HuagongsheHuagongshe Chemistry Print Report · For research reference only
Diisopropylamine → 4-Chloro-1,5-dimethyl-6-oxo-2-trimethylsilanylethynyl-1,6-dihydropyridine-3-carboxylic acid ethyl ester
Participants
| Role | Name | HCID | Charge |
|---|---|---|---|
| Reactant | Diisopropylamine | HCID 7912 | — |
| Reactant | Trimethylsilylacetylene | HCID 66111 | — |
| Reactant | 2-Bromo-4-chloro-1,5-dimethyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid ethyl ester | HCID 66674160 | — |
| Catalyst | Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI) | HCID 24350 | — |
| Catalyst | HCID 178418476 | HCID 178418476 | — |
| Solvent | Tetrahydrofuran | HCID 8028 | — |
| Solvent | Ethyl Acetate | HCID 8857 | — |
| Product | 4-Chloro-1,5-dimethyl-6-oxo-2-trimethylsilanylethynyl-1,6-dihydropyridine-3-carboxylic acid ethyl ester | HCID 66674895 | — |
Reaction Steps
To a mixture of 2-bromo-4-chloro-1,5-dimethyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid ethyl ester (1.00 equivalent), trimethylsilylacetylene (1.20 equivalents) and iPr2NH (2.00 equivalents) in THF is added CuI (0.10 equivalents) followed by Pd(PPh3)2Cl2 (0.10 equivalents). After stirring the reaction mixture at reflux for 16 hours, it is cooled to room temperature and diluted with ethyl acetate. The organic layer is washed with saturated NH4Cl solution and brine, dried (MgSO4) and concentrated under reduced pressure. The desired product is obtained by flash column chromatography as necessary.
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
|---|---|
| Patent number | US07517994B2 |
| Source dataset | uspto-grants-2009_04 |
| ORD ID | ord-41f10d609a324da39db2d4901b617c08 |
| Source note | uspto-grants-2009_04 |