Trifluoroacetic acid → {5-Hydroxy-4-[(phenylmethyl)oxy]-2-pyridinyl}methyl acetate trifluoroacetate salt

HRID 2233184Notes

Reaction equation

HRID 2233184 reaction equation
[C:1]([O:4][CH2:5][C:6]1[CH:11]=[C:10]([O:12][CH2:13][C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)[C:9]([O:20]CC2C=CC(OC)=CC=2)=[CH:8][N:7]=1)(=[O:3])[CH3:2].C1(P(=O)(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C([SiH](CC)CC)C.[F:57][C:58]([F:63])([F:62])[C:59]([OH:61])=[O:60]>ClCCl>[F:57][C:58]([F:63])([F:62])[C:59]([OH:61])=[O:60].[C:1]([O:4][CH2:5][C:6]1[CH:11]=[C:10]([O:12][CH2:13][C:14]2[CH:15]=[CH:16][CH:17]=[CH:18][CH:19]=2)[C:9]([OH:20])=[CH:8][N:7]=1)(=[O:3])[CH3:2]

Participants

6

Reactant 4

HCID 6422Trifluoroacetic acidHCID 12052TriethylsilaneHCID 13097Triphenylphosphine OxideHCID 67526761{5-({[4-(Methyloxy)phenyl]methyl}oxy)-4-[(phenylmethyl)oxy]-2-pyridinyl}methyl acetate

Product 1

HCID 67527752{5-Hydroxy-4-[(phenylmethyl)oxy]-2-pyridinyl}methyl acetate trifluoroacetate salt

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

A solution of {5-({[4-(methyloxy)phenyl]methyl}oxy)-4-[(phenyl methyl)oxy]-2-pyridinyl}methyl acetate (containing triphenylphosphine oxide as an impurity) (20 g, 50.8 mmol) in dichloromethane (500 ml) was treated with triethylsilane (10 ml, 62.6 mmol). A solution of trifluoroacetic acid (35 ml, 0.45 mol) in dichloromethane (200 ml) was added over 1 hour. After 2 hours the mixture was evaporated and chromatographed on silica gel eluting with 50-100% ethyl acetate-hexane, then 5-10% methanol-DCM affording a solid, the TFA salt in a 1:1 mixture with triphenylphosphine oxide (8.33 g).

Workup

  1. customAfter 2 hours the mixture was evaporated
  2. customchromatographed on silica gel eluting with 50-100% ethyl acetate-hexane

Sources & evidence

ORD record
ord-274abda7f633454e8c259a139944d113
Source dataset
uspto-grants-2010_05
Patent number
US07709483B2

Reaction notes

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