Ethyl Acetate → 7-(1-aminoethyl)-6-(3,5-difluorophenyl)-3-methyl-5H-[1,3]thiazolo[3,2-a]pyrimidin-5-one

HRID 1429811Notes

Reaction equation

HRID 1429811 reaction equation
[N:1]([CH:4]([C:6]1[N:7]=[C:8]2[S:23][CH:22]=[C:21]([CH3:24])[N:9]2[C:10](=[O:20])[C:11]=1[C:12]1[CH:17]=[C:16]([F:18])[CH:15]=[C:14]([F:19])[CH:13]=1)[CH3:5])=[N+]=[N-].CP(C)C.CCOC(C)=O>O1CCCC1.O>[NH2:1][CH:4]([C:6]1[N:7]=[C:8]2[S:23][CH:22]=[C:21]([CH3:24])[N:9]2[C:10](=[O:20])[C:11]=1[C:12]1[CH:17]=[C:16]([F:18])[CH:15]=[C:14]([F:19])[CH:13]=1)[CH3:5]

Participants

6

Reactant 3

HCID 8857Ethyl AcetateHCID 68983TrimethylphosphineHCID 866500657-(1-azidoethyl)-6-(3,5-difluorophenyl)-3-methyl-5H-[1,3]thiazolo[3,2-a]pyrimidin-5-one

Product 1

HCID 581114097-(1-aminoethyl)-6-(3,5-difluorophenyl)-3-methyl-5H-[1,3]thiazolo[3,2-a]pyrimidin-5-oneYield 97%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 8028TetrahydrofuranSolvent2×

Procedure

To a stirred solutions of 7-(1-azidoethyl)-6-(3,5-difluorophenyl)-3-methyl-5H-[1,3]thiazolo[3,2-a]pyrimidin-5-one (0.15 g, 0.43 mmol) (1 st peak from chiral separation) in tetrahydrofuran (2 mL) and water (0.5 mL) were added 1.00 M of trimethylphosphine in tetrahydrofuran (0.52 mL, 0.52 mmol) at room temperature and the mixtures were stirred at room temperature for 1 hour. To the mixture was added EtOAc and the mixture was extracted with aqueous 1N HCl solution (three times). The combined extracts were neutralized with solid Na2CO3 and extracted with dichloromethane (two times). The combined organic layers were washed with brine, dried over Na2SO4, and concentrated to give the desired product (134 mg, 96.6%). LCMS calculated for C15H14F2N3OS (M+H)+: m/z=322.1. Found: 322.0.

Workup

  1. extractionthe mixture was extracted with aqueous 1N HCl solution (three times)
  2. extractionextracted with dichloromethane (two times)
  3. washThe combined organic layers were washed with brine
  4. dry with materialdried over Na2SO4
  5. concentrationconcentrated

Sources & evidence

ORD record
ord-e73549c9841b4f2ebe5185c65e46fd88
Source dataset
uspto-grants-2015_01
Patent number
US08940752B2

Reaction notes

Loading…