作者:Claude Larrivée Aboussafy、Derrick L. J. Clive
DOI:10.1021/jo3007144
日期:2012.6.1
Piperazine-2,5-diones are formed by Dieckmann cyclization (NaH, THF) of substructures of the type CH2-N(R)C(O)CH2N(R′)CO2Ph in which the terminal methylene (CH2) that is adjacent to nitrogen closes onto the carbonyl group of the phenyl carbamate unit at the other end of the chain. R and R′ are alkyl groups, and the terminal methylene is activated by a ketone carbonyl, a nitrile, an ester, or a phosphoryl
通过Dieckmann环化(NaH,THF)形成CH 2 -N(R)C(O)CH 2 N(R')CO 2 Ph类型的亚结构,其中末端亚甲基(CH 2)与氮相邻在链的另一端封闭在氨基甲酸苯酯单元的羰基上。R和R'是烷基,并且末端亚甲基被酮羰基,腈,酯或磷酰基活化。原料通过标准的酰化和氧化工艺组装而成,其起始原料为β-(烷基氨基)醇,(烷基氨基)乙腈,(烷基氨基)酯或(烷基氨基)甲基膦酸酯。