Tributylstannane → HCID 12094206, compound

HRID 2306646Notes

Reaction equation

HRID 2306646 reaction equation
C(NC(C)C)(C)C.C([Li])CCC.[CH2:13]([SnH:17]([CH2:22][CH2:23][CH2:24][CH3:25])[CH2:18][CH2:19][CH2:20][CH3:21])[CH2:14][CH2:15][CH3:16].[C:26]([O:30][C:31]([N:33]1[CH2:38][CH2:37][C:36](=[O:39])[CH2:35][CH2:34]1)=[O:32])([CH3:29])([CH3:28])[CH3:27]>C1COCC1>[C:26]([O:30][C:31]([N:33]1[CH2:38][CH2:37][C:36]([OH:39])([Sn:17]([CH2:13][CH2:14][CH2:15][CH3:16])([CH2:18][CH2:19][CH2:20][CH3:21])[CH2:22][CH2:23][CH2:24][CH3:25])[CH2:35][CH2:34]1)=[O:32])([CH3:29])([CH3:27])[CH3:28]

Participants

6

Reactant 4

HCID 5948TributylstannaneHCID 7912DiisopropylamineHCID 735900tert-Butyl 4-oxopiperidine-1-carboxylateHCID 178418339Butyllithium

Product 1

HCID 12094206HCID 12094206, compoundYield 49%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent3×

Conditions

Temperature
0 °C

Procedure

Scheme IIb, step A: Diisopropylamine (25.2 mL, 0.18 mol) in anhydrous THF (500 mL) was cooled to 0° C. and n-butyllithium (112.5 mL of a 1.6 M solution in THF, 0.18 mol) was added dropwise over 20 minutes to the cooled solution. The reaction mixture was stirred for an additional 15 minutes at 0° C. and then tri-n-butyltinhydride (48.4 mL, 0.18 mol) was added dropwise over 30 minutes. The reaction mixture was then stirred for one hour and then cooled to −78° C. N-(t-butoxycarbonyl)-4-piperidone (30.0 g, 0.15 mol) in THF (500 mL) was then added dropwise to the cooled solution over one hour. After addition was complete, the reaction was stirred for 2 hours at −78° C. and then quenched with buffer (pH 6). The mixture was extracted with ethyl acetate, the organic extracts were combined, dried over anhydrous sodium sulfate, filtered and concentrated under vacuum. The residue was purified by flash chromatography (5% ethyl acetate/hexane to provide 1-(t-butoxycarbonyl)-4-hydroxy-4-tributylstannyl piperidine (36.06 g).

Workup

  1. stirringThe reaction mixture was then stirred for one hour
  2. temperaturecooled to −78° C
  3. additionAfter addition
  4. stirringthe reaction was stirred for 2 hours at −78° C.
  5. customquenched with buffer (pH 6)
  6. extractionThe mixture was extracted with ethyl acetate
  7. dry with materialdried over anhydrous sodium sulfate
  8. filtrationfiltered
  9. concentrationconcentrated under vacuum
  10. customThe residue was purified by flash chromatography (5% ethyl acetate/hexane

Sources & evidence

ORD record
ord-8df60ec472324657aa7e662a914e7dff
Source dataset
uspto-grants-2004_12
Patent number
US06828332B1

Reaction notes

Loading…