HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1465165Generated: October 26, 2026
Propargyl alcohol → N-(2-(3-hydroxyprop-1-ynyl)-4-methylphenyl)-6-(trifluoromethoxy)-3,4-dihydro-2H-benzo[b][1,4]oxazine-2-carboxamide
https://huagongshe.com/reaction/1465165
Participants
| Role | Name | HCID | Charge |
|---|
| Reactant | Propargyl alcohol | HCID 7859 | — |
| Reactant | Triethylamine | HCID 8471 | — |
| Reactant | N-(2-bromo-4-methyl-phenyl)-6-(trifluoromethoxy)-3,4-dihydro-2H-1,4-benzoxazine-2-carboxamide | HCID 59394939 | — |
| Catalyst | Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI) | HCID 24350 | — |
| Catalyst | HCID 178418476 | HCID 178418476 | — |
| Solvent | Dimethylformamide | HCID 6228 | — |
| Product | N-(2-(3-hydroxyprop-1-ynyl)-4-methylphenyl)-6-(trifluoromethoxy)-3,4-dihydro-2H-benzo[b][1,4]oxazine-2-carboxamide | HCID 59395024 | 72.8% |
Reaction Steps
Prop-2-yn-1-ol (195 mg, 202 μL, 3.48 mmol), N-(2-bromo-4-methyl-phenyl)-6-(trifluoromethoxy)-3,4-dihydro-2H-1,4-benzoxazine-2-carboxamide (300 mg, 0.69 mmol), PdCl2(PPh3)2 (122 mg, 0.17 mmol), CuI (19.88 mg, 0.10 mmol), and triethylamine (970 μL, 6.96 mmol) were combined in DMF (5 mL) and heated at 75° C. for 18 h. Purification by silica gel chromatography (0-50% ethyl acetate/hexanes) provided N-(2-(3-hydroxyprop-1-ynyl)-4-methylphenyl)-6-(trifluoromethoxy)-3,4-dihydro-2H-benzo[b][1,4]oxazine-2-carboxamide (204 mg, 72% yield). LC/MS m/z 407.4 [M+H]+.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
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| Patent number | US08999976B2 |
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| Source dataset | uspto-grants-2015_04 |
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| ORD ID | ord-42b2c66286e2400d9b5eb0e08e2cabc6 |
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| Source note | uspto-grants-2015_04 |
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