Ethylmorpholine → 3-(2,3-dimethoxy-5-methyl-1,4-benzoquinon-6-yl)propionyl-L-proline

Participants

Reaction Steps

To a solution of p-nitrophenyl 3-(2,3-dimethoxy-5-methyl-1,4-benzoquinon-6-yl)propionate (187 mg, 0.5 mmol) and L-proline (57 mg, 0.5 mmol) in N,N-dimethylformamide (5 ml ) was added N-ethylmorpholine (128 μl, 1.0 mmol). The mixture was stirred at room temperature for 2 days. Thereafter, the reaction mixture was further treated in the same manner as Example 1 to give 3-(2,3-dimethoxy-5-methyl-1,4-benzoquinon-6-yl)propionyl-L-proline (81 mg), melting at 131° C.

Provenance & Evidence