Buchwald–Hartwig amination, record ord-8fcffc24262340ad8745959198669390
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 | 5-(Benzyloxy)-2-chloropyridine | C₁₂H₁₀ClNO | |
| Reactant | tert-Butyl piperazine-1-carboxylate | C₉H₁₈N₂O₂ | |
| Reagent | sodium 2-methylpropan-2-olate | C₄H₉NaO | |
| Catalyst | Binap, (A+-)- | C₄₄H₃₂P₂ | |
| Catalyst | (1E,4E)-1,5-diphenylpenta-1,4-dien-3-one; palladium | C₃₄H₂₈O₂Pd | |
| Solvent | Toluene | C₇H₈ | |
| Product | Tert-butyl 4-(5-(benzyloxy)pyridin-2-YL)piperazine-1-carboxylate | C₂₁H₂₇N₃O₃ | 68.75% |
Conditions
- Temperature
- 80 °C
Yield
- 69% of Tert-butyl 4-(5-(benzyloxy)pyridin-2-YL)piperazine-1-carboxylate.
Procedure
Copied from the source record, unedited
BIS(DIBENZYLIDENEACETONE)PALLADIUM (0.055 g, 0.10 mmol) was added to tert- butyl piperazine-1-carboxylate (1.952 g, 10.48 mmol), 5-(benzyloxy)-2-chloropyridine (2.093 g, 9.53 mmol), 2,2'-bis(diphenylphosphino)-1,1'-binaphthyl (0.059 g, 0.10 mmol) and sodium 2-methylpropan-2-olate (1.282 g, 13.34 mmol) in toluene (30 mL) at 20ºC under nitrogen. The resulting solution was stirred at 80 °C for 16 hours then cooled to room temperature. The reaction mixture was filtered through celite, filtrate partitioned between ethyl acetate (100 mL) and water (100 mL). The organic phase was dried (Na2SO4), filtered and evaporated to give a brown gum. The crude product was purified by flash silica chromatography, elution gradient 0 to 20% EtOAc in isohexane. Pure fractions were evaporated to dryness to affor
The source
This record comes from experimental reaction archive (ord-8fcffc24262340ad8745959198669390). Open the source and check it against what is on this page.
experimental reaction archive record ord-8fcffc24262340ad8745959198669390 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.