Buchwald–Hartwig amination: (R)-2-chloro-6-methyl-8-phenyl-5,6,7,8-tetrahydropyrimido[5,4-f][1,4]oxazepine → (R)-N-(3-methoxy-4-(4-methyl-1H-imidazol-1-yl)phenyl)-6-methyl-8-phenyl-5,6,7,8-tetrahydropyrimido[5,4-f][1,4]oxazepin-2-amine
15% yield, run at 120 °C, as recorded by experimental reaction archive. The written procedure is below. One of 7 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 | (R)-2-chloro-6-methyl-8-phenyl-5,6,7,8-tetrahydropyrimido[5,4-f][1,4]oxazepine | C₁₄H₁₄ClN₃O | |
| Reactant | 3-methoxy-4-(4-methyl-1H-imidazol-1-yl)aniline | C₁₁H₁₃N₃O | |
| Reagent | Cesium carbonate | CCs₂O₃ | |
| Catalyst | Tris(1,1-dimethylethyl)phosphine | C₁₂H₂₇P | |
| Catalyst | Palladium (II) acetate | C₄H₈O₄Pd | |
| Solvent | 1,4-Dioxane | C₄H₈O₂ | |
| Product | (R)-N-(3-methoxy-4-(4-methyl-1H-imidazol-1-yl)phenyl)-6-methyl-8-phenyl-5,6,7,8-tetrahydropyrimido[5,4-f][1,4]oxazepin-2-amine | C₂₅H₂₆N₆O₂ | 15% |
Conditions
- Temperature
- 120 °C
Yield
- 15% of (R)-N-(3-methoxy-4-(4-methyl-1H-imidazol-1-yl)phenyl)-6-methyl-8-phenyl-5,6,7,8-tetrahydropyrimido[5,4-f][1,4]oxazepin-2-amine.
Every recorded run making this product
7 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); Palladium (II) acetate | Cesium carbonate | 1,4-Dioxane | 130 °C | — | 30% |
| Tris(1,1-dimethylethyl)phosphine; Palladium (II) acetate | Cesium carbonate | 1,4-Dioxane | 120 °C | — | 15% (this run) |
| 2-(Dicyclohexylphosphino)biphenyl; Palladium (II) acetate | Cesium carbonate | 1,2-Dimethoxyethane | 100 °C | — | 7% |
| Binap, (A+-)-; Palladium (II) acetate | Potassium Carbonate | Toluene | 120 °C | — | 0% |
| Tris(1,1-dimethylethyl)phosphine; Palladium (II) acetate | Sodium 2-methylbutan-2-olate | 1,4-Dioxane | 120 °C | — | 0% |
| Binap, (A+-)-; Bis(dibenzylideneacetone)palladium | sodium 2-methylpropan-2-olate | Toluene | 120 °C | — | 0% |
| 1,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine); Bis(dibenzylideneacetone)palladium | Cesium carbonate | 1,4-Dioxane | 130 °C | — | 0% |
Procedure
Copied from the source record, unedited
(R)-2-chloro-6-methyl-8-phenyl-5,6,7,8-tetrahydropyrimido[5,4-f][1,4]oxazepine (0.05 g, 0.18 mmol), 3-methoxy-4-(4-methyl-1H-imidazol-1-yl)aniline (0.037 g, 0.18 mmol) (0.65), PALLADIUM(II) ACETATE (1.221 mg, 5.44 µmol), CESIUM CARBONATE (0.071 g, 0.22 mmol) and Tri-tert- butylphosphonium tetrafluoriborate (0.0043 g, 0.014 mmol, 6 mol%) in 1 ml of dioxane was degaset over argone and heated in MW 120°C 30 min. 002 - 4.8% of conversion mixture was heated more in MW 140°C 30 min. 003 - 15% of conversion mixture was heated more in MW 160°C 30 min. Experiment was not progressed.
The source
This record comes from experimental reaction archive (ord-3d675e76027a44c193655dafbce49365). Open the source and check it against what is on this page.
experimental reaction archive record ord-3d675e76027a44c193655dafbce49365 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.
The pathway is a separate question, kept on separate pages. A mechanism here is the canonical arrow pushing for a class, run on real structures and labelled rule-derived. It is not evidence, and this record is not a mechanism.
Where to next
More Buchwald–Hartwig amination records
Other runs of this class, one page per distinct transformation.
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