HuagongsheHuagongshe Chemistry Print Report · For research reference only
Trifluoroacetic acid → Methyl 3-amino-5-(3,3-dimethylbut-1-yn-1-yl)thiophene-2-carboxylate
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Trifluoroacetic acid | HCID 6422 | — |
| Reactant | 3-Tert-butoxycarbonylamino-5-(3,3-dimethyl-but-1-ynyl)-thiophene-2-carboxylic acid methyl ester | HCID 24989345 | — |
| Solvent | Dichloromethane | HCID 6344 | — |
| Product | Methyl 3-amino-5-(3,3-dimethylbut-1-yn-1-yl)thiophene-2-carboxylate | HCID 24989346 | 137.9% |
Reaction Steps
To a solution of 5-(3,3-dimethyl-but-1-ynyl)-3-(tert-butoxycarbonyl)amino-thiophene-2-carboxylic acid methyl ester (4.344 g, 9.58 mmol) in CH2Cl2 (30 mL) is added trifluoroacetic acid (30 mL), and the mixture is stirred at room temperature overnight. Then it is evaporated to dryness, obtained residue is redissolved in CH2Cl2 and washed with aqueous NaHCO3 and brine. Organic fraction is separated, dried over Na2SO4, and concentrated to give 3.135 g of crude 5-(3,3-dimethyl-but-1-ynyl)-3-amino-thiophene-2-carboxylic acid methyl ester.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US08658674B2 |
| Source dataset | uspto-grants-2014_02 |
| ORD ID | ord-45084aac4d4f48109501aa0ecf301bff |
| Source note | uspto-grants-2014_02 |