Buchwald–Hartwig amination: 4-(4-Bromobenzyl)morpholine → 5-fluoro-4-[2-methyl-3-(oxan-4-yl)imidazol-4-yl]-N-[4-(morpholin-4-ylmethyl)phenyl]pyrimidin-2-amine
86% yield, run at 100 °C, as recorded by experimental reaction archive. The written procedure is below. One of 4 recorded runs making this product; all of them are compared below.
The atoms, from reactants to products
What was in the flask
| Role | Species | Formula | Yield |
|---|---|---|---|
| Reactant | 4-(4-Bromobenzyl)morpholine | C₁₁H₁₄BrNO | |
| Reactant | 5-fluoro-4-(2-methyl-1-(tetrahydro-2H-pyran-4-yl)-1H-imidazol-5-yl)pyrimidin-2-amine | C₁₃H₁₆FN₅O | |
| Reagent | Cesium carbonate | CCs₂O₃ | |
| Catalyst | 1,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine) | C₃₉H₃₂OP₂ | |
| Catalyst | Bis(dibenzylideneacetone)palladium | C₅₁H₄₂O₃Pd₂ | |
| Solvent | 1,4-Dioxane | C₄H₈O₂ | |
| Product | 5-fluoro-4-[2-methyl-3-(oxan-4-yl)imidazol-4-yl]-N-[4-(morpholin-4-ylmethyl)phenyl]pyrimidin-2-amine | C₂₄H₂₉FN₆O₂ | 85.5% |
Conditions
- Temperature
- 100 °C
Yield
- 86% of 5-fluoro-4-[2-methyl-3-(oxan-4-yl)imidazol-4-yl]-N-[4-(morpholin-4-ylmethyl)phenyl]pyrimidin-2-amine.
Every recorded run making this product
4 runs of this class made the same product and differed in what else was in the flask. They are listed from the highest yield down, with this page's run marked.
| Catalyst | Reagents | Solvent | Temp. | Time | Yield |
|---|---|---|---|---|---|
| 1,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine); Bis(dibenzylideneacetone)palladium | Cesium carbonate | 1,4-Dioxane | 100 °C | — | 86% (this run) |
| 1,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine); Bis(dibenzylideneacetone)palladium | Sodium 2-methylbutan-2-olate | Toluene | 110 °C | — | 6% |
| 2-Dicyclohexylphosphino-2',4',6'-triisoprophylbiphenyl; Bis(dibenzylideneacetone)palladium | Sodium 2-methylbutan-2-olate | Butyl Acetate | 100 °C | — | 0% |
| (R)-(-)-1-[(S)-2-(Dicyclohexylphosphino)ferrocenyl]ethyldi-t-butylphosphine;Ferrocene, 1-[(1R)-1-[bis(1,1-dimethylethyl)phosphino]ethyl]-2-(dicyclohexylphosphino)-, (2R)-; Palladium (II) acetate | Sodium 2-methylbutan-2-olate | 1,2-Dimethoxyethane | 90 °C | — | 0% |
Procedure
Copied from the source record, unedited
The aim of the reaction is optimization. Tris(dibenzylideneacetone)dipalladium(0) (4.5 mg, 4.91 µmol) and 9,9-Dimethyl-4,5-bis(diphenylphosphino)xanthene (5.1 mg, 8.81 µmol) were dissolved in dioxane (1.8 mL) in a 10 mL Schlenk tube and activated at 100 °C for 6 min under argon. Then 5-fluoro-4-(2-methyl-1-(tetrahydro-2H-pyran-4-yl)-1H-imidazol-5-yl)pyrimidin-2-amine (51 mg, 0.18 mmol), 4-(4-bromobenzyl)morpholine (51 mg, 0.20 mmol) and Cesium carbonate (94 mg, 0.29 mmol) were added. It was degassed again and stirred at 100 °C under argon. The reaction was followed by HPLC. After 26 h 85.5 % conversion was obtained. 20 % by-product formation was detected. Finally, the reaction mixture was discarded.
The source
This record comes from experimental reaction archive (ord-f88e9fa13a294cdea3238d7489919aa6). Open the source and check it against what is on this page.
experimental reaction archive record ord-f88e9fa13a294cdea3238d7489919aa6 from dataset "750 AstraZeneca ELN dataset" (url: https://chemrxiv.org/engage/chemrxiv/article-details/60c9e3f37792a23bfdb2d471). No atom mapping is provided by the source.
How to read this record
This is one experiment, not a rule. It says that on one occasion these species were combined under these conditions and this came out. It does not say the reaction will give the same result on your substrate, and nothing on the page has been generalised into a claim that it would.
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