Synthesis of Cyclic Guanidine Intermediates of Anatoxin-a(s) in Both Racemic and Enantiomerically Pure Forms
作者:Ernani Pinto、Sidnei Moura
DOI:10.1055/s-0029-1219559
日期:2010.4
The alkyl chain of anatoxin-a(s) (cyclic guanidines), which can be used as an intermediate in the total synthesis of anatoxin-a(s), was synthesized in both racemic and enantiomerically pure forms. These enantiomerically pure cyclic compounds can be used as chiral inductors in some reactions. The two racemic routes disclosed herein have the advantages of high overall yield and mild reaction conditions
anatoxin-a(s)(环状胍)的烷基链可用作 anatoxin-a(s) 全合成的中间体,以外消旋和对映体纯形式合成。这些对映体纯环状化合物可在某些反应中用作手性诱导剂。本文公开的两条外消旋路线具有总收率高和反应条件温和的优点。两条路线都通过中间体 2,3-二氨基酸(一种重要的合成支架)进行,收率很高。此外,N,N-二甲基-2(tosylimino)imidazolidine-4-carboxamide 可以从 2-(tosylimino)imidazolidine-4- 羧酸然后选择性还原羰基官能团获得。通过质谱和 1 H NMR 和 13 C NMR 光谱分析所有合成的化合物。