Dibutyltin oxide → {3-Methyl-5-[4'-(2H-tetrazol-5-ylmethyl)-biphenyl-4-yl]-isoxazol-4-yl}-carbamic acid (R)-1-(2-fluoro-phenyl)-ethyl ester

HRID 2092454Notes

Reaction equation

HRID 2092454 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C@H:8]([O:10][C:11](=[O:34])[NH:12][C:13]1[C:14]([CH3:33])=[N:15][O:16][C:17]=1[C:18]1[CH:23]=[CH:22][C:21]([C:24]2[CH:29]=[CH:28][C:27]([CH2:30][C:31]#[N:32])=[CH:26][CH:25]=2)=[CH:20][CH:19]=1)[CH3:9].C([Sn](=O)CCCC)CCC.[N:45]([Si](C)(C)C)=[N+:46]=[N-:47]>C1(C)C=CC=CC=1>[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C@H:8]([O:10][C:11](=[O:34])[NH:12][C:13]1[C:14]([CH3:33])=[N:15][O:16][C:17]=1[C:18]1[CH:23]=[CH:22][C:21]([C:24]2[CH:25]=[CH:26][C:27]([CH2:30][C:31]3[N:45]=[N:46][NH:47][N:32]=3)=[CH:28][CH:29]=2)=[CH:20][CH:19]=1)[CH3:9]

Participants

5

Reactant 3

HCID 61221Dibutyltin oxideHCID 78378AzidotrimethylsilaneHCID 46239205[5-(4'-Cyanomethyl-biphenyl-4-yl)-3-methyl-isoxazol-4-yl]-carbamic acid (R)-1-(2-fluoro-phenyl)-ethyl ester

Product 1

HCID 46239204{3-Methyl-5-[4'-(2H-tetrazol-5-ylmethyl)-biphenyl-4-yl]-isoxazol-4-yl}-carbamic acid (R)-1-(2-fluoro-phenyl)-ethyl ester

Reagents, catalysts & solvents 1

HCID 1140TolueneSolvent

Conditions

Temperature
100 °C

Procedure

To a solution of [5-(4′-cyanomethyl-biphenyl-4-yl)-3-methyl-isoxazol-4-yl]-carbamic acid (R)-1-(2-fluoro-phenyl)-ethyl ester (0.200 g, 0.44 mmol) in toluene (5 mL) was added dibutyltin oxide (0.011 g, 0.04 mmol), followed by azidotrimethylsilane (0.07 mL, 0.53 mmol), and the reaction was stirred at 100° C. for 5 hours, and then stirred at room temperature overnight. The mixture was concentrated, and the residue was dissolved in EtOAc and washed with water and brine. The organic layer was dried and concentrated, and the crude material was purified by preparative HPLC to give the title compound.

Workup

  1. stirringstirred at room temperature overnight
  2. concentrationThe mixture was concentrated
  3. dissolutionthe residue was dissolved in EtOAc
  4. washwashed with water and brine
  5. customThe organic layer was dried
  6. concentrationconcentrated
  7. customthe crude material was purified by preparative HPLC

Sources & evidence

ORD record
ord-be1da55684e34c85a1e0751e6cedda0c
Source dataset
uspto-grants-2013_05
Patent number
US08440707B2

Reaction notes

Loading…