Participants
| Role | Name | HCID | Charge |
|---|
| Reactant | Urea | HCID 1176 | — |
| Reactant | O-Phenylenediamine | HCID 7243 | — |
| Product | 2-Hydroxy benzimidazole | HCID 11985 | 87.6% |
Reaction Steps
A mixture of o-phenylenediamine (15.0 g) and urea (50.0 g) was heated at a temperature of 170° C. for a period of 45 min. The solid product was washed with water and recrystallised from ethanol to give benzimidazolin-2-one (16.3 g) as colourless crystals, mp>260° C.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|
| Patent number | US04314065 |
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| Source dataset | uspto-grants-1982_02 |
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| ORD ID | ord-60618dd3f69b433cbc0c8ea65952050a |
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| Source note | uspto-grants-1982_02 |
|---|
