作者:Fariba Jam、Marcus Tullberg、Kristina Luthman、Morten Grøtli
DOI:10.1016/j.tet.2007.06.108
日期:2007.9
for the synthesis of spiro-2,5-diketopiperazines (spiro-DKPs) is described. Cyclization of Boc-protected dipeptides containing spiro-amino acids by microwave assisted heating in water furnished the corresponding spiro-DKPs. The spiro-amino acids were prepared by combining stereoselective alkylation reactions using the Schöllkopf methodology for amino acid construction with Grubbs ring-closing metathesis
描述了一种合成螺2,5-二酮哌嗪(spiro-DKPs)的通用有效方法。通过微波辅助在水中加热,使含有螺氨基酸的Boc保护的二肽环化,得到了相应的螺DKP。通过使用Schöllkopf方法进行氨基酸构建的立体选择性烷基化反应与使用钌配合物的Grubbs闭环复分解(RCM)方法相结合来制备螺氨基酸。RCM反应以及随后所有向spiro-DKP的转化均在微波辅助加热条件下进行,因此所有步骤的收率高且反应时间短。