HuagongsheHuagongshe Chemistry Print Report · For research reference only
Ethanol → Phenolindophenol
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Ethanol | HCID 702 | — |
| Reactant | Triethylamine | HCID 8471 | — |
| Reactant | Phenol, 4-amino-2,6-dichloro-, hydrochloride (1:1) | HCID 162059 | — |
| Reactant | 4,4-Dibromopyrazolone | HCID 23446963 | — |
| Product | Phenolindophenol | HCID 10379 | — |
Reaction Steps
To a warm ethanol solution containing 5.8 g. (0.01 mol) of the dibromopyrazolone (Compound 2-A) are added 2.4 g. (0.011 mol) of 4-amino-2,6-dichlorophenol hydrochloride. After this has dissolved, 3.3 g. of triethylamine are added. The solution, which quickly becomes magenta, is stirred for 15 minutes and cooled in an ice-acetone bath. The solid recovered is the dye IV with traces of impurity; m.p. 215°-217° C. (dec.). ##SPC4##
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US03952009 |
| Source dataset | uspto-grants-1976_04 |
| ORD ID | ord-822948f98bc5468ea50c544d2285d709 |
| Source note | uspto-grants-1976_04 |