Tributylstannane → HCID 86751735, compound

Participants

Reaction Steps

200 g (0.38 mol) of benzyl (1S,4S,5S)-6-(3,4-dimethoxybenzyl)-7-oxo-4-[[(1-imidazolyl)thiocarbonyl]oxy]-2,6-diazabicyclo[3.2.0]heptane-2-carboxylate were heated to 80° C. in 4.2liters of toluene. A solution of 213 ml (0.8 mol) of tributyltin hydride and 6.9 g (0.04 mol) of AIBN in 320 ml of toluene were added dropwise thereto while stirring. After completion of the dropwise addition the mixture was stirred at this temperature for a further 45 minutes before the solvent was removed under reduced pressure. There remained behind a yellowish turbid oil which was chromatographed over 1100 g of silica gel (0.063-0.2 mm particle size with 1) ethyl acetate: hexane 1:10; 2) ethyl acetate: hexane 2:1.

Provenance & Evidence