Borane;tetrahydrofuran → 3-((S)-1-(4-bromophenyl)ethyl)-6-(3-hydroxypropyl)-6-isopropyl-1,3-oxazinan-2-one

HRID 1096452Notes

Reaction equation

HRID 1096452 reaction equation
[CH2:1]([C:4]1([CH:20]([CH3:22])[CH3:21])[O:9][C:8](=[O:10])[N:7]([C@H:11]([C:13]2[CH:18]=[CH:17][C:16]([Br:19])=[CH:15][CH:14]=2)[CH3:12])[CH2:6][CH2:5]1)[CH:2]=[CH2:3].B.C1C[O:27]CC1>C1COCC1>[Br:19][C:16]1[CH:15]=[CH:14][C:13]([C@@H:11]([N:7]2[CH2:6][CH2:5][C:4]([CH2:1][CH2:2][CH2:3][OH:27])([CH:20]([CH3:22])[CH3:21])[O:9][C:8]2=[O:10])[CH3:12])=[CH:18][CH:17]=1

Participants

4

Reactant 2

HCID 2723981Borane;tetrahydrofuranHCID 596357496-allyl-3-((S)-1-(4-bromophenyl)ethyl)-6-isopropyl-1,3-oxazinan-2-one

Product 1

HCID 596357063-((S)-1-(4-bromophenyl)ethyl)-6-(3-hydroxypropyl)-6-isopropyl-1,3-oxazinan-2-oneYield 22%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 6-allyl-3-((S)-1-(4-bromophenyl)ethyl)-6-isopropyl-1,3-oxazinan-2-one (480 mg, 1.315 mmol) in THF (5 mL) was added BH3.THF (5.3 mL, 5.3 mmol) at 0° C. under N2. The reaction mixture was stirred for 2 h, and quenched with water, 3 M aq NaOH (1 mL), and H2O2 (5 mL). The resulting mixture was stirred for 2 h, extracted with EtOAc, washed with brine, dried over Na2SO4, filtered, and concentrated to afford the crude product, which was purified by prep TLC to give 3-((S)-1-(4-bromophenyl)ethyl)-6-(3-hydroxypropyl)-6-isopropyl-1,3-oxazinan-2-one. (110 mg, 22% yield). 1H NMR (CDCl3): δ 0.88 (m, 6H), 1.45 (m, 3H), 1.60 (m, 4H), 1.71 (m, 1H), 1.82 (m, 1H), 1.99 (m, 1H), 2.63 (m, 1H), 3.03 (m, 1H), 3.59 (m, 2H), 5.68 (m, 1H), 7.13 (d, 2H), 7.40 (d, 2H),

Workup

  1. customquenched with water, 3 M aq NaOH (1 mL), and H2O2 (5 mL)
  2. stirringThe resulting mixture was stirred for 2 h
  3. extractionextracted with EtOAc
  4. washwashed with brine
  5. dry with materialdried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customto afford the crude product, which
  9. customwas purified by prep TLC

Sources & evidence

ORD record
ord-05a14938f8704455b71544bc1b4cb2d8
Source dataset
uspto-grants-2012_03
Patent number
US08138178B2

Reaction notes

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