FIELD: chemistry.
SUBSTANCE: invention relates to the method of obtaining phenothyazine, which consists in the fusion of diphenylamine with elemental sulfur in the presence of catalytic amounts of iodine followed by cooling and recrystallization, characterized in that the boiling of the resulting sludge is carried out in toluene for 50-60 minutes, then cooled to 70°C, ethyl alcohol is added, the mixture is boiled for 50-60 minutes and cooled.
EFFECT: new method of obtaining phenothyazine is developed, the difference of which is a new method of recrystallizing phenothyazine, that allows to obtain a product with a higher yield and purity.
1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR PRODUCING BETULINOL DIPHTALATE | 2016 |
|
RU2614149C1 |
| METHOD OF PURIFYING LACTIDE FROM INITIATING IMPURITIES | 2023 |
|
RU2816655C1 |
| METHOD OF 2-N-PHENYLAMINO-2-CYANOADAMANTANE OR ITS DERIVATIVES PRODUCTION | 2007 |
|
RU2344124C1 |
| 1,1,1,2,3,3-HEXAFLUORO-2-IODINE-3-METHOXYPROPANE AS SEMI-PRODUCTS FOR PRODUCTION OF FLUORIDE 2,3,3,3-TETRAFLUORO-2-IODPROPIONYL AND METHOD OF PRODUCING LATTER | 2017 |
|
RU2641110C1 |
| METHOD OF PRODUCING 2-NITRODIPHENYLAMINE | 2010 |
|
RU2447058C1 |
| METHOD FOR OBTAINING 3-ACETATE-28-SUCCINATE BETULINOL | 2021 |
|
RU2779623C1 |
| METHOD OF PRODUCING BETULINOL DISUCCINATE | 2017 |
|
RU2638160C1 |
| METHOD OF PRODUCING 5,8-(BIS(METHYLENE(N,N-DIMETHYL-N-DODECYLAMMONIUM))-2-ETHYL-4H-[1,3]DIOXINO[4,5-C]PYRIDINIUM DICHLORIDE | 2019 |
|
RU2697848C1 |
| NEW CRYSTALLINE FORMS OF 4-[4-[4-(HYDROXYDIPHENYLMETHYL)-1-PIPERIDINYL]-1-HYDOXYBUTHYL-α, α-DYMETHYLBENZENEACETIC ACID AND HYDROCHLORIDE THEREOF AND METHOD FOR PRODUCTION THE SAME | 2001 |
|
RU2269516C2 |
| METHOD OF PRODUCING PENTAFLUOROIODOETHANE | 2017 |
|
RU2642789C1 |
