Hydrochloric Acid → 2-(4-(4-chloro-1H-imidazol-1-yl)-3-methoxyphenylamino)-4-(4-fluorophenyl)-4,5-dihydrobenzo[d]thiazol-6(7H)-one

HRID 1803264Notes

Reaction equation

HRID 1803264 reaction equation
[Cl:1][C:2]1[N:3]=[CH:4][N:5]([C:7]2[CH:12]=[CH:11][C:10]([NH:13][C:14]3[S:15][C:16]4[CH2:26][C:21]5(OCC[O:22]5)[CH2:20][CH:19]([C:27]5[CH:32]=[CH:31][C:30]([F:33])=[CH:29][CH:28]=5)[C:17]=4[N:18]=3)=[CH:9][C:8]=2[O:34][CH3:35])[CH:6]=1.Cl>CC(C)=O>[Cl:1][C:2]1[N:3]=[CH:4][N:5]([C:7]2[CH:12]=[CH:11][C:10]([NH:13][C:14]3[S:15][C:16]4[CH2:26][C:21](=[O:22])[CH2:20][CH:19]([C:27]5[CH:32]=[CH:31][C:30]([F:33])=[CH:29][CH:28]=5)[C:17]=4[N:18]=3)=[CH:9][C:8]=2[O:34][CH3:35])[CH:6]=1

Participants

4

Reactant 2

HCID 313Hydrochloric AcidHCID 46864555N-(4-(4-chloro-1H-imidazol-1-yl)-3-methoxyphenyl)-4-(4-fluorophenyl)-5,7-dihydro-4H-spiro[benzo[d]thiazole-6,2'-[1,3]dioxolan]-2-amine

Product 1

HCID 581100012-(4-(4-chloro-1H-imidazol-1-yl)-3-methoxyphenylamino)-4-(4-fluorophenyl)-4,5-dihydrobenzo[d]thiazol-6(7H)-one

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent

Procedure

A mixture of N-(4-(4-chloro-1H-imidazol-1-yl)-3-methoxyphenyl)-4-(4-fluorophenyl)-5,7-dihydro-4H-spiro[benzo[d]thiazole-6,2′-[1,3]dioxolan]-2-amine (54 mg, 0.105 mmol, example 74), aqueous 1.0 M HCl (0.16 mL), and acetone (0.13 mL) was heated at reflux for 24 h. Partial conversion of the starting material to the desired product was evident by LCMS analysis of a crude aliquot. An additional portion of aqueous 1.0 M HCl (0.20 mL) was added and the acetone was removed in vacuo. The resulting mixture was heated at 75° C. for an additional 24 h. The crude reaction was quenced with saturated sodium bicarbonate solution and extracted with EtOAc. The organic layer was concentrated in vacuo. The crude product was purified using preparatory TLC (50% acetone/hexanes) to give 22 mg (43% yield) of the titled compound as an oil. LC-MS (M+H)+ 469.2. 1H NMR (400 MHz, chloroform-d) δ ppm 7.54 (d, J=1.51 Hz, 1 H) 7.46 (d, J=2.52 Hz, 1 H) 7.09-7.20 (m, 3 H) 6.94-7.07 (m, 3 H) 6.77 (dd, J=8.44, 2.39 Hz, 1 H) 4.46 (t, J=6.42 Hz, 1 H) 3.63-3.67 (m, 2 H) 3.62 (s, 3 H) 3.08 (dd, J=14.35, 6.55 Hz, 1 H) 2.86 (dd, J=14.23, 6.42 Hz, 1 H).

Workup

  1. temperaturewas heated
  2. temperatureat reflux for 24 h

Sources & evidence

ORD record
ord-775df72ce9464490b6a73d7b2b69d954
Source dataset
uspto-grants-2013_01
Patent number
US08349880B2

Reaction notes

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