Pyridine → HCID 46929361, compound

HRID 1753936Notes

Reaction equation

HRID 1753936 reaction equation
[CH2:1]([N:8]([CH3:27])[C:9]([CH:11]1[C:23]2[C:22]3[C:17](=[CH:18][CH:19]=[CH:20][CH:21]=3)[N:16]([CH2:24][CH2:25][OH:26])[C:15]=2[CH2:14][CH2:13][CH2:12]1)=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.N1C=CC=CC=1.[CH3:34][S:35](Cl)(=[O:37])=[O:36]>ClCCl>[CH2:1]([N:8]([CH3:27])[C:9]([CH:11]1[C:23]2[C:22]3[C:17](=[CH:18][CH:19]=[CH:20][CH:21]=3)[N:16]([CH2:24][CH2:25][O:26][S:35]([CH3:34])(=[O:37])=[O:36])[C:15]=2[CH2:14][CH2:13][CH2:12]1)=[O:10])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

5

Reactant 3

HCID 1049PyridineHCID 31297Methanesulfonyl chlorideHCID 66679264HCID 66679264, compound

Product 1

HCID 46929361HCID 46929361, compoundYield 32%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Conditions

Temperature
0 °C

Procedure

To a solution of 9-(2-hydroxy-ethyl)-2,3,4,9-tetrahydro-1H-carbazole-4-carboxylic acid benzyl-methyl-amide (28) (36 mg, 0.1 mmol) in dichloromethane (2 mL) was added pyridine (7.91 g, 1.0 mmol, 8.1 mL). The reaction was cooled to 0° C. and methanesulfonyl chloride (57 mg, 0.5 mmol, 0.04 mL) was added. The reaction was allowed to warm to room temperature overnight. The mixture was washed with 2 N HCl (2×10 mL) and water (2×10 mL), dried and concentrated in vacuo. The crude material was purified by silica gel chromatography eluting with petrol (A) and ethyl acetate (B) (20-80% B, 4 g, 45 CV, 18 mL/min) to afford 14 mg (32%) of methanesulfonic acid 2-[4-(benzyl-methyl-carbamoyl)-1,2,3,4-tetrahydro-carbazol-9-yl]-ethyl ester as a yellow oil. The structure was confirmed by 1H NMR (CDCl3) δH 1.10-2.40 (5H, m), 2.51 (1.5H, s, OSO2CH3), 2.54 (1.5H, s, OSO2CH3), 2.70-2.90 (2H, m), 3.08 (1.5H, s, NCH3), 3.15 (1.5H, s, NCH3), 3.40-3.70 (1H, m), 4.10-4.80 (4H, m), 7.00-7.50 (9H, m).

Workup

  1. temperatureto warm to room temperature overnight
  2. washThe mixture was washed with 2 N HCl (2×10 mL) and water (2×10 mL)
  3. customdried
  4. concentrationconcentrated in vacuo
  5. customThe crude material was purified by silica gel chromatography
  6. washeluting with petrol (A) and ethyl acetate (B) (20-80% B, 4 g, 45 CV, 18 mL/min)

Sources & evidence

ORD record
ord-e766cdc0eb9c478b87873d3e133e32ef
Source dataset
uspto-grants-2015_10
Patent number
US09168317B2

Reaction notes

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