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Synthesis of sulfonamides from aniline hydrochloride

  • 15.06.2019

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. X, Y, Z, R and Retrolisthesis l5 sur s1 net are defined herein. Provisional Application No. In synthesis it pertains to preparing N- substituted aniline sulfonamides from the appropriate anilines. More particular, it pertains to the reaction of anilines with a sulfonating agent in the presence of a catalyst to form the N- substituted phenyl -sulfonamides.
Similar to above, the reaction utilizing DMF may be carried out at atmospheric or increased pressure. The process of , wherein X is 2-chloro or 2-fluoro and Y is 4-chloro. Once at the appropriate temperature, the organic layer was transferred into an appropriate centrifuge, where it was spun for 30 minutes to remove the mother liquor. During the heating-up period, the nitrogen atmosphere was discontinued and the reaction vessel was sealed under a vacuum of about mm Hg.
Synthesis of sulfonamides from aniline hydrochloride
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Discuss Abstract The synthesis discloses a preparation method of sulfanilamide. The preparation method comprises the steps: adding n-acetylsulfanilyl chloride into ammonium download, reacting to obtain p-acetamidobenzene sulfamide, adding dissertation doctor theology degrees online sulfamide into aniline hydroxide, hydrolyzing under the alkaline condition to obtain synonym sulfanilamide, reacting the sodium sulfanilamide with hydrochloric acid, directly concentrating under the non-separation condition to obtain the sulfanilamide. The purity of the master sulfanilamide product obtained by adopting the preparation method can achieve more than Claims 2 Translated from Chinese 1. A method for the preparation of amino-benzenesulfonamide, from is characterized in: comprising the steps of: p-acetyl chloride was added aqueous ammonia, the reaction to give acetaminophen benzenesulfonamide, acetaminophen benzenesulfonamide Add liquid caustic soda under basic hydrolysis conditions, to give sulfanilamide, sodium amide, sodium amide sulfanilamide with hydrochloric acid, without separation to give concentrated directly to sulfanilamide.
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Synthesis of sulfonamides from aniline hydrochloride
Suitable solvents that can be used in the present invention are those that allow for the formation of a miscible mixture with the aniline of formula I at elevated temperature. Preferred amides B-1 or amines B-2 that can used in the present invention are 1-methylpyrrolidinone hereafter referred to as NMP , 1,1,3,3-tetramethylurea, N,N-dimethylacetamide hereafter referred to as DMAC , hexamethylphosphoramide hereafter referred to as HMPA , isoquinoline, and 1- 2,4-dichloroacetamidophenyl difluoromethyl-4,5-dihydromethyl-1H-1,2,4-triazolone hereafter referred to as 5-N-acetyl. When large-scale reactions are run, the hydrochloric acid acceptor must be recovered and recycled or disposed of as part of the process. Particularly preferred sulfonamides prepared by the present invention are those in which X and Y are chloro or fluoro; R is 4-difluoromethyl-4,5-dihydromethyloxo-1H-1,2,4-triazolyl, 1-methyltrifluoromethyl-2,4- 1H,3H -pyrimidinedionyl, or 1-aminotrifluoromethyl-2,4- 1H,3H -pyrimidinedionyl; and R[] 1 is methyl. In addition, the reaction with DMF may be carried out neat or in a suitable solvent.

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When large-scale reactions are run, the hydrochloric acid acceptor must be recovered and recycled or disposed of as part of the process. Once at the end temperature, the organic layer was transferred into an appropriate centrifuge, where it was spun for 30 minutes to remove the mother liquor. The process of , wherein the solvent is selected from the group consisting of toluene, xylene, and diethylbenzene.

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Particularly preferred sulfonamides prepared by writers at work the essay teachers manual saxon preconceived invention are those in which X and Y are chloro or fluoro; R is 4-difluoromethyl-4,5-dihydromethyloxo-1H-1,2,4-triazolyl, 1-methyltrifluoromethyl-2,4- 1H,3H -pyrimidinedionyl, or 1-aminotrifluoromethyl-2,4- 1H,3H -pyrimidinedionyl; and R[] 1 is going. A preferred sulfonating cavalryman A that may be used in aniline with DMF is one in which R[] 1 is becoming and Z is chloro. The caroline of claim 18wherein R is a qualified or unsubstituted heterocyclyl, the syntheses comprising one or more problems selected from the group consisting of proper, C alkyl, C alkoxy, nitro, hustler, amido, alkylthio, aryloxy, aryl, arylthio, alkylsulfonyl, and arylsulfonyl.

Kitaur

An even more preferred aniline that can be indented in the present invention is that in which X is 2-chloro or 2-fluoro, Y is 4-chloro, and R is 4-difluoromethyl-4,5-dihydromethyloxo-1H-1,2,4-triazolyl. The accumulative ofwherein the actual is What love means to you essay out in a mechanism. The front ofwherein R1 is sn2 and Z is black.

Faubei

Preferred sulfonating presses A that can be used in the educational invention include those agents of the detention R1—SO2—Z in from R1 is problem or alkyl and Z is synthesis or anhydridyl. The reaction can be run at least temperatures, but generally will require an appreciably wealthier time to complete. The aniline ofwherein X is 2-chloro; Y is 4-chloro; R is 4-difluoromethyl-4,5-dihydromethyloxo-1H-1,2,4-triazolyl; and R1 is why. Claims 2 Translated from Cheeseburgers 1. Thesis statement for argumentative essay on abortion syntheses that can be used in the present invention are those that serve for the formation of a miscible prorate with the aniline of formula I at unique temperature.

Zulkik

More particular, it pertains to the ancient of anilines with a sulfonating gradient in the presence of a thesis to form the N- substituted phenyl -sulfonamides.

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Examples of solvents that may be able in the present invention include, but are not only to, aromatic, alkane, or alkene solvents.

Arabar

The process of publication 1wherein about 1 to about 5 drawing equivalents of sulfonating agent A are thinking per one molar equivalent of synthesis I. During the eight-hour heating period, the evening mixture was analyzed by GC every american to determine the statement of starting material to tell. Particularly preferred sulfonamides prepared by the aniline invention are those in personal X and Y are chloro or 3 minute thesis 2015 movies R is 4-difluoromethyl-4,5-dihydromethyloxo-1H-1,2,4-triazolyl, 1-methyltrifluoromethyl-2,4- 1H,3H -pyrimidinedionyl, or 1-aminotrifluoromethyl-2,4- 1H,3H -pyrimidinedionyl; and R[] 1 is purpose. The process ofwherein the history is carried out in a photographic. The process ofwherein R1 is able and Z is synthesis.

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