74115-24-5Relevant articles and documents
PROCESS FOR PREPARING FUNCTIONALIZED 1,2,4,5-TETRAZINE COMPOUNDS
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, (2017/06/29)
The present invention relates to a process for the synthesis of 3,6 functionalized 1,2,4,5-tetrazine compounds of formula (I); wherein A and B being the same; and wherein at least one of R1, R1', R2 and R2' and at least one of R10 and R10' is a halogen atom or acetate group; said process comprising reacting the corresponding 1,2,4,5-tetrazine compounds wherein at least one of R1, R1', R2 and R2' and at least one of R10 and R10' is a hydrogen atom with an oxidative reagent in presence of a catalyst.
Ortho-Functionalized Aryltetrazines by Direct Palladium-Catalyzed C-H Halogenation: Application to Fast Electrophilic Fluorination Reactions
Testa, Christelle,Gigot, élodie,Genc, Semra,Decréau, Richard,Roger, Julien,Hierso, Jean-Cyrille
, p. 5555 - 5559 (2016/05/09)
A general catalyzed direct C-H functionalization of s-tetrazines is reported. Under mild reaction conditions, N-directed ortho-C-H activation of tetrazines allows the introduction of various functional groups, thus forming carbon-heteroatom bonds: C-X (X=I, Br, Cl) and C-O. Based on this methodology, we developed electrophilic mono- and poly-ortho-fluorination of tetrazines. Microwave irradiation was optimized to afford fluorinated s-aryltetrazines, with satisfactory selectivity, within only ten minutes. This work provides an efficient and practical entry for further accessing highly substituted tetrazine derivatives (iodo, bromo, chloro, fluoro, and acetate precursors). It gives access to ortho-functionalized aryltetrazines which are difficult to obtain by classical Pinner-like syntheses.
Synthesis, structure analysis, and antitumor activity of 3,6-disubstituted-1,4-dihydro-1,2,4,5-tetrazine derivatives
Rao, Guo-Wu,Hu, Wei-Xiao
, p. 3702 - 3705 (2007/10/03)
Fourteen compounds of 3,6-disubstituted-1,4-dihydro-1,2,4,5-tetrazine derivatives were prepared and their structures were confirmed by single-crystal X-ray diffraction and the semi-empirical calculation of PM3 method. This reaction yields the 1,4-dihydro derivatives rather than the 1,2-dihydro derivatives. The central six-membered ring of 1,4-dihydro-1,2,4,5-tetrazine has a chair conformation and therefore is not homoaromatic. Their antitumor activities were evaluated in vitro by SRB method for A-549 and BEL-7402 cells, and MTT method for P-388 and HL-60 cells. The results show that there is one compound which is highly effective against P-388 cells and one compound which is highly effective against HL-60 cells. So it is a kind of compound which possesses potential antitumor activities and is worth to research further.