Buchwald–Hartwig amination, record ord-4695ad3979554c448a445867cc030440
One recorded run of this reaction. Below is what the source recorded, and nothing added to it.
What was in the flask
| Role | Species | Formula | Yield |
|---|---|---|---|
| Reactant | 3-(2,5-Dichloropyrimidin-4-yl)imidazo[1,2-a]pyridine | C₁₁H₆Cl₂N₄ | |
| Reactant | 4-Amino-3-methoxybenzaldehyde | C₈H₉NO₂ | |
| Reagent | 1,8-Diazabicyclo(5.4.0)undec-7-ene | C₉H₁₆N₂ | |
| 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 | 4-(5-Chloro-4-(imidazo[1,2-a]pyridin-3-yl)pyrimidin-2-ylamino)-3-methoxybenzaldehyde | C₁₉H₁₄ClN₅O₂ | 34.9% |
Conditions
- Temperature
- 120 °C
Yield
- 35% of 4-(5-Chloro-4-(imidazo[1,2-a]pyridin-3-yl)pyrimidin-2-ylamino)-3-methoxybenzaldehyde.
Procedure
Copied from the source record, unedited
3-(2,5-dichloropyrimidin-4-yl)imidazo[1,2-a]pyridine (4 g, 15.09 mmol), 4-amino-3-methoxybenzaldehyde (2.281 g, 15.09 mmol), 9,9-DIMETHYL-4,5-BIS(DIPHENYLPHOSPHINO)XANTHENE (0.873 g, 1.51 mmol), TRIS(DIBENZYLIDENEACETONE)DIPALLADIUM (0.345 g, 0.38 mmol) and 1,8-DIAZABICYCLO [5.4.0] UNDEC-7-ENE (5.64 ml, 37.72 mmol) were dissolved in Dioxane (120 ml) then degazed and purged with argon. The reaction was heated to reflux (bath 120°C) for 2H30. Reaction mixture was filtered through a filter cup and concentrated. FR01132-77-01 w=14.65 g The crude product was purified by flash chromatography (NOVASEP) on silica gel ( 15-40µm ) eluting with 0 to 5% methanol in dichloromethane. The solvent was evaporated to dryness to afford 4-(5-chloro-4-(imidazo[1,2-a]pyridin-3-yl)pyrimidin-2-ylamino)-3-metho
The source
This record comes from experimental reaction archive (ord-4695ad3979554c448a445867cc030440). Open the source and check it against what is on this page.
experimental reaction archive record ord-4695ad3979554c448a445867cc030440 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.