Trifluoroacetic acid → HCID 22347604, compound

HRID 897146Notes

Reaction equation

HRID 897146 reaction equation
[N:1]1[C:10]2[NH:9][CH2:8][CH2:7][CH2:6][C:5]=2[CH:4]=[CH:3][C:2]=1[CH2:11][CH2:12][OH:13].C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.[Br:33][C:34]1([Br:50])[CH:36]([C:37]2[CH:42]=[CH:41][C:40](O)=[CH:39][CH:38]=2)[CH:35]1[CH2:44][C:45]([O:47]CC)=[O:46].N(C(OC(C)C)=O)=NC(OC(C)C)=O.C(O)(C(F)(F)F)=O>C1COCC1>[Br:33][C:34]1([Br:50])[CH:36]([C:37]2[CH:42]=[CH:41][C:40]([O:13][CH2:12][CH2:11][C:2]3[CH:3]=[CH:4][C:5]4[CH2:6][CH2:7][CH2:8][NH:9][C:10]=4[N:1]=3)=[CH:39][CH:38]=2)[CH:35]1[CH2:44][C:45]([OH:47])=[O:46]

Participants

7

Reactant 5

HCID 6422Trifluoroacetic acidHCID 11776TriphenylphosphineHCID 75555Diisopropyl diazene-1,2-dicarboxylateHCID 11367331HCID 11367331, compoundHCID 20817475HCID 20817475, compound

Product 1

HCID 22347604HCID 22347604, compoundYield 16.3%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 2-(5,6,7,8-tetrahydro-1,8-naphthyridin-2-yl)-1-ethanol (0.17 g, 0.96 mmol) and polymer bound PPh3 (0.32 g, 0.96 mmol) in dry THF (10 mL) was added ethyl [2,2-dibromo-3-(4-hydroxyphenyl)cyclopropyl]acetate (0.18 g, 0.6 mmol) followed by diisopropyl azodicarboxylate (0.2 mL, 1 mmol). The reaction mixture was stirred at room temperature. After 18 hours, polymer was filtered through Celite and washed with excess THF. Filtrate was concentrated. The concentrated residue in 50% acetonitrile in water (4 mL) was added LiOH (0.14 g). The reaction mixture was stirred 3 hours at room temperature. Reaction mixture was acidified by adding TFA and purified by reverse phase HPLC to afford 50 mg (12%) of desired product. 1H NMR (CD3OD) δ 7.59 (d, 1H, J=7.4 Hz), 7.21 (d, 2H, J=8.6 Hz), 6.88 (d, 2H, J=8.7 Hz), 6.73 (d, 1H, J=7.2 Hz), 4.27 (t, 2H, J=6.0 Hz), 3.49 (t, 2H, J=5.9 Hz), 3.14 (t, 2H, J=5.9 Hz), 2.82-2.78 (m, 3H), 2.71-2.59 (m, 2H), 2.25-2.19 (m, 1H), 1.97-1.90 (m, 2H). HRMS calcd for C21H22N2O3 (M+H): 421.1080. found 421.1069.

Workup

  1. filtrationpolymer was filtered through Celite
  2. washwashed with excess THF
  3. concentrationFiltrate was concentrated
  4. additionThe concentrated residue in 50% acetonitrile in water (4 mL) was added LiOH (0.14 g)
  5. stirringThe reaction mixture was stirred 3 hours at room temperature
  6. customReaction mixture
  7. custompurified by reverse phase HPLC

Sources & evidence

ORD record
ord-645d6e4a1dc743ae939c2310e2a6c0dc
Source dataset
uspto-grants-2005_07
Patent number
US06921767B2

Reaction notes

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