Trifluoroacetic acid → 1-(4-(5-(4-Propyl-5-(pyridin-2-yl)isoxazol-3-yl)-1,2,4-oxadiazol-3-yl)benzyl)azetidine-3-carboxylic acid trifluoroacetic acid salt

HRID 1951943Notes

Reaction equation

HRID 1951943 reaction equation
[CH2:1]([C:4]1[C:5]([C:15]2[O:19][N:18]=[C:17]([C:20]3[CH:37]=[CH:36][C:23]([CH2:24][N:25]4[CH2:28][CH:27]([C:29]([O:31]C(C)(C)C)=[O:30])[CH2:26]4)=[CH:22][CH:21]=3)[N:16]=2)=[N:6][O:7][C:8]=1[C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][N:10]=1)[CH2:2][CH3:3].[F:38][C:39]([F:44])([F:43])[C:40]([OH:42])=[O:41]>ClCCl>[F:38][C:39]([F:44])([F:43])[C:40]([OH:42])=[O:41].[CH2:1]([C:4]1[C:5]([C:15]2[O:19][N:18]=[C:17]([C:20]3[CH:37]=[CH:36][C:23]([CH2:24][N:25]4[CH2:28][CH:27]([C:29]([OH:31])=[O:30])[CH2:26]4)=[CH:22][CH:21]=3)[N:16]=2)=[N:6][O:7][C:8]=1[C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][N:10]=1)[CH2:2][CH3:3]

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 66678195Tert-butyl 1-(4-(5-(4-propyl-5-(pyridin-2-yl)isoxazol-3-yl)-1,2,4-oxadiazol-3-yl)benzyl)azetidine-3-carboxylate

Product 1

HCID 666781651-(4-(5-(4-Propyl-5-(pyridin-2-yl)isoxazol-3-yl)-1,2,4-oxadiazol-3-yl)benzyl)azetidine-3-carboxylic acid trifluoroacetic acid salt

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

A solution of tert-butyl 1-(4-(5-(4-propyl-5-(pyridin-2-yl)isoxazol-3-yl)-1,2,4-oxadiazol-3-yl)benzyl)azetidine-3-carboxylate in dichloromethane (0.5 mL) and trifluoroacetic acid (0.5 mL) was stirred at room temperature for 30 minutes. The reaction mixture was concentrated to yield 1-(4-(5-(4-propyl-5-(pyridin-2-yl)isoxazol-3-yl)-1,2,4-oxadiazol-3-yl)benzyl)azetidine-3-carboxylic acid trifluoroacetic acid salt (17.4 mg). The compound had an HPLC retention time=7.75 min.—Column: Xbridge Ph 3.5 u 4.6×150 mm; Gradient time: 12 min, hold for 3 minutes; Flow rate=2 ml/min; Solvent A=5% MeCN—95% Water—0.05% TFA; Solvent B=95% MeCN—5% water—0.05% TFA; Start % B=10; Final % B=100. LC-MS: M+1=446+. 1H NMR (500 MHz, MeOD) δ ppm 1.04 (t, 3H), 1.73-1.83 (m, 2H), 3.34-3.40 (m, 2H), 3.73 (t, J=8.25 Hz, 1H), 4.39 (d, J=7.42 Hz, 4H), 4.54 (s, 2H), 7.51 (ddd, J=6.74, 4.67, 2.06 Hz, 1H), 7.70 (d, J=8.25 Hz, 2H), 7.98-8.06 (m, 2H), 8.30 (d, J=8.25 Hz, 2H), and 8.78 (d, J=4.40 Hz, 1H).

Workup

  1. concentrationThe reaction mixture was concentrated

Sources & evidence

ORD record
ord-10a3d466e14d42519dd611ea84966764
Source dataset
uspto-grants-2013_03
Patent number
US08404672B2

Reaction notes

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