Triphenylphosphine → HCID 22032581, compound

HRID 1792505Notes

Reaction equation

HRID 1792505 reaction equation
[F:1][C:2]1[CH:7]=[C:6]([S:8][CH3:9])[CH:5]=[CH:4][C:3]=1[OH:10].O[CH:12]1[CH2:17][CH2:16][N:15]([C:18]([O:20][C:21]([CH3:24])([CH3:23])[CH3:22])=[O:19])[CH2:14][CH2:13]1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O>O1CCCC1.O>[F:1][C:2]1[CH:7]=[C:6]([S:8][CH3:9])[CH:5]=[CH:4][C:3]=1[O:10][CH:12]1[CH2:17][CH2:16][N:15]([C:18]([O:20][C:21]([CH3:24])([CH3:23])[CH3:22])=[O:19])[CH2:14][CH2:13]1

Participants

7

Reactant 4

HCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 643502Tert-butyl 4-hydroxypiperidine-1-carboxylateHCID 138818682-Fluoro-4-(methylthio)phenol

Product 1

HCID 22032581HCID 22032581, compoundYield 64.9%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 8028TetrahydrofuranSolvent

Procedure

A solution of 1.01 g 2-fluoro-4-methylsulfanyl phenol (compound in Production Example D088), 1.28 g t-butyl 4-hydroxy-1-piperidinecarboxylate, 2.5 g triphenylphosphine and 4.2 g diethyl azodicarboxylate (40% toluene solution) in anhydrous tetrahydrofuran (30 mL) was heated for 8 hours under reflux in a stream of nitrogen. Water was added thereto, the reaction mixture was extracted with ethyl acetate, and the extract was dried over sodium sulfate and purified by silica gel chromatography (hexane/ethyl acetate) to give 1.41 g t-butyl 4-(2-fluoro-4-methylsulfanylphenoxy)piperidine-1-carboxylate. 5 mL of 4 N hydrogen chloride in ethyl acetate was added to this product and left for 1 hour. The solvent was removed, and the precipitated crystals were washed with ethyl acetate-ether to give 780 mg of the title compound as colorless crystals.

Workup

  1. customwas heated for 8 hours
  2. temperatureunder reflux in a stream of nitrogen
  3. extractionthe reaction mixture was extracted with ethyl acetate
  4. dry with materialthe extract was dried over sodium sulfate
  5. custompurified by silica gel chromatography (hexane/ethyl acetate)

Sources & evidence

ORD record
ord-50f4f6bd9881428ba5ec86cc61370138
Source dataset
uspto-grants-2006_07
Patent number
US07074801B1

Reaction notes

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