HuagongsheHuagongshe Chemistry Print Report · For research reference only
Hydrazine hydrate (1:1) → 9-Bromo-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene-2-carboxylic acid hydrazide
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Hydrazine hydrate (1:1) | HCID 24654 | — |
| Reactant | Ethyl 9-bromo-4,5-dihydrobenzo[2,3]oxepino[4,5-D]thiazole-2-carboxylate | HCID 67050521 | — |
| Solvent | Ethanol | HCID 702 | — |
| Product | 9-Bromo-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene-2-carboxylic acid hydrazide | HCID 67096783 | — |
Reaction Steps
Alternatively, to a suspension of 9-bromo-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene-2-carboxylic acid ethyl ester (4.55 g) in ethanol (50 mL) was added hydrazine monohydrate (5 mL) and the reaction heated at reflux for 16 h. After cooling to room temperature, the solid was filtered, washed with diethyl ether and air-dried to give 9-bromo-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene-2-carboxylic acid hydrazide.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US07928248B2 |
| Source dataset | uspto-grants-2011_04 |
| ORD ID | ord-2851c5078b434f11b85803fe02fc7b60 |
| Source note | uspto-grants-2011_04 |