Sulfuryl chloride → N-((1R,2R)-2-chlorocyclohexyl)-6-((6-fluoro-3H-imidazo[4,5-b]pyridin-3-yl)methyl)benzo[d]thiazol-2-amine

HRID 1848234Notes

Reaction equation

HRID 1848234 reaction equation
[F:1][C:2]1[CH:3]=[C:4]2[N:10]=[CH:9][N:8]([CH2:11][C:12]3[CH:28]=[CH:27][C:15]4[N:16]=[C:17]([NH:19][C@@H:20]5[CH2:25][CH2:24][CH2:23][CH2:22][C@@H:21]5O)[S:18][C:14]=4[CH:13]=3)[C:5]2=[N:6][CH:7]=1.CCN(C(C)C)C(C)C.S(Cl)([Cl:41])(=O)=O>C(Cl)Cl>[Cl:41][C@@H:21]1[CH2:22][CH2:23][CH2:24][CH2:25][C@H:20]1[NH:19][C:17]1[S:18][C:14]2[CH:13]=[C:12]([CH2:11][N:8]3[C:5]4=[N:6][CH:7]=[C:2]([F:1])[CH:3]=[C:4]4[N:10]=[CH:9]3)[CH:28]=[CH:27][C:15]=2[N:16]=1

Participants

5

Reactant 3

HCID 24648Sulfuryl chlorideHCID 81531DiisopropylethylamineHCID 86681159(1S,2R)-2-((6-((6-fluoro-3H-imidazo[4,5-b]pyridin-3-yl)methyl)benzo[d]thiazol-2-yl)amino)cyclohexanol

Product 1

HCID 86681205N-((1R,2R)-2-chlorocyclohexyl)-6-((6-fluoro-3H-imidazo[4,5-b]pyridin-3-yl)methyl)benzo[d]thiazol-2-amineYield 10%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a stirred mixture of (1S,2R)-2-((6-((6-fluoro-3H-imidazo[4,5-b]pyridin-3-yl)methyl)benzo[d]thiazol-2-yl)amino)cyclohexanol (282 mg, 0.7 mmol) from Example 162, DIEA (247 μL, 1.4 mmol), and CH2Cl2 (15 mL) at 0° C. under argon was added sulfuryl chloride (142 mg, 2.0 mmol). The mixture was warmed to rt and stirred for 15 h, and then stirred at 60° C. for 15 h. The mixture was cooled to rt and purified directly by reverse-phase preparative HPLC using a mixture of water (5% CH3CN, 0.05% HCOOH) and CH3CN (0.05% HCOOH) as the mobile phase and Varian Pursuit XRs C18 column as the stationary phase. The product was further purified by triturating in CH2Cl2 (5 mL) to afford N-((1R,2R)-2-chlorocyclohexyl)-6-((6-fluoro-3H-imidazo[4,5-b]pyridin-3-yl)methyl)benzo[d]thiazol-2-amine (29 mg, 10%) as a white solid. 1H NMR (500 MHz, CDCl3) δ 8.68 (s, 1H), 8.41 (s, 1H), 8.24 (d, J=8.4 Hz, 1H), 8.07 (dd, J=2.6, 9.5 Hz, 1H), 7.68 (s, 1H), 7.33 (d, J=8.4 Hz, 1H), 7.24 (dd, J=1.4, 8.2 Hz, 1H), 5.48 (s, 2H), 4.02 (m, 1H), 3.87 (m, 1H), 2.20 (m, 1H), 2.07 (m, 1H), 1.63-1.75 (m, 3H), 1.29-1.41 (m, 3H); LCMS (ESI) m/z 416 (M+H)+.

Workup

  1. stirringstirred at 60° C. for 15 h
  2. temperatureThe mixture was cooled to rt
  3. custompurified directly by reverse-phase preparative HPLC
  4. additiona mixture of water (5% CH3CN, 0.05% HCOOH) and CH3CN (0.05% HCOOH) as the mobile phase and Varian Pursuit XRs C18 column as the stationary phase
  5. customThe product was further purified
  6. customby triturating in CH2Cl2 (5 mL)

Sources & evidence

ORD record
ord-242ac6110b2643f2bb9728929364c08b
Source dataset
uspto-grants-2015_02
Patent number
US08952058B2

Reaction notes

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