Trifluoroacetic acid → HCID 20823149, compound

HRID 585294Notes

Reaction equation

HRID 585294 reaction equation
[CH2:1]([O:3][C:4](=[O:34])[C:5]([CH3:33])([O:22][C:23]1[CH:24]=[C:25]2[C:30](=[CH:31][CH:32]=1)[N:29]=[CH:28][CH:27]=[CH:26]2)[CH:6]([C:8]1[CH:13]=[CH:12][C:11]([O:14][CH2:15][C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)=[CH:10][CH:9]=1)O)[CH3:2].FC(F)(F)C(O)=O.C([SiH](CC)CC)C>ClC(Cl)C.CCOCC>[CH2:1]([O:3][C:4](=[O:34])[C:5]([CH3:33])([O:22][C:23]1[CH:24]=[C:25]2[C:30](=[CH:31][CH:32]=1)[N:29]=[CH:28][CH:27]=[CH:26]2)[CH2:6][C:8]1[CH:9]=[CH:10][C:11]([O:14][CH2:15][C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)=[CH:12][CH:13]=1)[CH3:2]

Participants

6

Reactant 3

HCID 6422Trifluoroacetic acidHCID 12052TriethylsilaneHCID 69314775HCID 69314775, compound

Product 1

HCID 20823149HCID 20823149, compoundYield 86%

Reagents, catalysts & solvents 2

HCID 3283Diethyl EtherSolventHCID 63651,1-DichloroethaneSolvent

Procedure

To a LDA solution (42 mL, 1.5 M solution in THF) in 65 mL of dry THF at −78° C., a solution of 2-(quinolin-6-yloxy)-propionic acid ethyl ester (8.61 g, 0.035 mol) in 65 mL of dry THF was cannulated in. The resulting solution is allowed to stand at −78° C. for 3 min. Solid 4-benzyloxybenzaldehyde (6.71 g, 0.032 mol) was added and resulting mixture was allowed to stand at −78° C. for 5 min until all solid dissovled in the solution. Reaction was then quenched with AcOH (6.03 mL, 0.105 mol) in 60 mL of THF at −78° C. The mixture was then diluted with Et2O and washed with sat'NH4Cl, water and brine, dried over Na2SO4, filtered and concentrated. The crude material was purified by chromatography to give 3-(4-benzyloxy-phenyl)-3-hydroxy-2-methyl-2-(quinolin-6-yloxy)-propionic acid ethyl ester in 86% yield. A of solution of 2.75 g of give 3-(4-benzyloxy-phenyl)-3-hydroxy-2-methyl-2-(quinolin-6-yloxy)-propionic acid ethyl ester (6.01 mmol), trifluoroacetic acid (2.8 mL, 36.1 mmol), triethylsilane (5.8 mL, 36.1 mmol) in 80 mL of dichloroethane was heated to reflux for 50 h. The mixture was cooled to r.t. and diluted with Et2O and washed with sat′ NaHCO3, water and brine. Organic layer was dried over Mg SO4, filtered and concentrated. Residue was purified by chromatography (5% MeOH in CH2Cl2) to give 86% of title compound as light yellow oil. 1H NMR (400 MHz, CDCl3) δδ 8.78 (dd, 1H, J=4.4, 1.6 Hz), 8.00 (d, 1H, J=9.2 Hz), 7.98 (d, 1H, J=8.8 Hz), 7.45-7.32 (m, 7H), 7.19 (d, 2H, J=8.8 Hz), 7.04 (d, 1H, J=3.2 Hz), 6.93 (d, 2H, J=8.8 Hz), 5.06 (s, 2H), 4.23 (q, 2H, J=7.1 Hz), 3.38, 3.18 (ABq, 2H, J=13.8 Hz), 1.53 (s, 3H), 1.19 (t, 3H, J=7.1 Hz). MS (ES+) m/z mass calcd for C28H28NO4 (m+1) 442, found 442.

Workup

  1. temperatureto reflux for 50 h
  2. washwashed
  3. dry with materialOrganic layer was dried over Mg SO4
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customResidue was purified by chromatography (5% MeOH in CH2Cl2)

Sources & evidence

ORD record
ord-9cf24b045f22434dad775e7b7ed8ddb8
Source dataset
uspto-grants-2005_08
Patent number
US06930120B2

Reaction notes

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