Benzoic Acid → HCID 59455633, compound

HRID 547802Notes

Reaction equation

HRID 547802 reaction equation
[CH2:1]([O:8][C:9]([N:11]1[CH2:16][C@H:15]([OH:17])[CH2:14][C@@H:13]([O:18][Si:19]([C:22]([CH3:25])([CH3:24])[CH3:23])([CH3:21])[CH3:20])[CH2:12]1)=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[C:26](O)(=[O:33])[C:27]1[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=1.N(C(OCC)=O)=NC(OCC)=O.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>C1COCC1.COC(C)(C)C>[CH2:1]([O:8][C:9]([N:11]1[CH2:12][C@H:13]([O:18][Si:19]([C:22]([CH3:25])([CH3:24])[CH3:23])([CH3:20])[CH3:21])[CH2:14][C@H:15]([O:17][C:26](=[O:33])[C:27]2[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=2)[CH2:16]1)=[O:10])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

7

Reactant 4

HCID 243Benzoic AcidHCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 58386793HCID 58386793, compound

Product 1

HCID 59455633HCID 59455633, compoundYield 78%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 15413tert-Butyl methyl etherSolvent

Procedure

To a solution of 2.8 g (7.8 mmol) (3R,5R)-3-(tert-butyl-dimethyl-silanyloxy)-5-hydroxy-piperidine-1-carboxylic acid benzyl ester in 70 ml dry THF were consecutively added 1.0 g (8.5 mmol) benzoic acid, 1.7 g (8.5 mmol) diethyl azodicarboxylate and 2.2 g (8.5 mmol) triphenylphosphine at 0° C. After 6 h the reaction mixture was diluted with tert-butyl methyl ether washed with a 2N aqueous solution of sodium carbonate. The aqueous layer was extracted with 3 portions of tert-butyl methyl ether. The combined organic extracts were washed with a 2N aqueous solution of sodium carbonate and brine and dried over sodium sulfate. Flash chromatography gave 2.8 g (78%) of the title compound as a yellow oil.

Workup

  1. customat 0° C
  2. washwashed with a 2N aqueous solution of sodium carbonate
  3. extractionThe aqueous layer was extracted with 3 portions of tert-butyl methyl ether
  4. washThe combined organic extracts were washed with a 2N aqueous solution of sodium carbonate and brine
  5. dry with materialdried over sodium sulfate

Sources & evidence

ORD record
ord-858a3a3c76dc4294b41fa6134508361f
Source dataset
uspto-grants-2011_05
Patent number
US07939533B2

Reaction notes

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