The synthesis of an isopropyl substituted 1,4,7-triazacyclononane via an in situ sequential macrocyclisation method
作者:Graham Stones、Gilles Argouarch、Alan R. Kennedy、David C. Sherrington、Colin L. Gibson
DOI:10.1039/b302887a
日期:——
L-valine methyl ester hydrochloride as starting material, the synthesis of (2S)-2-isopropyl-1,4,7-trimethyl-1,4,7-triazacyclononane is described. Various standard Richman-Atkins cyclisation methods gave only poor yields in the key macrocyclisation step. Efficient macrocyclisation yields were, however, realised when an in situ sequential cyclisation method was developed.
以L-缬氨酸甲酯盐酸盐为原料,描述了(2S)-2-异丙基-1,4,7-三甲基-1,4,7-三氮杂环壬烷的合成。在关键的大环化步骤中,各种标准的Richman-Atkins环化方法仅产生较差的产量。然而,当开发了一种原位顺序环化方法时,就实现了有效的大环化产率。