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Buchwald–Hartwig amination: 5-Bromo-2-(4-methanesulfonylbenzyloxy)pyridine → Tert-butyl 4-[6-[(4-methylsulfonylphenyl)methoxy]-3-pyridinyl]piperazine-1-carboxylate

43% yield, run at 80 °C, as recorded by experimental reaction archive. The written procedure is below.

verified record, 43% yield recorded, Not balanced as written, From experimental reaction archive

Reagents, catalysts and solvents are in the table below.

The atoms, from reactants to products

CCCCOCONCCNCCCCOCCCCCSCOOCCNCCCBr
Reactants · 1/6
breakingformingbond order changesmapped atom that changes

Drawn from the record's atom map: which bonds break and which form between the reactants and products the source listed. It shows a change in connectivity, not a simulated trajectory and not a mechanism.

What was in the flask

RoleSpeciesFormulaYield
Reactant5-Bromo-2-(4-methanesulfonylbenzyloxy)pyridineC₁₃H₁₂BrNO₃S—
Reactanttert-Butyl piperazine-1-carboxylateC₉H₁₈N₂O₂—
Reagentsodium 2-methylpropan-2-olateC₄H₉NaO—
CatalystBinap, (A+-)-C₄₄H₃₂P₂—
CatalystBis(dibenzylideneacetone)palladiumC₅₁H₄₂O₃Pd₂—
SolventTolueneC₇H₈—
ProductTert-butyl 4-[6-[(4-methylsulfonylphenyl)methoxy]-3-pyridinyl]piperazine-1-carboxylateC₂₂H₂₉N₃O₅S42.6%

The equation does not balance as written. That is usual for an experimental record: the source listed what it put in and what it measured, not a stoichiometric equation.

Conditions

Temperature
80 °C

Only the dimensions the source stated are listed. Anything absent here was not recorded, and it is not inferred from what the class usually needs.

Yield

  • 43% of Tert-butyl 4-[6-[(4-methylsulfonylphenyl)methoxy]-3-pyridinyl]piperazine-1-carboxylate.

Procedure

Copied from the source record, unedited

2,2'-bis(diphenylphosphino)-1,1'-binaphthyl (48.3 mg, 0.08 mmol) was added in one portion to 5-bromo-2-(4-(methylsulfonyl)benzyloxy)pyridine (257.9 mg, 0.75 mmol), tert-butyl piperazine-1-carboxylate (160.9 mg, 0.86 mmol), TRIS(DIBENZYLIDENEACETONE)DIPALLADIUM(0) (51.1 mg, 0.06 mmol) and sodium 2-methylpropan-2-olate (120.1 mg, 1.25 mmol) in toluene (10 mL). N2 was bubbled through the solvent for 15 minutes.The resulting mixture was stirred at 80 °C for over night under N2.The reaction mixture was filtered through celite. The reaction mixture was evaporated to dryness and redissolved in EtOAc (75 mL), and washed sequentially with water (2x75 mL) and saturated brine (100 mL). The organic layer was dried over MgSO4, filtered and evaporated to afford crude product. The crude product was purif

The source

This record comes from experimental reaction archive (ord-b165e514f9f846c2872fe8f816e6b2d7). Open the source and check it against what is on this page.

  • experimental reaction archive record ord-b165e514f9f846c2872fe8f816e6b2d7 from dataset "750 AstraZeneca ELN dataset" (url: https://chemrxiv.org/engage/chemrxiv/article-details/60c9e3f37792a23bfdb2d471). No atom mapping is provided by the source.

    experimental record · quality medium · source

experimental reaction record.

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.