摘要:
Novel chlorinated phosphorylmethylcarbonyl derivatives of the formula ##STR1## in which R.sup.1 represents an optionally substituted radical from the series comprising alkyl, aryl, aralkyl, alkoxy and aralkoxy andR.sup.2 represents an optionally substituted radical from the series comprising alkoxy and aralkoxy, orR.sup.1 and R.sup.2 together represent an alkanedioxy radical,X represents hydrogen or chlorine andR.sup.3 represents the grouping ##STR2## in which R.sup.4 represents hydrogen or optionally substituted alkyl andR.sup.5 represents optionally substituted alkoxycarbonyl radical or an optionally substituted pyrazolyl radical; orif X represents chlorine, R.sup.3 also may represent optionally substituted radical from the series comprising alkyl, cycloalkyl, alkylamino and cycloalkylamino,which possesses fungicidal activity as well as herbicidal activity, but not against rice. Some intermediates are also new.
摘要:
An improvement in a process for the preparation of the sulphonic acid chloride of the formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are identical or different and denote hydrogen, a lower alkyl or cycloalkyl radical, halogen, nitro, aryl, aralkyl, aryl ether or a radical ##STR2## or wherein adjacent radicals R.sup.1 and R.sup.2 are linked to form a cycloaliphatic or aromatic carbocylic ring which is optionally substituted by a sulphonic acid chloride group by contacting a sulphonic acid of the formula ##STR3## wherein R.sup.1, R.sup.2 and R.sup.3 have the abovementioned meanings, with phosgene in the presence of a N,N-dialkylcarboxylic acid amide catalyst, the improvement wherein the process is carried out in the presence of a sulphonating agent.
摘要:
A process for the preparation of 1-amino-2-ethoxy-naphthalene-6-sulphonic acid from 2-hydroxy-naphthalene-6-sulphonic acid which comprises:A. contacting 2-hydroxy-naphthalene-6-sulphonic acid with at least an equimolar amount of an alkali metal nitrite in aqueous solution or suspension in the presence of hydrochloric acid, solution or suspension having a pH in the range of 2 to 5 and being at a temperature of 0.degree. to 20.degree. C.;B. reducing the reaction product of step A in an aqueous suspension by contacting the same with excess iron in the presence of at least an equivalent amount of iron-II ions, relative to the reaction product obtained according to step A, in the presence of a mineral acid at a temperature from 50.degree. to 120.degree. C., and treating the thus-obtained reaction mixture with aqueous alkali metal hydroxide in the presence of iron oxide;C. contacting the product of step B with excess acetic anhydride in an aqueous solution or suspension at a pH in the range of 3 to 10 at a temperature from 0.degree. to 100.degree. C.;D. contacting the product of step C with an ethylating agent in the presence of an acid binding agent in an aqueous-organic solvent or diluent in a pH range from 8 to 14 at a temperature from 20.degree. to 150.degree. C.; andE. deacetylating the product of step D by contacting the same at reflux with an aqueous alkali metal hydroxide.
摘要:
An improvement in the process for the preparation of an aromatic hydroxy compounds by reacting an aromatic nitroso compound of the formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 independently represent hydrogen, a lower alkyl radical, halogen, a carboxyl or sulfo group or the corresponding alkali metal salt thereof orR.sup.1, R.sup.2 or R.sup.3 individually represent an optionally substituted aromatic ring formed by linking two adjacent radicals,with hydrazine, the improvement residing in reacting the aromatic nitroso compound with the hydrazine in approximately equivalent amounts in an aqueous medium at temperatures from 10.degree. to 50.degree. C., in the absence of a catalyst the aromatic nitroso compound being initially introduced into a reaction chamber and the hydrazine being added thereto.
摘要:
Process for the preparation of a bis-(amino-phenyl)-disulphide of the formula ##STR1## in which R represents hydrogen or halogen,which comprises contacting an amino-thiophenol of the formula ##STR2## or a salt thereof in which R has the abovementioned meaningwith sulphur or a sulphur-donating substance in an aqueous dispersion at a temperature of 10.degree. to 120.degree. C. and a pH value of 3 to 9.
摘要:
An improvement in a process for the preparation of a sulphonic acid chloride of the formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are independently hydrogen, a lower alkyl radical or a cycloalkyl radical, halogen, aryl, aralkyl, aryl ether or a radical --SO.sub.2 Cl, --SO.sub.2 -aryl ##STR2## or wherein adjacent radicals R.sup.1 and R.sup.2 are linked to form a cycloaliphatic, aromatic or hetero-aromatic ring which is optionally substituted by a sulphonic acid chloride group wherein an aromatic compound of the formula ##STR3## wherein R.sup.1, R.sup.2 and R.sup.3 have the above-identified meanings is reacted initially with chlorosulphonic acid and thereafter the reaction product is reacted with phosgene in the presence of a catalyst.