摘要:
Diphenyl-2-carboxaldehyde derivatives, prepared by reacting a diphenylamine-2-carboxylic acid benzenesulfonylhydrazide with a base and hydrazine, semicarbazide, thiosemicarbazide or phenylhydrazine, are reacted with a mineral acid to produce acridines. The acridines are useful as intermediates for preparing 9-aminoalkylacridans having pharmacodynamic activity.
IN WHICH N IS 0, 1 OR 2, EACH X is halogen, lower alkyl or lower alkoxy, R is lower alkyl, R'' is hydrogen or lower alkyl, R'''' is hydrogen; alkyl optionally substituted by at least one of halogen, nitrile, lower alkoxy, lower alkylmercapto, lower alkoxycarbonyl, phenoxy, halogenophenoxy, alkylphenoxy, alkoxyphenoxy and arylmercapto; cycloalkyl; aralkyl optionally substituted by halogen, lower alkyl or lower alkoxy; aryl optionally substituted by halogen, lower alkyl or lower alkoxy; or a five- or six-membered heterocyclic radical containing at least one oxygen, sulfur or nitrogen heteroatom, and R'''''' is alkyl; cycloalkyl; alkenyl; or aralkyl optionally substituted in the aryl moiety by at least one of lower alkyl, lower alkoxy and halogen, WHICH POSSESS FUNGICIDAL PROPERTIES.
摘要:
To produce thiosemicarbazide hydrazine is reacted with hydrogen cyanide and sulfur to form hydrazine thiocyanate, and this is then converted into the thiosemicarbazide at an elevated temperature. Advantageously, the reaction is carried out in a polar solvent.
INCLUDING CUPROUS, CUPRIC, FERROUS, ZINC COBALTOUS AND AURIC CHELATES, ALKALI METAL AND ACID ADDITION SALTS. THE COMPOUNDS HAVE ANTI-TUMOR, ANTI-FUNGAL, AND ANTI-PARASITIC ACTIVITY AS WELL AS PRODUCE SYMTOMS OF VITAMIN B-COMPLEX DEFICIENCES.
WHEREIN R1 IS A METHYL OR ETHYL GROUP, R2 IS A HYDROGEN ATOM OR A METHYL GROUP, AND R3 AND R4 ARE DIFFERENT, EACH BEING A HYDROGEN ATOM, A METHYL OR AN ETHYL GROUP.
摘要:
A process for the production of a lower alkyl-thiosemicarbazide comprising steam distilling an aqueous solution containing hydrazine and an N-lower alkyl-dithiocarbamic acid quaternary ammonium salt thereby to effect pyrolysis while distilling off water, lower alkyl amine and hydrogen sulfide, and cooling the distilland to form crystals of the lower alkylthiosemicarbazide. Advantageously the solution is obtained by reacting carbon disulfide and methylamine in water, followed by addition of hydrazine.
摘要:
A process for preparing an alkylthiosemicarbazide of the formula ##STR1## wherein R represents an alkyl group having up to 4 carbon atomsby contacting a dialkylthiouram disulfide of the formula ##STR2## wherein R represents an alkyl group having up to 4 carbon atomswith hydrazine in an aqueous medium.
摘要:
1-TERT.-BUTYL-THIOSEMICARBAZIDE COMPOUNDS OF THE FORMULA
wherein R and R'' are hydrogen, aliphatic, cycloaliphatic or aromatic hydrocarbyl (optionally substituted) or where an R and R'' together with the nitrogen linking them can form a heterocyclic system ARE PRODUCED BY REACTING A THIOSEMICARBAZIDE OF THE FORMULA
with tertiary butanol in the presence of a dehydrating agent at a temperature of from 0* to 100*C.