<i>Cosmosen</i>: Octa-Armed 24-Membered Cyclic Octaamine Synthesized from a Byproduct in the Preparation of 4-Benzyl-2,6-dioxocyclen
作者:Huiyeong Ju、Miki Iwase、Hikari Sako、Hiroki Horita、Shiori Koike、Eunji Lee、Mari Ikeda、Shunsuke Kuwahara、Yoichi Habata
DOI:10.1021/acs.joc.1c00737
日期:2021.7.16
The synthesis of an octa-armed 24-membered cyclic octaamine (1) is reported. When 4-benzyl-1,4,7,10-tetraazacyclododecane-2,6-dione (3a) was prepared by the reaction of diethylenetriamine with diethyl N-benzyliminodiacetate (2), a dimeric macrocycle (3b) was obtained as a byproduct in a 5% yield. An octa-armed 24-membered cyclic octaamine (1), named Cosmosen, was prepared via the reductive amination
报道了八臂 24 元环状八胺 ( 1 )的合成。当通过二亚乙基三胺与N-苄亚氨基二乙酸二乙酯( 2 )反应制备4-苄基-1,4,7,10-四氮杂环十二烷-2,6-二酮( 3a )时,副产物得到二聚大环( 3b )以 5% 的收益率。通过还原胺化和3b的还原制备了一种名为Cosmosen的八臂 24 元环状八胺 ( 1 ) 。1和2:为1的结合常数1(AG + / 1的)络合1估计是ca。分别为 7.9 和 13.9,通过在 298 K 下在甲醇和氯仿 (v/v, 9:1) 溶液中使用紫外-可见光谱进行滴定实验。