of an acid binding agent. The products are useful as surfactants in making polyurethane foams.
摘要:
A 4-acyl-o-phenylenediamine is selectively sulfonated on the amino group meta to the acyl group to provide an important intermediate for benzimidazole pharmaceuticals. Some of the intermediates are new to organic chemistry.
摘要:
A process is provided which produces 3-sulfonylamino-4-aminobenzophenone intermediates useful in the regiospecific synthesis of benzimidazole antiviral agents.
摘要:
There is provided a process for preparing amides which comprises reacting an amine, or an amide, and an acid halide, or anhydride, in suitable molecular proportions, in an inert organic diluent, in the presence of an effective amount of a molecular sieve, until the reaction is completed, separating the molecular sieve, and recovering the amide from the organic mother liquor.
摘要:
A process for preparing polybenzimidazoles is disclosed in which aromatic bis-orthoaminosulfonamides and aromatic dicarboxylic acids or derivatives thereof are polymerized in polyphosphoric acid. The process provides thermally stable heterocyclic polymers of very high molecular weight that are especially useful in forming films and fibers.