p-Toluenesulfonic acid monohydrate → HCID 19704095, compound

HRID 233701Notes

Reaction equation

HRID 233701 reaction equation
CO[C:3](=[O:23])[CH:4]([CH2:16][C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1)[NH:5][C:6]([NH:8][C:9]1[S:10][CH:11]=[C:12]([C:14]#[N:15])[N:13]=1)=[S:7].O.C1(C)C=CC(S(O)(=O)=O)=CC=1>C1(C)C=CC=CC=1>[C:14]([C:12]1[N:13]=[C:9]([N:8]2[C:3](=[O:23])[CH:4]([CH2:16][C:17]3[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=3)[NH:5][C:6]2=[S:7])[S:10][CH:11]=1)#[N:15]

Participants

4

Reactant 2

HCID 521998p-Toluenesulfonic acid monohydrateHCID 19703789HCID 19703789, compound

Product 1

HCID 19704095HCID 19704095, compoundYield 13.2%

Reagents, catalysts & solvents 1

HCID 1140TolueneSolvent

Procedure

A solution of N-[[(4-cyano-2-thiazolyl)amino]thioxomethyl]-DL-phenylalanine methyl ester (1.42 g, 4.10 mmol) and p-toluene sulfonic acid hydrate (0.20 g 1.05 mmol) in toluene (80 mL) was refluxed with a Dean-Stark trap for 24 h. The reaction was cooled to room temperature, solvent removed under reduced pressure, residue taken up in ethyl acetate, washed with saturated sodium bicarbonate and saturated sodium chloride, dried over magnesium sulfate, and concentrated under reduced pressure. The resulting product was recrystallized from ethyl ether-hexanes to provide 170.1 mg (10%) of the titled product:

Workup

  1. customsolvent removed under reduced pressure, residue
  2. washwashed with saturated sodium bicarbonate and saturated sodium chloride
  3. dry with materialdried over magnesium sulfate
  4. concentrationconcentrated under reduced pressure
  5. customThe resulting product was recrystallized from ethyl ether-hexanes

Sources & evidence

ORD record
ord-ceac218dc4844826996bc2f00c4ebaf4
Source dataset
uspto-grants-1997_01
Patent number
US05593993

Reaction notes

Loading…