RO88031B1 - Process for preparing 4-amino-2-methyl-n-(beta-methylsulphonamidoethyl)-n-ethylaniline sesquisulphate - Google Patents

Process for preparing 4-amino-2-methyl-n-(beta-methylsulphonamidoethyl)-n-ethylaniline sesquisulphate

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Publication number
RO88031B1
RO88031B1 RO113186A RO11318684A RO88031B1 RO 88031 B1 RO88031 B1 RO 88031B1 RO 113186 A RO113186 A RO 113186A RO 11318684 A RO11318684 A RO 11318684A RO 88031 B1 RO88031 B1 RO 88031B1
Authority
RO
Romania
Prior art keywords
sesquisulphate
solution
ethylaniline
beta
amino
Prior art date
Application number
RO113186A
Other languages
Romanian (ro)
Other versions
RO88031A2 (en
Inventor
Aurel Gansca
Elisabeta Joldos
Vasile Martin
Original Assignee
Institutul De Chimie
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Institutul De Chimie filed Critical Institutul De Chimie
Priority to RO84113186A priority Critical patent/RO88031A2/en
Publication of RO88031B1 publication Critical patent/RO88031B1/en
Publication of RO88031A2 publication Critical patent/RO88031A2/en

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Abstract

Prezenta inventie se refera la un procedeu de obtinere a sesquisulfatului de 4-amino-3-N-etilanilina, revelator color de baza în industria fotografica, folosind ca materie prima initiala, N-etil-m-toluidina, caracterizat prin aceea ca, în scopul simplificarii fluxului tehnologic prin eliminarea operatiei de separare a intermediarilor, se trateaza într-o prima etapa N-etil-m-toluidina cu beta-cloretilmetansulfonamida, în mediu de metanol, solutia obtinuta racindu-se la temperatura de -5 degree C...0 degree C, dupa care se adauga în a doua etapa azotit de sodiu, obtinîndu-se o solutie de nitrozoderivat, care se reduce într-o alta etapa cu zinc în mediu de acid acetic si acid clorhidric la temperatura de 30-30 degree C, solutia obtinuta se filtreaza si se adauga unei solutii de amoniac si cloroform, iar într-o ultima etapa se separa straturile cloroformice, care se trateaza cu acid sulfuric în mediu de etanol, formîndu-se sesquisulfatul respectiv, care se purifica în mod în sine cunoscut.The present invention relates to a process for the preparation of 4-amino-3-N-ethylaniline sesquisulphate, a basic color revealer in the photographic industry, using N-ethyl-m-toluidine as starting material, characterized in that the purpose of simplifying the technological flow by eliminating the separation of the intermediates is treated in a first step with N-ethyl-m-toluidine with beta-chloroethylmethanesulfonamide, in methanol, the obtained solution being cooled to -5 ° C. 0 ° C, after which it is added to the second step of sodium nitrite to obtain a nitrosodised solution which is reduced in another step with zinc in an acetic acid and hydrochloric acid medium at a temperature of 30-30 ° C C, the resulting solution is filtered and added to a solution of ammonia and chloroform, and in the last step the chloroform layers are separated, which is treated with sulfuric acid in ethanolic medium to form the sesquisulphate which is purified in s is known.

RO84113186A 1984-01-03 1984-01-03 PROCESS FOR OBTAINING 4-AMINO-3-METHYL-N- (BETA-METHYLSULFONAMIDOETHYL) -N-ETHYLANILINE SESQUISULFATE RO88031A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RO84113186A RO88031A2 (en) 1984-01-03 1984-01-03 PROCESS FOR OBTAINING 4-AMINO-3-METHYL-N- (BETA-METHYLSULFONAMIDOETHYL) -N-ETHYLANILINE SESQUISULFATE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RO84113186A RO88031A2 (en) 1984-01-03 1984-01-03 PROCESS FOR OBTAINING 4-AMINO-3-METHYL-N- (BETA-METHYLSULFONAMIDOETHYL) -N-ETHYLANILINE SESQUISULFATE

Publications (2)

Publication Number Publication Date
RO88031B1 true RO88031B1 (en) 1985-10-31
RO88031A2 RO88031A2 (en) 1985-11-30

Family

ID=20114194

Family Applications (1)

Application Number Title Priority Date Filing Date
RO84113186A RO88031A2 (en) 1984-01-03 1984-01-03 PROCESS FOR OBTAINING 4-AMINO-3-METHYL-N- (BETA-METHYLSULFONAMIDOETHYL) -N-ETHYLANILINE SESQUISULFATE

Country Status (1)

Country Link
RO (1) RO88031A2 (en)

Also Published As

Publication number Publication date
RO88031A2 (en) 1985-11-30

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