Methyl iodide → (1R,2S,7R,8S)-N-{3-[6-hydroxy-3-(3-methyl-butyl)-4-oxo-3-aza-tricyclo[6.2.1.02,7]undec-5-en-5-yl]-1,1-dioxo-1,4-dihydro-1lambda6-benzo[1,2,4]thiadiazin-7-yl}-N-methyl-methanesulfonamide

HRID 884245Notes

Reaction equation

HRID 884245 reaction equation
[OH:1][C:2]1[C@H:11]2[C@H:6]([C@H:7]3[CH2:12][C@@H:10]2[CH2:9][CH2:8]3)[N:5]([CH2:13][CH2:14][CH:15]([CH3:17])[CH3:16])[C:4](=[O:18])[C:3]=1[C:19]1[NH:24][C:23]2[CH:25]=[CH:26][C:27]([NH:29][S:30]([CH3:33])(=[O:32])=[O:31])=[CH:28][C:22]=2[S:21](=[O:35])(=[O:34])[N:20]=1.[C:36](=O)([O-])[O-].[K+].[K+].IC>CN(C)C=O>[OH:1][C:2]1[C@H:11]2[C@H:6]([C@H:7]3[CH2:12][C@@H:10]2[CH2:9][CH2:8]3)[N:5]([CH2:13][CH2:14][CH:15]([CH3:17])[CH3:16])[C:4](=[O:18])[C:3]=1[C:19]1[NH:24][C:23]2[CH:25]=[CH:26][C:27]([N:29]([CH3:36])[S:30]([CH3:33])(=[O:32])=[O:31])=[CH:28][C:22]=2[S:21](=[O:35])(=[O:34])[N:20]=1

Participants

5

Reactant 3

HCID 6328Methyl iodideHCID 11430Potassium CarbonateHCID 135976563(1R,2S,7R,8S)-N-{3-[6-hydroxy-3-(3-methyl-butyl)-4-oxo-3-aza-tricyclo[6.2.1.02,7]undec-5-en-5-yl]-1,1-dioxo-1,4-dihydro-1lambda6-benzo[1,2,4]thiadiazin-7-yl}-methanesulfonamide

Product 1

HCID 136402454(1R,2S,7R,8S)-N-{3-[6-hydroxy-3-(3-methyl-butyl)-4-oxo-3-aza-tricyclo[6.2.1.02,7]undec-5-en-5-yl]-1,1-dioxo-1,4-dihydro-1lambda6-benzo[1,2,4]thiadiazin-7-yl}-N-methyl-methanesulfonamideYield 56.4%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
25 °C

Procedure

(1R,2S,7R,8S)—N-{3-[6-Hydroxy-3-(3-methyl-butyl)-4-oxo-3-aza-tricyclo[6.2.1.02,7]undec-5-en-5-yl]-1,1-dioxo-1,4-dihydro-1λ6-benzo[1,2,4]thiadiazin-7-yl}-methanesulfonamide (prepared as described in Example 22, 90 mg, 0.172 mmol) was dissolved in anhydrous N,N-dimethylformamide (2 mL). Potassium carbonate (0.04 g, 0.344 mmol) was added followed by iodomethane (0.027 g, 0.189 mmol). The mixture was stirred at 25° C. for 5 h. The reaction mixture was extracted with ethyl acetate (2×100 mL) and water (100 mL). The organic layer was washed with saturated aqueous brine solution (50 mL), dried over sodium sulfate and filtered. The filtrate was concentrated in vacuo to afford the crude product, which was purified by flash column chromatography (Teledyne Isco RediSep column; 40% ethyl acetate in hexanes) to afford the desired product, (1R,2S,7R,8S)—N-{3-[6-hydroxy-3-(3-methyl-butyl)-4-oxo-3-aza-tricyclo[6.2.1.02,7]undec-5-en-5-yl]-1,1-dioxo-1,4-dihydro-1λ6-benzo[1,2,4]thiadiazin-7-yl}-N-methyl-methanesulfonamide (0.052 g, 0.097 mmol, 56.4%), as a white solid. 1H NMR (400 MHz, DMSO-d6) δ: 0.92 (6H, d, J=6.4 Hz), 1.21-1.26 (1H, m), 1.28-1.33 (1H, m), 1.39-1.63 (7H, m), 2.54 (1H, bs), 2.63-2.67 (1H, m), 3.00 (3H, s), 3.06-3.17 (1H, m), 3.29 (3H, s), 3.63-3.72 (2H, m), 7.62 (1H, d, J=8.5 Hz), 7.70-7.73 (1H, m), 7.85 (1H, s). LC-MS (ESI) calcd for C24H32N4O6S2 536.18, found 537.6.6 [M+H+].

Workup

  1. extractionThe reaction mixture was extracted with ethyl acetate (2×100 mL) and water (100 mL)
  2. washThe organic layer was washed with saturated aqueous brine solution (50 mL)
  3. dry with materialdried over sodium sulfate
  4. filtrationfiltered
  5. concentrationThe filtrate was concentrated in vacuo
  6. customto afford the crude product, which
  7. customwas purified by flash column chromatography (Teledyne Isco RediSep column; 40% ethyl acetate in hexanes)

Sources & evidence

ORD record
ord-55decfd78bd747dcabbcfe041e2f4c5f
Source dataset
uspto-grants-2012_08
Patent number
US08236948B2

Reaction notes

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