Diazomethane → HCID 15702727, compound

Participants

Reaction Steps

14 g (purity 70%; 20 mmoles) of 1-(1-carboxy-2-methylprop-2-enyl)-3-phenylacetamido-4-phthalimidothio-azetidin-2-one was treated with a diazomethane solution in diethyl ether. After evaporation of the reaction mixture to dryness, benzene was added. After filtering off the phthalimide, the filtrate was concentrated and chromatographed [silica gel; toluene - ethyl acetate 4:1(v/v] to obtain 6.24 g (62% yield) of 1-(1-methoxycarbonyl-2-methylprop-2-enyl)-3-phenylacetamido-4-phthalimidothio-azetidin-2-one.

Provenance & Evidence