5625-67-2, Piperazin-2-one is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated
5625-67-2, [Referential Example 90]; 4-Methyl-3-oxopiperazine-1-carboxylic acid tert-butyl ester; 1) 3-Oxopiperazine-1-carboxylic acid tert-butyl ester ; Triethylamine (3.9 mL) and di-tert-butyl dicarbonate (6.31 g) were added to 2-oxopiperazine (2.61 g) in a mixture of tetrahydrofuran (40 mL) and methanol (50 mL) at room temperature, followed by stirring for 3 hours. The solvent was evaporated under reduced pressure. To the residue, diethyl ether was added, and the precipitated solid was recovered by filtration, to thereby give 3-oxopiperazine-1-carboxylic acid tert-butyl ester (4.54 g, 87%).1H-NMR(400MHz,DMSO-d6)delta: 1.40(9H,s), 3.15(2H,br), 3.45(2H,br), 3.81(2H,br), 8.03(1H,br). LC-MSm/z: 201(M+H)+.
As the paragraph descriping shows that 5625-67-2 is playing an increasingly important role.
Reference：
Patent; DAIICHI PHARMACEUTICAL CO., LTD.; EP1591443; (2005); A1;,
Piperazine – Wikipedia
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