Triphenylphosphine → ethyl 2-[4-[((3S)-1-tert-butoxycarbonyl-3-pyrrolidinyl)thio]phenyl]acetate

HRID 53980Notes

Reaction equation

HRID 53980 reaction equation
[SH:1][C:2]1[CH:7]=[CH:6][C:5]([CH2:8][C:9]([O:11][CH2:12][CH3:13])=[O:10])=[CH:4][CH:3]=1.[C:14]([O:18][C:19]([N:21]1[CH2:25][CH2:24][C@@H:23](O)[CH2:22]1)=[O:20])([CH3:17])([CH3:16])[CH3:15].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O>O1CCCC1>[C:14]([O:18][C:19]([N:21]1[CH2:25][CH2:24][C@H:23]([S:1][C:2]2[CH:3]=[CH:4][C:5]([CH2:8][C:9]([O:11][CH2:12][CH3:13])=[O:10])=[CH:6][CH:7]=2)[CH2:22]1)=[O:20])([CH3:17])([CH3:15])[CH3:16]

Participants

6

Reactant 4

HCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 6544479tert-Butyl (3R)-3-hydroxypyrrolidine-1-carboxylateHCID 123300434-Mercapto-phenyl-acetic acid ethyl ester

Product 1

HCID 57063129ethyl 2-[4-[((3S)-1-tert-butoxycarbonyl-3-pyrrolidinyl)thio]phenyl]acetateYield 18.6%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

20.2 g of ethyl 4-mercaptophenylacetate was dissolved in 450 ml of tetrahydrofuran. With ice cooling and with stirring, 21.0 g of (3R)-1-tert-butoxycarbonyl-3-hydroxypyrrolidine, 29.4 g of triphenylphosphine and 19.5 g of diethyl azodicarboxylate were added to the above solution. The thus prepared mixture was stirred at room temperature for 18 hours. After distilling off the solvent, the resulting residue was purified by subjecting it to silica gel column chromatography using a n-hexane/ethyl acetate mixture as an elution solvent, thereby obtaining 7.0 g of ethyl 2-[4-[((3S)-1-tert-butoxycarbonyl-3-pyrrolidinyl)thio]phenyl]acetate.

Workup

  1. stirringThe thus prepared mixture was stirred at room temperature for 18 hours
  2. distillationAfter distilling off the solvent
  3. customthe resulting residue was purified

Sources & evidence

ORD record
ord-d20234f951904d76b671f58a88354903
Source dataset
uspto-grants-1997_04
Patent number
US05620991

Reaction notes

Loading…