Diphosgene → 6-(Phenylmethyl)-1,6-diazabicyclo[3,2,1]octan-7-one

Participants

Reaction Conditions

Reaction Steps

1.06 g of the product obtained in stage C is dissolved in 28 cm3 of toluene, then cooled down to 0° C. and 337 μl of diphosgene is added under an inert gas. Then the temperature is left to rise and maintained for 2 hours at 20° C. The reaction medium is concentrated under reduced pressure then the residue is chromatographed on silica eluting successively with methylene chloride-acetone 95/5 then 80/20 and finally methylene chloride-methanol, triethylamine 92/8/3 and 362 mg of expected product C13H16N2O (M=216.85 g) is obtained i.e. a yield of 30%.

Provenance & Evidence