Triethylamine → (7R,8aS)-7-methanesulfonyloxy-2-(5-fluoropyrimidin-2-yl)-1,2,3,4,6,7,8,8a-octahydro-pyrrolo[1,2-a]pyrazine

HRID 1594591Notes

Reaction equation

HRID 1594591 reaction equation
[OH:1][C@H:2]1[CH2:17][N:5]2[CH2:6][CH2:7][N:8]([C:10]3[N:15]=[CH:14][C:13]([F:16])=[CH:12][N:11]=3)[CH2:9][C@@H:4]2[CH2:3]1.C(N(CC)CC)C.[CH3:25][S:26](Cl)(=[O:28])=[O:27].[OH-].[Na+]>C(Cl)Cl.O>[CH3:25][S:26]([O:1][C@H:2]1[CH2:17][N:5]2[CH2:6][CH2:7][N:8]([C:10]3[N:11]=[CH:12][C:13]([F:16])=[CH:14][N:15]=3)[CH2:9][C@@H:4]2[CH2:3]1)(=[O:28])=[O:27]

Participants

7

Reactant 4

HCID 8471TriethylamineHCID 14798Sodium HydroxideHCID 31297Methanesulfonyl chlorideHCID 15886074(7R,8aS)-7-hydroxy-2-(5-fluoropyrimidin-2-yl)-1,2,3,4,6,7,8,8a-octahydro-pyrrolo[1,2-a]pyrazine

Product 1

HCID 86752023(7R,8aS)-7-methanesulfonyloxy-2-(5-fluoropyrimidin-2-yl)-1,2,3,4,6,7,8,8a-octahydro-pyrrolo[1,2-a]pyrazineYield 86.6%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6344DichloromethaneSolvent2×

Procedure

A solution of 1.00 g (4.20 mmol) of (7R,8aS)-7-hydroxy-2-(5-fluoropyrimidin-2-yl)-1,2,3,4,6,7,8,8a-octahydro-pyrrolo[1,2-a]pyrazine (Preparation 6) and 0.644 mL (4.62 mmol) of triethylamine in 40 mL of methylene chloride was chilled to 0° C. and 0.34 mL (4.41 mmol) of methanesulfonyl chloride in 20 mL of methylene chloride was added slowly. After 30 minutes, water was added and the pH adjusted to 10 with 1M NaOH. The layers were separated, the organic phase was washed with water (2×), dried (magnesium sulfate), filtered and evaporated to give 1.15 g (86%) of the title compound of sufficient purity for use in subsequent reactions. m/z (MH+) 317.

Workup

  1. customThe layers were separated
  2. washthe organic phase was washed with water (2×)
  3. dry with materialdried (magnesium sulfate)
  4. filtrationfiltered
  5. customevaporated

Sources & evidence

ORD record
ord-a469038a25034ffab9e146714cd16916
Source dataset
uspto-grants-2001_09
Patent number
US06284757B1

Reaction notes

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