N-Hydroxyphthalimide → HCID 23353087, compound

HRID 2395942Notes

Reaction equation

HRID 2395942 reaction equation
[OH:1][N:2]1[C:6](=[O:7])[C:5]2=[CH:8][CH:9]=[CH:10][CH:11]=[C:4]2[C:3]1=[O:12].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.O[CH2:33][CH2:34][CH2:35][C:36]#[C:37][C:38]1[CH:43]=[CH:42][C:41]([F:44])=[CH:40][CH:39]=1.N(C(OCC)=O)=NC(OCC)=O>O1CCCC1>[F:44][C:41]1[CH:42]=[CH:43][C:38]([C:37]#[C:36][CH2:35][CH2:34][CH2:33][O:1][N:2]2[C:3](=[O:12])[C:4]3=[CH:11][CH:10]=[CH:9][CH:8]=[C:5]3[C:6]2=[O:7])=[CH:39][CH:40]=1

Participants

6

Reactant 4

HCID 10665N-HydroxyphthalimideHCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 189879965-(4-Fluorophenyl)-4-pentyn-1-ol

Product 1

HCID 23353087HCID 23353087, compoundYield 82%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

33.4 g (0.205 mol) of N-hydroxyphthalimide and 53.8 g (0.205 mol) of triphenylphosphine were added to a solution of 33.1 g (0.186 mol) of 5-hydroxy-1-(4-fluorophenyl)-1-pentyne in 430 ml of dry tetrahydrofuran. 35.7 g (0.205 mol) of diethyl azodicarboxylate were then added dropwise inthe course of 2.5 hours under temperature control (not more than 40°C.). Stirring was carried out overnight at room temperature, the mixture was evaporated down under reduced pressure and the residue was taken up with 300 ml of dichloromethane. The solution was washed twice with sodium carbonate solution and once with saturated sodium chloride solution. Afterthe solution had been dried and evaporated down, the crude product was purified by chromatography over silica gel. The eluent used was initially dichloromethane/n-hexane and then pure dichloromethane. Yield: 82%; mp.: 85°-88° C.

Workup

  1. customthe mixture was evaporated down under reduced pressure
  2. washThe solution was washed twice with sodium carbonate solution and once with saturated sodium chloride solution
  3. customAfterthe solution had been dried
  4. customevaporated down
  5. customthe crude product was purified by chromatography over silica gel

Sources & evidence

ORD record
ord-58acb4f3eeaa462bbc01f26bb7c5cb97
Source dataset
uspto-grants-1996_02
Patent number
US05491123

Reaction notes

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