tert-Butanol → (2S,3S)-1-tert-Butoxycarbonyl-3-(2-methoxybenzyl)amino-2-phenylpiperidine

HRID 1856772Notes

Reaction equation

HRID 1856772 reaction equation
Cl.Cl.[CH3:3][O:4][C:5]1[CH:24]=[CH:23][CH:22]=[CH:21][C:6]=1[CH2:7][NH:8][C@H:9]1[CH2:14][CH2:13][CH2:12][NH:11][C@H:10]1[C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1.[OH-].[Na+].O(OC(C(C)(C)C)=O)[O:28][C:29](C(C)(C)C)=O.[C:42]([OH:46])([CH3:45])([CH3:44])[CH3:43]>>[C:42]([O:46][C:29]([N:11]1[CH2:12][CH2:13][CH2:14][C@H:9]([NH:8][CH2:7][C:6]2[CH:21]=[CH:22][CH:23]=[CH:24][C:5]=2[O:4][CH3:3])[C@@H:10]1[C:15]1[CH:16]=[CH:17][CH:18]=[CH:19][CH:20]=1)=[O:28])([CH3:45])([CH3:44])[CH3:43]

Participants

5

Reactant 4

HCID 6386tert-ButanolHCID 14798Sodium HydroxideHCID 14215521(tBuOCO)2OHCID 68466923CP 99994 dihydrochloride

Product 1

HCID 11223212(2S,3S)-1-tert-Butoxycarbonyl-3-(2-methoxybenzyl)amino-2-phenylpiperidine

Procedure

To a stirred and ice-cooled mixture of Compound 3 (10.0 g, 27.1 mmol), 3.0 M NaOH aq. (36.1 ml, 108.4 mmol) and tert-BuOH (15.0 ml) was added (tert-BuOCO)2O (Boc2O, 7.39 g, 33.8 mmol). After stirring at room temperature overnight, the mixture was extracted with AcOEt (x3). The combined AcOEt extracts were washed with sat. NaHCO3 and brine, dried over Na2SO4, and concentrated to give Compound 4 (11.3 g, quant.) as a pale yellow syrup.

Workup

  1. temperatureice-cooled
  2. stirringAfter stirring at room temperature overnight
  3. extractionthe mixture was extracted with AcOEt (x3)
  4. washThe combined AcOEt extracts were washed with sat. NaHCO3 and brine
  5. dry with materialdried over Na2SO4
  6. concentrationconcentrated

Sources & evidence

ORD record
ord-bb619cae5f0a4c1da9253b0ead3507c2
Source dataset
uspto-grants-2000_11
Patent number
US06143767

Reaction notes

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