Acetyl chloride → tert-butyl acetyl(5-(5-chloro-2-(4-(N-(2,4-dimethoxybenzyl)-N-(1,2,4-thiadiazol-5-yl)sulfamoyl)-2,5-difluorophenoxy)phenyl)benzo[d]isoxazol-3-yl)carbamate

HRID 2203465Notes

Reaction equation

HRID 2203465 reaction equation
[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([O:25][C:26]2[CH:31]=[C:30]([F:32])[C:29]([S:33](=[O:52])(=[O:51])[N:34]([CH2:40][C:41]3[CH:46]=[CH:45][C:44]([O:47][CH3:48])=[CH:43][C:42]=3[O:49][CH3:50])[C:35]3[S:39][N:38]=[CH:37][N:36]=3)=[CH:28][C:27]=2[F:53])=[C:6]([C:8]2[CH:9]=[CH:10][C:11]3[O:15][N:14]=[C:13]([NH:16][C:17](=[O:23])[O:18][C:19]([CH3:22])([CH3:21])[CH3:20])[C:12]=3[CH:24]=2)[CH:7]=1.C(N(CC)CC)C.[C:61](Cl)(=[O:63])[CH3:62]>CN(C)C1C=CN=CC=1.ClCCl.C(OCC)(=O)C>[C:61]([N:16]([C:13]1[C:12]2[CH:24]=[C:8]([C:6]3[CH:7]=[C:2]([Cl:1])[CH:3]=[CH:4][C:5]=3[O:25][C:26]3[CH:31]=[C:30]([F:32])[C:29]([S:33](=[O:52])(=[O:51])[N:34]([CH2:40][C:41]4[CH:46]=[CH:45][C:44]([O:47][CH3:48])=[CH:43][C:42]=4[O:49][CH3:50])[C:35]4[S:39][N:38]=[CH:37][N:36]=4)=[CH:28][C:27]=3[F:53])[CH:9]=[CH:10][C:11]=2[O:15][N:14]=1)[C:17](=[O:23])[O:18][C:19]([CH3:20])([CH3:22])[CH3:21])(=[O:63])[CH3:62]

Participants

7

Reactant 3

HCID 6367Acetyl chlorideHCID 8471TriethylamineHCID 71558770tert-butyl (5-(5-chloro-2-(4-(N-(2,4-dimethoxybenzyl)-N-(1,2,4-thiadiazol-5-yl)sulfamoyl)-2,5-difluorophenoxy)phenyl)benzo[d]isoxazol-3-yl)carbamate

Product 1

HCID 90389189tert-butyl acetyl(5-(5-chloro-2-(4-(N-(2,4-dimethoxybenzyl)-N-(1,2,4-thiadiazol-5-yl)sulfamoyl)-2,5-difluorophenoxy)phenyl)benzo[d]isoxazol-3-yl)carbamateYield 35%

Reagents, catalysts & solvents 3

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolventHCID 8857Ethyl AcetateSolvent

Procedure

A solution of tert-butyl (5-(5-chloro-2-(4-(N-(2,4-dimethoxybenzyl)-N-(1,2,4-thiadiazol-5-yl)sulfamoyl)-2,5-difluorophenoxy)phenyl)benzo[d]isoxazol-3-yl)carbamate (0.20 g, 0.25 mmol), triethylamine (105 μL, 0.75 mmol) and 4-(dimethylamino)pyridine (0.030 g, 0.25 mmol) in dichloromethane (20 mL) at 0° C. was treated with acetyl chloride (36 μL, 0.5 mmol). The resulting solution was stirred for 1 h. The reaction mixture was diluted with ethyl acetate (70 mL), washed with saturated ammonium chloride (2×50 mL) and brine (50 mL), dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. The residue was purified by reverse phase HPLC to afford tert-butyl acetyl(5-(5-chloro-2-(4-(N-(2,4-dimethoxybenzyl)-N-(1,2,4-thiadiazol-5-yl)sulfamoyl)-2,5-difluorophenoxy)phenyl)benzo[d]isoxazol-3-yl)carbamate as a colourless solid in 35% yield (0.05 g): 1H NMR (300 MHz, CDCl3) δ 8.15 (s, 1H), 7.68-7.63 (, m, 1H), 7.63-7.58 (m, 1H), 7.56-7.54 (m, 1H), 7.50-7.45 (m, 2H), 7.42-7.38 (m, 1H), 7.15-7.10 (m, 1H), 7.03-6.99 (m, 1H), 6.33-6.25 (m, 2H),6.19-6.17 (m, 1H), 3.72 (s, 3H), 3.63 (s, 3H), 2.67 (s, 3H), 1.31 (s, 9H); MS (ES+) m/z 727.5 (M−100), 729.7 (M−100).

Workup

  1. washwashed with saturated ammonium chloride (2×50 mL) and brine (50 mL)
  2. dry with materialdried over anhydrous sodium sulfate
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo
  5. customThe residue was purified by reverse phase HPLC

Sources & evidence

ORD record
ord-86a8ae08d3bf43d7a383edaa10eeedc9
Source dataset
uspto-grants-2016_06
Patent number
US09365578B2

Reaction notes

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