Triethylamine → HCID 19699662, compound

HRID 466585Notes

Reaction equation

HRID 466585 reaction equation
[O:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[C:3]([N:10]2[CH2:15][CH2:14][N:13]3[CH2:16][CH:17]([CH2:20][OH:21])[CH2:18][CH2:19][CH:12]3[CH2:11]2)=[N:2]1.C(N(CC)CC)C.[CH3:29][S:30](Cl)(=[O:32])=[O:31].C(Cl)Cl.CO>C(Cl)Cl.[H+].[H+].[Cl-].[Cl-].[Cl-].[Cl-].[Cl-].[Cl-].[K+].[I-].[Pt].O>[O:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[C:3]([N:10]2[CH2:15][CH2:14][N:13]3[CH2:16][CH:17]([CH2:20][O:21][S:30]([CH3:29])(=[O:32])=[O:31])[CH2:18][CH2:19][CH:12]3[CH2:11]2)=[N:2]1

Participants

8

Reactant 4

HCID 8471Triethylamine2×HCID 31297Methanesulfonyl chloride2×HCID 21226129Dichloromethane methanolHCID 22491366Racemic (7S*,9aS*)-2-(Benzo[d]isoxazol-3-yl)perhydro-7-(hydroxymethyl)-1H-pyrido[1,2-a]pyrazine

Product 1

HCID 19699662HCID 19699662, compoundYield 90.2%

Reagents, catalysts & solvents 3

HCID 170165iodoplatinateCatalystHCID 962WaterSolventHCID 6344DichloromethaneSolvent4×

Conditions

Temperature
5 °C

Procedure

To a chilled (5° C.) and stirred slurry of the alcohol title product of Example 4 (154.0 g, 0.54 mol) and triethylamine (81.76 ml, 59.6 g, 0.589 mol) in methylene chloride (3.0 liters), a solution of methanesulfonyl chloride (43.55 ml, 64.5 g, 0.563 mol) in methylene chloride (350 ml) was added dropwise over 30 minutes. TLC monitoring (methylene chloride/methanol=9:1 in volume; iodoplatinate spray) of the reaction mixture after an additional 1/2 hour of stirring indicated incomplete reaction. Complete reaction was realized within 1/2 hour after addition of a second portion of triethylamine (8.23 ml, 6.0 g, 59.3 mmol) and methanesulfonyl chloride [4.32 ml, 6.4 g, 55.9 mmol) added dropwise as a methylene chloride (20 ml) solution]. Water (3 liters) and methylene chloride (1.5 liters) were added, and the biphasic mixture was vigorously stirred prior to separation of the organic and aqueous phases. The aqueous portion was then extracted with a fresh portion of methylene chloride (1.5 liters). The organic extracts were then combined, washed with brine (twice with 2 liter portions) and dried over anhydrous sodium sulfate. Concentration in vacuo afforded the present title compound as a tan solid (178.0 g, 90.2% yield). TLC Rf (methylene chloride/methanol=9:1 in volume; iodoplatinate spray): 0.24. MS m/z 365.1 (M, C17H23N3O4S). 13CNMR (CDCl3) delta 164.0, 160.9, 129.6, 122.4, 122.1, 116.0, 110.5, 71.9, 59.9, 57.7, 54.0, 53.3, 48.1, 37.4, 35.9, 28.4, 26.2.

Workup

  1. customreaction
  2. customComplete reaction
  3. customto separation of the organic and aqueous phases
  4. extractionThe aqueous portion was then extracted with a fresh portion of methylene chloride (1.5 liters)
  5. washwashed with brine (twice with 2 liter portions) and
  6. dry with materialdried over anhydrous sodium sulfate
  7. concentrationConcentration in vacuo

Sources & evidence

ORD record
ord-a6618add26f946e6aeb5c9f0db64eded
Source dataset
uspto-grants-1992_10
Patent number
US05157034

Reaction notes

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