Trifluoroacetic acid → 6-({3-[4-(1,3-Thiazol-2-ylcarbonyl)piperazin-1-yl]azetidin-1-yl}carbonyl)-1,2,3,4-tetrahydroisoquinoline

HRID 468117Notes

Reaction equation

HRID 468117 reaction equation
C(OC([N:8]1[CH2:17][CH2:16][C:15]2[C:10](=[CH:11][CH:12]=[C:13]([C:18]([N:20]3[CH2:23][CH:22]([N:24]4[CH2:29][CH2:28][N:27]([C:30]([C:32]5[S:33][CH:34]=[CH:35][N:36]=5)=[O:31])[CH2:26][CH2:25]4)[CH2:21]3)=[O:19])[CH:14]=2)[CH2:9]1)=O)(C)(C)C.FC(F)(F)C(O)=O>C(Cl)Cl>[S:33]1[CH:34]=[CH:35][N:36]=[C:32]1[C:30]([N:27]1[CH2:28][CH2:29][N:24]([CH:22]2[CH2:23][N:20]([C:18]([C:13]3[CH:14]=[C:15]4[C:10](=[CH:11][CH:12]=3)[CH2:9][NH:8][CH2:17][CH2:16]4)=[O:19])[CH2:21]2)[CH2:25][CH2:26]1)=[O:31]

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 596257276-{3-[4-(Thiazole-2-carbonyl)-piperazin-1-yl]-azetidine-1-carbonyl}-3,4-dihydro-1H-isoquinoline-2-carboxylic acid tert-butyl ester

Product 1

HCID 596257876-({3-[4-(1,3-Thiazol-2-ylcarbonyl)piperazin-1-yl]azetidin-1-yl}carbonyl)-1,2,3,4-tetrahydroisoquinolineYield 101.9%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of compound 17c (826 mg, 1.61 mmol) in CH2Cl2 (5 mL) was added trifluoroacetic acid (1 mL) at room temperature. The mixture was stirred at room temperature for 18 h. The mixture was extracted with CH2Cl2, and H2O after basifying the water layer to pH˜8 with 1N aqueous NaOH. The organic solution was dried over Na2SO4 and concentrated. Purification of the residue by flash column chromatography (silica gel, 2% MeOH/EtOAc) gave Cpd 916 (675 mg). 1H NMR (400 MHz, CDCl3): δ 7.88 (d, J=3.3 Hz, 1H), 7.55 (d, J=3.3 Hz, 1H), 7.41 (s, 1H), 7.37 (d, J=8.03 Hz, 1H), 7.05 (d, J=8.3 Hz, 1H), 4.54 (br. s., 1H), 4.44 (br. s., 1H), 4.01-4.35 (m, 6H), 3.75-3.95 (m, 2H), 3.12-3.31 (m, 2H), 2.85 (t, J=5.8 Hz, 1H), 2.49 (br. s., 4H). MS m/z (M+H+) 412.0.

Workup

  1. extractionThe mixture was extracted with CH2Cl2, and H2O
  2. dry with materialThe organic solution was dried over Na2SO4
  3. concentrationconcentrated
  4. customPurification of the residue by flash column chromatography (silica gel, 2% MeOH/EtOAc)

Sources & evidence

ORD record
ord-ab4a99e7a9f1429b89557eae32354372
Source dataset
uspto-grants-2014_01
Patent number
US08623858B2

Reaction notes

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