Acetonitrile → HCID 86592516, compound

Participants

Reaction Steps

A solution of lithium hexamethyldisilazide in THF (1M, 1.24 ml, 1.24 mmol) was added at 0° C. to a solution of allyl 2-methyl-5-(2-mercapto-1,3-thiazol-4-yl)-3,6-dihydro-1(2 H)-pyridinecarboxylate (368 mg, 1.24 mmol) in THF (2.4 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%, 4.73 g, 2.5 mmol) and the solution was allowed to stand in a refrigerator for 13 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: 4/1→3/1) to give allyl (4R,5S,6S)-3-[(4-(1-[(allyloxy)carbonyl]-6-methyl-1,2,5,6-tetrahydro-3-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 (544 mg, 71%).

Provenance & Evidence