Triphenylphosphine → Tert-butyl 2-(6-bromo-3-[bis-(tert-butoxycarbonyl)amino]-2-methoxycarbonylphenoxymethyl)-2,5-dihydropyrrole-1-carboxylate

HRID 595114Notes

Reaction equation

HRID 595114 reaction equation
CC(OC(/N=N/C(OC(C)C)=O)=O)C.[Br:15][C:16]1[C:17]([OH:41])=[C:18]([C:23]([N:26]([C:34]([O:36][C:37]([CH3:40])([CH3:39])[CH3:38])=[O:35])[C:27]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:28])=[CH:24][CH:25]=1)[C:19]([O:21][CH3:22])=[O:20].O[CH2:43][CH:44]1[CH:48]=[CH:47][CH2:46][N:45]1[C:49]([O:51][C:52]([CH3:55])([CH3:54])[CH3:53])=[O:50].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>C1COCC1>[Br:15][C:16]1[C:17]([O:41][CH2:43][CH:44]2[CH:48]=[CH:47][CH2:46][N:45]2[C:49]([O:51][C:52]([CH3:53])([CH3:55])[CH3:54])=[O:50])=[C:18]([C:19]([O:21][CH3:22])=[O:20])[C:23]([N:26]([C:27]([O:29][C:30]([CH3:33])([CH3:31])[CH3:32])=[O:28])[C:34]([O:36][C:37]([CH3:40])([CH3:39])[CH3:38])=[O:35])=[CH:24][CH:25]=1

Participants

6

Reactant 4

HCID 11776TriphenylphosphineHCID 5363146Diisopropyl azodicarboxylateHCID 11095619tert-butyl 2-(hydroxymethyl)-2,5-dihydro-1H-pyrrole-1-carboxylateHCID 70983234Methyl 3-bromo-6-bis-(tert-butoxycarbonyl)amino-2-hydroxybenzoate2×

Product 1

HCID 86712822Tert-butyl 2-(6-bromo-3-[bis-(tert-butoxycarbonyl)amino]-2-methoxycarbonylphenoxymethyl)-2,5-dihydropyrrole-1-carboxylateYield 113.8%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

Diisopropylazodicarboxylate (1.4 g) was added to a suspension of methyl 3-bromo-6-[bis-(tert-butoxycarbonyl)amino]-2-hydroxybenzoate (Intermediate 13, 2.58 g), tert-butyl 2-hydroxymethyl-2,5-dihydropyrrole-1-carboxylate (Prepared according to Morriello et al, Bioorg. Med. Chem, 2008, 16(5), 2156; 1.27 g) and triphenylphosphine (1.82 g) in anhydrous THF (20 mL) and the mixture was stirred at room temperature overnight. The volatiles were removed in vacuo and the residue was purified by chromatography on silica, eluting with a mixture of ethyl acetate and cyclohexane with a gradient of 5-25% to give tert-butyl 2-(6-bromo-3-[bis-(tert-butoxycarbonyl)amino]-2-methoxycarbonylphenoxymethyl)-2,5-dihydropyrrole-1-carboxylate (4.13 g) as a light brown oil.

Workup

  1. customThe volatiles were removed in vacuo
  2. customthe residue was purified by chromatography on silica
  3. washeluting with a mixture of ethyl acetate and cyclohexane with a gradient of 5-25%

Sources & evidence

ORD record
ord-1da8d55a5bd4431180ca2f5d19eb67c3
Source dataset
uspto-grants-2016_01
Patent number
US09242997B2

Reaction notes

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