Abstract: A process for the synthesis of fipronil, which is a broad spectrum insecticide of the following chemical structure, is provided. The process provides fipronil with a yield in the range of 75% to 90% and purity in the range of 95% to 97%. By the process, the observed amount of sulfone impurity i.e., 5-amino-1-(2,6-dichloro-4-trifluoromethylphenyl)-3-cyano-4-trifluoro methylsulfonyl pyrazole in fipronil is in the range of 0% to 0.5%.

Abstract: A process for the preparation of trifluoromethanesulfinyl chloride is provided. Trifluoromethanesulfinyl chloride is used as an intermediate for preparing pesticides and insecticides. Trifluoromethanesulfinyl chloride is represented by Formula I: The process for the preparation of trifluoromethanesulfinyl chloride employs readily available reagents and does not involve formation of toxic by-products, and is thus a simple, economic, and environmental-friendly process for the preparation of trifluoromethanesulfinyl chloride.

Abstract: The present disclosure relates to a process for synthesis of mesotrione. The process comprises reacting 4-toluene sulfonyl chloride with alkali metal sulphite and alkali metal bicarbonate to obtain alkali metal toluene-4-sulfinate. The alkali metal toluene-4-sulfinate is reacted with alkali metal salt of monochloroacetic acid to obtain 4-methylsulfonyl toluene. Further, 4-methylsulfonyl toluene is nitrated to obtain 2-nitro-4-methylsulfonyl toluene. 2-nitro-4-methylsulfonyl toluene is oxidized and then halogenated to obtain 2-nitro-4-methylsulfonylbenzoyl halide. 2-nitro-4-methylsulfonylbenzoyl halide is reacted with alkali metal salt of 1,3-cyclohexanedione to obtain 3-(2-Nitro-4-methylsulfonylbenzoyloxy)cyclohexen-1-one which is reacted with base, a third fluid medium and cyanide ion source to obtain an amorphous mesotrione. The present disclosure also discloses the steps of converting the amorphous mesotrione to crystalline mesotrione having purity greater than 99%.

Abstract: In the process of the present disclosure 3,6-dichloro-2-methoxybenzoic acid (DICAMBA) is prepared from 2,5-dichloroaniline in high purity and high yield. DICAMBA is obtained with purity greater than 98.5%.

Abstract: The present disclosure relates to a process for synthesis of mesotrione. The process comprises reacting 4-toluene sulfonyl chloride with alkali metal sulphite and alkali metal bicarbonate to obtain alkali metal toluene-4-sulfinate. The alkali metal toluene-4-sulfinate is reacted with alkali metal salt of monochloroacetic acid to obtain 4-methylsulfonyl toluene. Further, 4-methylsulfonyl toluene is nitrated to obtain 2-nitro-4-methylsulfonyl toluene. 2-nitro-4-methylsulfonyl toluene is oxidized and then halogenated to obtain 2-nitro-4-methylsulfonylbenzoyl halide. 2-nitro-4-methylsulfonylbenzoyl halide is reacted with alkali metal salt of 1,3-cyclohexanedione to obtain 3-(2-Nitro-4-methylsulfonylbenzoyloxy)cyclohexen-1-one which is reacted with base, a third fluid medium and cyanide ion source to obtain an amorphous mesotrione. The present disclosure also discloses the steps of converting the amorphous mesotrione to crystalline mesotrione having purity greater than 99%.

Abstract: The present disclosure relates to Quinacridone pigment and a process of preparation thereof. The Quinacridone pigment of the present disclosure exhibit higher chemical resistance to solvents, higher stability and higher resistance to acid and alkali.

Abstract: The present disclosure relates to Quinacridone pigment and a process of preparation thereof. The Quinacridone pigment of the present disclosure exhibit higher chemical resistance to solvents, higher stability and higher resistance to acid and alkali.

Abstract: In the process of the present disclosure 3,6-dichloro-2-methoxybenzoic acid (DICAMBA) is prepared from 2,5-dichloroaniline in high purity and high yield. DICAMBA is obtained with purity greater than 98.5%.

Abstract: The present disclosure relates to an improved diazotization process for the preparation of 5-amino-3-cyano-1-(2,6-dichloro-4-trifluoromethylphenyl) pyrazole.

Abstract: The present disclosure relates to an improved diazotization process for the preparation of 5-amino-3-cyano-1-(2,6-dichloro-4-trifluoromethylphenyl) pyrazole.

Abstract: The present disclosure provides a polymeric composition resistant to temperatures comprising Poly 2,5rBenzimidazole having intrinsic viscosity (I.V.) between 1.0 and 2.5; and at least one binder having a glass transition temperature less than the glass transition temperature of Poly2,5-Benzimidazole and intrinsic viscosity ranging between 0.2 and 1.5. The present disclosure also provides a process for preparing the polymeric composition resistant to temperatures.

Abstract: The present disclosure related to an economic and environmental safe process for obtaining one or more metals from the red mud slag, bauxite, karst bauxite, lateritic bauxite, clay and the like. The present disclosure also related to a process for obtaining elemental aluminum by electrolyzing AlCl3 in the electrolysis cell.

Abstract: The present disclosure provides a process for the preparation of perfluoroalkyl sulfenyl chloride by reacting a compound of formula [I] with at least one fluoride compound and thiophosgene.

Abstract: The present disclosure relates to a polymer composition comprising a polymer blend of Polyaryl Ether Ketone (PAEK) and Poly(2,5-benzimidazole) characterized with enhanced mechanical and wear resistance properties as compared to commercial polymer blends of Polyaryl Ether Ketone and Polybenzimidazole. The present disclosure also relates to shaped articles derived from the polymer composition of the present disclosure.

Abstract: The present disclosure provides carbazole-dioxazine pigment of Formula I; wherein, R is C1-C8 alkyl group, preferably R is an ethyl group, R1 is a chloro group, and R2 is a —NHC(?O)Ph group. The pigment is synthesized from 3-nitro-N-ethylcarbazole. The first step is nitration of 3-nitro-N-ethylcarbazole to form 3,6-dinitro-N-ethylcarbazole which is reduced to form 3-amino-6-nitro-N-ethylcarbazole. This amino compound is benzoylated to form 3-benzamido-6-nitro-N-ethylcarbazole which is then hydrogenated to form 6-amino-3-benzamido-N-ethylcarbazole. Condensation of 6-amino-3-benzamido-N-ethylcarbazole with chloranil provides an intermediate. Cyclization of the intermediate in the presence of a cyclization reagent provides the compound of Formula-I. The pigment has wavelength of maximum absorption (?max) at 571 nm in dimethylformamide as a solvent.

Abstract: The present disclosure relates to a benzoyl substituted carbazole-dioxazine pigment and its preparation. The process involves benzoylation of 3-nitro-N-ethylcarbazole in monochlorobenzene using benzoylchloride and ferric chloride to yield 3-nitro-6-benzoyl-N-ethyl carbazole, which on catalytic hydrogenation and subsequent condensation with chloranil and cyclization yields benzoyl substituted carbazole-dioxazine pigment.

Abstract: The present disclosure provides carbazole-dioxazine pigment of Formula I; wherein, R is C1-C8 alkyl group, preferably R is an ethyl group, R1 is a chloro group, and R2 is a —NHC(?O)Ph group. The pigment is synthesized from 3-nitro-N-ethylcarbazole. The first step is nitration of 3-nitro-N-ethylcarbazole to form 3,6-dinitro-N-ethylcarbazole which is reduced to form 3-amino-6-nitro-N-ethylcarbazole. This amino compound is benzoylated to form 3-benzamido-6-nitro-N-ethylcarbazole which is then hydrogenated to form 6-amino-3-benzamido-N-ethylcarbazole. Condensation of 6-amino-3-benzamido-N-ethylcarbazole with chlroanil provides an intermediate. Cyclization of the intermediate in the presence of a cyclization reagent provides the compound of Formula-I. The pigment has wavelength of maximum absorption (?m) at 571 nm in dimethylformamide as a solvent.

Abstract: The present disclosure provides a process for preparing 2,3-dicyanopropionic acid ester of formula (I); said process comprising the following steps: i) treating an alkali metal cyanide dissolved in a solvent with a solution of 2-cyano-2-propenoic acid ester of formula (II) at a temperature ranging between 0° C. and 50° C. for a time period ranging between 2 hours and 15 hours followed by cooling below 20° C. to obtain a sodium salt of 2,3-dicyanopropionic acid ester of formula (I); and ii) neutralizing the sodium salt of 2,3-dicyanopropionic acid ester using a neutralizing agent to obtain a 2,3-dicyanopropionic acid ester of formula (I).

Abstract: The present disclosure relates to a benzoyl substituted carbazole-dioxazine pigment and its preparation. The process involves benzoylation of 3-nitro-N-ethylcarbazole in monochlorobenzene using benzoylchloride and ferric chloride to yield 3-nitro-6-benzoyl-N-ethyl carbazole, which on catalytic hydrogenation and subsequent condensation with chloranil and cyclisation yields benzoyl substituted carbazole-dioxazine pigment.

Abstract: The present invention provides novel crystalline polymorphic forms of fipronil and processes for preparing the same. The present invention also provides a pesticidal composition containing a pesticidally effective amount of a crystalline form of fipronil and a method for controlling pests using a pesticidally effective amount of a crystalline form of fipronil or its composition.