作者:Roger B. Clark、Daniel Elbaum
DOI:10.1016/j.tet.2007.01.044
日期:2007.4
oxazolidinone to yield 2-(benzyloxymethyl)piperazines and 2-(phenoxymethyl)piperazines, respectively. The tetrahydro-1H-oxazolo[3,4-a]pyrazin-3(5H)-ones also provide convenient scaffolds from which 2-benzyl- and 2-phenethylpiperazines are prepared.
由双氨基甲酸酯保护的哌嗪-2-羧酸可轻松制备四氢-1 H-恶唑并[3,4- a ]吡嗪-3(5 H)-酮,并用作正交保护的哌嗪,从中可得到各种2-可以制备取代的哌嗪。苯甲酸钠和苯甲酸钠在恶唑烷酮的C-5碳上反应,分别生成2-(苄氧基甲基)哌嗪和2-(苯氧基甲基)哌嗪。四氢-1 H-恶唑并[3,4- a ]吡嗪-3(5 H)-酮也提供了方便的支架,由此制备了2-苄基-和2-苯乙基哌嗪。