期刊
JOURNAL OF ORGANIC CHEMISTRY
卷 86, 期 14, 页码 9847-9853出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.joc.1c00737
关键词
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资金
- MEXT of Japan [17K05844, 20K05480]
- JSPS (Toho University) [18F18343]
- Marubun Research Promotion Foundation (Japan)
- Grants-in-Aid for Scientific Research [20K05480, 17K05844] Funding Source: KAKEN
The synthesis of an octa-armed 24-membered cyclic octaamine was reported, with a dimeric macrocycle obtained as a byproduct. The compound named Cosmosen was prepared via reductive amination and reduction. Binding constants for the complexation of 1 with Ag+ were estimated using UV-vis spectrometry.
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 and reduction of 3b. The binding constants for the 1:1 and 2:1 (Ag+/1) complexation of 1 were estimated to be ca. 7.9 and 13.9, respectively, by titration experiments using UV-vis spectrometry in methanol and chloroform (v/v, 9:1) solutions at 298 K.
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