Tert-butyl 2-amino-6-[2-(benzyloxy)phenyl]-4-{1-[(tert-butoxycarbonyl)amino]-2-phenylethyl}nicotinate → Tert-butyl 1-{2-amino-6-[2-(benzyloxy)phenyl]-3-formyl-4-pyridinyl}-2-phenylethylcarbamate

HRID 412284Notes

Reaction equation

HRID 412284 reaction equation
[NH2:1][C:2]1[N:14]=[C:13]([C:15]2[CH:20]=[CH:19][CH:18]=[CH:17][C:16]=2[O:21][CH2:22][C:23]2[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=2)[CH:12]=[C:11]([CH:29]([NH:37][C:38]([O:40][C:41]([CH3:44])([CH3:43])[CH3:42])=[O:39])[CH2:30][C:31]2[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=2)[C:3]=1[C:4](OC(C)(C)C)=[O:5].COCCO[AlH2-]OCCOC.[Na+]>C1COCC1>[C:41]([O:40][C:38](=[O:39])[NH:37][CH:29]([C:11]1[CH:12]=[C:13]([C:15]2[CH:20]=[CH:19][CH:18]=[CH:17][C:16]=2[O:21][CH2:22][C:23]2[CH:24]=[CH:25][CH:26]=[CH:27][CH:28]=2)[N:14]=[C:2]([NH2:1])[C:3]=1[CH:4]=[O:5])[CH2:30][C:31]1[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=1)([CH3:44])([CH3:42])[CH3:43]

Participants

4

Reactant 2

HCID 10121373Tert-butyl 2-amino-6-[2-(benzyloxy)phenyl]-4-{1-[(tert-butoxycarbonyl)amino]-2-phenylethyl}nicotinateHCID 16684438Red-Al

Product 1

HCID 20585432Tert-butyl 1-{2-amino-6-[2-(benzyloxy)phenyl]-3-formyl-4-pyridinyl}-2-phenylethylcarbamateYield 51%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a cold (0° C.) solution of tert-butyl 2-amino-6-[2-(benzyloxy)phenyl]-4-{1-[(tert-butoxycarbonyl)amino]-2-phenylethyl}nicotinate (0.100 g, 0.198 mmol) in THF (1.50 mL) was added dropwise Vitride® (0.500 mL), and the stirring was continued for 2 hrs. The mixture was quenched at 0° C. with saturated aqueous NH4Cl solution, and extracted with ethyl acetate. The separated organic phase was washed with water and brine successively, dried over Na2SO4, filtered and concentrated under reduced pressure. The crude product was purified by column chromatography on silica gel (hexane:ethyl acetate, 1:1) to give tert-butyl-1-{2-amino-6-[2-(benzyloxy)phenyl]-3-formyl-4-pyridinyl}-2-phenylethylcarbamate as a colorless oil (0.044 g, yield; 51%).

Workup

  1. customThe mixture was quenched at 0° C. with saturated aqueous NH4Cl solution
  2. extractionextracted with ethyl acetate
  3. washThe separated organic phase was washed with water and brine successively
  4. dry with materialdried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe crude product was purified by column chromatography on silica gel (hexane:ethyl acetate, 1:1)

Sources & evidence

ORD record
ord-0623dc8a3c44419ea95309bd97210323
Source dataset
uspto-grants-2003_05
Patent number
US06562811B1

Reaction notes

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