Participants
| Role | Name | HCID | Charge |
|---|
| Reactant | Oxygen | HCID 977 | — |
| Reactant | Sodium Carbonate | HCID 10340 | — |
| Reactant | 4-Hydroxy-3-(2-(2-hydroxy-1-naphthalenyl)diazenyl)benzenesulfonic acid | HCID 16410 | — |
| Reactant | 2-(Bis(4-(dimethylamino)phenyl)methyl)-5-(dimethylamino)benzoic acid | HCID 102063 | — |
| Product | Crystal Violet lactone | HCID 73773 | — |
Reaction Steps
In accordance with the process of Example 1, the aqueous solution containing sodium carbonate and 2-[4,4'-bis-(dimethylamino)-benzhydryl]-5-dimethylaminobenzoic acid and cobalt complex of 1-[(2-hydroxynaphthyl)azo]-2-hydroxybenzene-5-sulfonic acid, was heated at 90° C. and 1.6 wt. parts of oxygen was fed into it under the atmospheric pressure during 5 hours, and the precipitate was separated by a filtration and washed with a dilute aqueous solution of sodium hydroxide and with water to obtain 40.7 wt. parts of 3,3-bis-(4-dimethylaminophenyl)-6-dimethylaminophthalide having a melting point of 181° to 183° C.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
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| Patent number | US04271075 |
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| Source dataset | uspto-grants-1981_06 |
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| ORD ID | ord-72c606ac8fb14cd1a63960a00e4230d0 |
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| Source note | uspto-grants-1981_06 |
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