Bis(4-nitrophenyl) carbonate → tert-butyl(2S,3S)-3-methyl-2-{3-[(6-methyl-2-pyridinyl)methyl]-2-oxo-1-imidazolidinyl}pentanoate

関与物質

反応手順

A solution of the product of Example 32D in N,N-dimethylformamide (60 mL) was treated with bis-(p-nitrophenyl)carbonate (12.6 g, 1.2 equivalents) at 50° C. for 5 hrs. The solvents were evaporated, and the residue was partitioned between water and ethyl acetate. The organic layer was separated, washed with brine, dried over Na2SO4, filtered, and the solvents were evaporated, and the residue was purified using ethyl acetate:hexanes (2:1) to give 7.3 g (57%) of the title compound.

情報源と証拠