Oxidative Dehydrogenative [3+3] Annulation of Benzylhydrazines with Aziridines Leading to Tetrahydrotriazines

Abstract

Summary of main observation and conclusion Oxidative dehydrogenative [3+3] annulation of benzylhydrazines with N‐sulfonylaziridines is described. A series of complex tetrahydro‐1,2,4‐triazines were produced under mild reaction conditions.

In situ preparation of mesoporous Fe/TiO2 catalyst using Pluronic F127-assisted sol-gel process for mid-temperature NH3 selective catalytic reduction

“…The Raman spectrum of anatase TiO2 has three major bands, at around 403, 519, and 640 cm −1 [29]. Among the three samples, the Fe/TiO2(t) catalyst showed the largest red shift to a lower wavenumber of the peak at 393 cm −1 , suggesting strong interactions between Fe and Ti; this is consistent with the UV-vis results.…”

Derivatives of the triaminoguanidinium ion, 6. Aminal-forming reactions with aldehydes and ketones

“…It can be seen, that under the given reaction conditions the first step (10 → 11) has an appromixate half-life time of 1 h, whereas the reaction mixture contains 11 and 12 in the ratio 14:86 after 72 h. The last step (12 → 13) appears to be rather slow, and only a small amount of 13 (9%) was observed after 90 h. The spontaneous dehydrogenation of the benzylamino groups in 10-12 is remarkable. In other cases, the conversion of a benzylhydrazine into a benzylhydrazone with oxygen was achieved in the presence of transitionmetal catalysts (N-methyl-N-phenyl-N′-benzylhydrazine, air, Ru(bpyrz) 2+ , hν [23]; benzyl 2-benzylhydrazinecarboxylate, O 2 , Cu(OAc) 2 [24]).…”