Diisopropylethylamine → 1,1-Dimethylethyl (2-{[(4,5-dibromo-2-furanyl)carbonyl]amino}-3-phenylpropyl)carbamate

HRID 2391964Notes

Reaction equation

HRID 2391964 reaction equation
[Br:1][C:2]1[CH:3]=[C:4]([C:8]([OH:10])=O)[O:5][C:6]=1[Br:7].C1CN([P+](Br)(N2CCCC2)N2CCCC2)CC1.F[P-](F)(F)(F)(F)F.C(N(C(C)C)CC)(C)C.[NH2:44][CH:45]([CH2:55][C:56]1[CH:61]=[CH:60][CH:59]=[CH:58][CH:57]=1)[CH2:46][NH:47][C:48](=[O:54])[O:49][C:50]([CH3:53])([CH3:52])[CH3:51]>C(Cl)Cl>[Br:1][C:2]1[CH:3]=[C:4]([C:8]([NH:44][CH:45]([CH2:55][C:56]2[CH:57]=[CH:58][CH:59]=[CH:60][CH:61]=2)[CH2:46][NH:47][C:48](=[O:54])[O:49][C:50]([CH3:53])([CH3:51])[CH3:52])=[O:10])[O:5][C:6]=1[Br:7]

Participants

6

Reactant 4

HCID 81531DiisopropylethylamineHCID 2733179PyBroPHCID 41948324,5-Dibromofuran-2-carboxylic acidHCID 20159911tert-butyl N-(2-amino-3-phenylpropyl)carbamate

Product 1

HCID 578264071,1-Dimethylethyl (2-{[(4,5-dibromo-2-furanyl)carbonyl]amino}-3-phenylpropyl)carbamateYield 107%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of 4,5-dibromo-2-furancarboxylic acid (2.81 g, 10.4 mmol), PyBrOP (5.6 g, 12.0 mmol) and diisopropylethyl amine (4.2 mL, 24.0 mmol) in DCM (70 mL) at 25° C. was added 1,1-dimethylethyl (2-amino-3-phenylpropyl)carbamate (2.0 g, 8.0 mmol). After 16 h, the solution was partitioned between H2O and washed with DCM. The combined organic fractions were dried (Na2SO4), concentrated and purified via column chromatography (silica, hexanes/EtOAc, 2:1) affording the title compound (4.3 g, 82%) as a white solid: LC-MS (ES) m/z=503 (M+H)+.

Workup

  1. customthe solution was partitioned between H2O
  2. washwashed with DCM
  3. dry with materialThe combined organic fractions were dried (Na2SO4)
  4. concentrationconcentrated
  5. custompurified via column chromatography (silica, hexanes/EtOAc, 2:1)

Sources & evidence

ORD record
ord-f7b97f20354149a8b0f33230ecf33809
Source dataset
uspto-grants-2012_09
Patent number
US08273782B2

Reaction notes

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