Huang, Yong published the artcileAn Efficient Synthesis of N,N,N-Substituted 1,4,7-Triazacyclononane, HPLC of Formula: 140-28-3, the publication is European Journal of Organic Chemistry (2018), 2018(13), 1546-1551, database is CAplus.
A new and efficient synthetic approach is reported for various N,N,N-substituted 1,4,7-triazacyclononanes (TACN) in moderate to excellent yields, with optimization of the reaction sequences and conditions of the intermediate 1,4,7-tribenzyl-1,4,7-triazonane-2,6-dione reduction with LiAlH4, removal of benzyl with Pd/C, and alkylation reactions. This reaction scheme provides a convenient and flexible method to prepare various N,N,N-substituted TACN derivatives
European Journal of Organic Chemistry published new progress about 140-28-3. 140-28-3 belongs to catalysis-chemistry, auxiliary class Benzenes, name is N1,N2-Dibenzylethane-1,2-diamine, and the molecular formula is C16H20N2, HPLC of Formula: 140-28-3.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia