Trifluoroacetic acid → 2(R)-[(3,4-methylendioxybenzyl)-(2,6-dimethyl-4-methoxybenzenesulfonyl)amino]-3-[(2-pyrrol-1-yl)phenylcarbonylamino]-propionic acid

HRID 2298007Notes

Reaction equation

HRID 2298007 reaction equation
C([O:5][C:6](=[O:47])[C@H:7]([N:23]([CH2:37][C:38]1[CH:43]=[CH:42][C:41]2[O:44][CH2:45][O:46][C:40]=2[CH:39]=1)[S:24]([C:27]1[C:32]([CH3:33])=[CH:31][C:30]([O:34][CH3:35])=[CH:29][C:28]=1[CH3:36])(=[O:26])=[O:25])[CH2:8][NH:9][C:10]([C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][C:13]=1[N:18]1[CH:22]=[CH:21][CH:20]=[CH:19]1)=[O:11])(C)(C)C.FC(F)(F)C(O)=O>FC(F)(F)C(O)=O.C(Cl)Cl>[CH2:45]1[O:44][C:41]2[CH:42]=[CH:43][C:38]([CH2:37][N:23]([S:24]([C:27]3[C:32]([CH3:33])=[CH:31][C:30]([O:34][CH3:35])=[CH:29][C:28]=3[CH3:36])(=[O:25])=[O:26])[C@H:7]([CH2:8][NH:9][C:10]([C:12]3[CH:17]=[CH:16][CH:15]=[CH:14][C:13]=3[N:18]3[CH:19]=[CH:20][CH:21]=[CH:22]3)=[O:11])[C:6]([OH:47])=[O:5])=[CH:39][C:40]=2[O:46]1

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 69762802tert-butyl-2(R)-[(3,4-methylendioxybenzyl)-(2,6-dimethyl-4-methoxybenzenesulfonyl)amino]-3-[(2-pyrrol-1-yl)phenylcarbonylamino]-propionate

Product 1

HCID 183375482(R)-[(3,4-methylendioxybenzyl)-(2,6-dimethyl-4-methoxybenzenesulfonyl)amino]-3-[(2-pyrrol-1-yl)phenylcarbonylamino]-propionic acidYield 113.8%

Reagents, catalysts & solvents 1

HCID 21863450Trifluoroacetic acid methylene chlorideSolvent

Procedure

A solution of tert-butyl-2(R)-[(3,4-methylendioxybenzyl)-(2,6-dimethyl-4-methoxybenzenesulfonyl)amino]-3-[(2-pyrrol-1-yl)phenylcarbonylamino]-propionate (915 mg, 1.3 mmol) in 20% trifluoracetic acid-methylene chloride (15 ml) was stirred for 1 hour. Extra trifluoroacetic acid (0.5 ml) was added and stirring continued for 1.5 hours. The material was then condensed on the rotary evaporator and the residue was taken up in toluene (40 ml) and again condensed. This procedure was repeated twice (2×40 ml toluene, to remove traces of trifluoracetic acid) to provide 2(R)-[(3,4-methylendioxybenzyl)-(2,6-dimethyl-4-methoxybenzenesulfonyl)amino]-3-[(2-pyrrol-1-yl)phenylcarbonylamino]-propionic acid as a golden tan solid (896 mg).

Workup

  1. customcondensed
  2. customon the rotary evaporator
  3. customagain condensed
  4. custom(2×40 ml toluene, to remove traces of trifluoracetic acid)

Sources & evidence

ORD record
ord-aaf43d247faa49fe8870a29042204002
Source dataset
uspto-grants-2002_12
Patent number
US06492394B1

Reaction notes

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