Acetonitrile → HCID 11104084, compound

Participants

Reaction Steps

A solution of lithium hexamethyldisilazide in THF (1M, 0.58 ml, 0.58 mmol) was added at 0–5° C. to a solution of allyl (2R)-4-(2-mercapto-1,3-thiazol-4-yl)-2-methyl-3,6-dihydro-1(2 H)-pyridinecarboxylate (172 mg, 0.58 mmol) in THF (2.0 ml) and the mixture was stirred for 10 minutes. To the reaction solution was added at 0° C. a solution of allyl (4R,5R,6S)-3-[(diphenoxyphosphino)oxy]-4-methyl-7-oxo-6-{(1R)-1-[(trimethylsilyl)oxy]ethyl}-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate in acetonitrile (30%, 2.21 g, 1.2 mmol) and the solution was allowed to stand in a refrigerator for 16 hours. To the reaction solution was added ice water and the reaction mixture was extracted with ethyl acetate. The organic layer was washed with a saturated aqueous sodium chloride solution and dried over anhydrous sodium sulfate. After removal of the solvent in vacuo, the residue was purified with silica gel chromatography (hexane/ethyl acetate: 1/4→1/3) to give allyl (4R,5S,6S)-3-[(4-{(2R)-1-[(allyloxy)carbonyl]-2-methyl-1,2,3,6-tetrahydro-4-pyridinyl}-1,3-thiazol-2-yl)sulfanyl]-4-methyl-7-oxo-6-{(1R)-1-[(trimethylsilyl)oxy]ethyl}-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (137 mg, 38%).

Provenance & Evidence