Triethylsilane → HCID 57435099, compound

HRID 1724771Notes

Reaction equation

HRID 1724771 reaction equation
C([SiH](CC)CC)C.[CH2:8]([O:10][C:11]([C:13]1[NH:14][CH:15]=[C:16]([C:18](=O)[CH2:19][C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][C:21]=2[Br:26])[CH:17]=1)=[O:12])[CH3:9]>FC(F)(F)C(O)=O>[CH2:8]([O:10][C:11]([C:13]1[NH:14][CH:15]=[C:16]([CH2:18][CH2:19][C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][C:21]=2[Br:26])[CH:17]=1)=[O:12])[CH3:9]

Participants

4

Reactant 2

HCID 12052TriethylsilaneHCID 57435098HCID 57435098, compound

Product 1

HCID 57435099HCID 57435099, compoundYield 57.3%

Reagents, catalysts & solvents 1

HCID 6422Trifluoroacetic acidSolvent

Procedure

Triethylsilane (2.25 mL, 14.1 mmol) was added to a stirring, room temperature solution of 63 (1.5291 g, 4.55 mmol) in trifluoroacetic acid (TFA) (10.8 mL, 0.42 M) under N2. After stirring at room temperature for 3 hours, the reaction was heated to 35° C. for 35 min, then the TFA was removed under vacuum, and the crude product was taken up in EtOAc, washed with brine, dried with Na2SO4, filtered, concentrated, and purified by preparative reverse phase HPLC with the following conditions: 0 to 12 min, 35:65 H2O:CH3CN; 14-15 min, 35:65 to 0: 100 H2O:CH3CN; 20 mL/min.; λ=254 nM; 3.67 g/mL, 0.2 mL/ injection. 0.8402 g (57.3%) of 64 was obtained as a fluffy white solid. (Note: An undesired impurity has a retention time of 12.281 min by HPLC.) 1H (CDCl3, 400 MHz): δ 9.07 (1H, broad s), 7.55 (1H, dd, J=8.0, 1.3 Hz), 7.21 (1H, td, J=7.3, 1.3 Hz), 7.17 (1H, dd, J=7.6, 2.4 Hz), 7.06 (1H, ddd, J=7.9, 7.0, 2.3 Hz), 6.82 (1H, s), 6.72 (1H, s), 4.32 (2H, t, J=7.2 Hz), 2.99 (2H, t, J=8.0 Hz), 2.78 (2H, t, J=7.9Hz), 1.36 (3H, t, J=7.2 Hz) ppm. 13C (CDCl3, 100 MHz): δ 161.21, 141.03, 132.75, 130.41, 127.63, 127.32, 125.31, 124.43, 122.66, 120.68, 114.83, 60.22, 37.78, 27.03, 14.48 ppm. DEPT (CDCl3, 100 MHz): CH3 carbons: 14.48; CH2 carbons: 60.22, 37.78, 27.03; CH carbons: 132.75, 130.41, 127.63, 127.32, 120.68, 114.83 ppm. HPLC: 11.355 min.

Workup

  1. temperaturethe reaction was heated to 35° C. for 35 min
  2. customthe TFA was removed under vacuum
  3. washwashed with brine
  4. dry with materialdried with Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated
  7. custompurified by preparative reverse phase HPLC with the following conditions
  8. custom0 to 12 min, 35:65 H2O
  9. custom14-15 min, 35:65

Sources & evidence

ORD record
ord-d443f842b14446f6bd15f3bc3c1dcdab
Source dataset
uspto-grants-2009_02
Patent number
US07488747B2

Reaction notes

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