Benzyl succinimido carbonate → 1-benzyl 4-(tert-butyl) (S)-2-methylpiperazine-1,4-dicarboxylate

Participants

Reaction Steps

A mixture of 2.5 g (S)-4-N-Boc-2-methyl-piperazine, 3.5 g N-(Benzyloxycarbonyl-oxy)succinimide and 2.0 g NaHCO3 in 10 ml dioxane/water 1/1 was stirred for 12 h. The mixture was diluted with ethyl acetate, the phases separated and the organic phase washed with water, saturated aqueous NaHCO3, 0.1 M HCl and brine. The crude product obtained after drying over MgSO4 and evaporation of the solvents was used in the subsequent reaction. Yield: 4.3 g.

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