Dialkyltin oxide mediated addition of trimethylsilyl azide to nitriles. A novel preparation of 5-substituted tetrazols

In situ Synthesis, Crystal Structure, XPS and Fluorescent Property of a Novel Two-Dimensional Binuclear Copper(I) Tetrazole Complex

“…[19][20][21] In addition, a new broad middle absorption around the 3400 cm −1 suggests the existence of water molecules in title compound. Crystallographic data of 1 (Table 1) suggest that title compound belong to monoclinc crystal system, C2/c space group.…”

“…To the best of our knowledge, this type of Cu···Cu interaction is obviously stronger than that of tetrazole complex [Cu(Mtta)] n (3.484-3.592 Å) et al 20 and Cu I triazole coordination polymer (3.421 Å). 19 The attractive interactions between closed-shell d 10 metal centers have received extensive attention because they play an important role in optical and electronic properties of polynuclear d 10 metal complexes. 15,16,25 In addition, there exist a weak interaction uncoordinated water molecules and pyridyl group that are speculated to hold together the molecules of the compound.…”

“…As we expected, at room temperature, solidstate of 1 shows three distinct strong photoluminescence with maxima (λ em at 469 nm, 483 nm and 494 nm) upon excitation at 355 nm ( Figure 7). According to previous research and our investigation on Cu I -tetrazolate compounds, 3,[12][13][14][15]27,28 the two peaks at about 483 nm and 494 nm (shoulder) may be attributed to a [Cu-π*(tetrazolate)] metal-to-ligand charge transfer (MLCT), 19 while another strong peak at about 469 nm in title complex is tentatively probably involved with Cu···Cu [3d-4s] cluster-centered (CC) excited states. Especially, there may exist CC excited states because of the vibronic progression in the spectra and the short Cu···Cu distances in the structures, 25 but it is still uncertain in light of Cotton's work through DFT calculations, which points out that short Cu···Cu separation does not guarantee a metal-metal bond, and related bonds and angles with the bridging ligands should be taken into account.…”

Synthesis of variously coupled conjugates of d-glucose, 1,3,4-oxadiazole, and 1,2,3-triazole for inhibition of glycogen phosphorylase

“…Thus, reaction of 13 with Bu 3 SnN 3 in 1,2-dimethoxyethane at reflux (DME, conditions b) followed by acidic workup 21 gave 17 100 in essentially quantitative yield. Another method, applying Me 3-SiN 3 and Bu 2 SnO (conditions c) for in situ generation of dibutyl trimethylsilyloxytin azide 22 was similarly efficient. Conditions a afforded tetrazoles 18 and 20 from the corresponding nitriles 14 and 16 in good and excellent yields, respectively; however, reaction of 15 to give the 1-naphthyl derivative 19 failed.…”

Di-n-butyltin Oxide (DBTO)

“…8 It was later demonstrated that N-bromosuccinimide (NBS) 9 and 1,3-dibromo-5,5-dimethylhydantoin 10 can replace Br 2 in this reaction. 12 (E) The dehydrative condensation of 1,2-aminoalcohols with carbon dioxide (5 MPa) has been achieved in N-methylpyrrolidone (NMP) with Bu 2 SnO (10 mol%), and 2-oxazolidinones were obtained in 53-94% yield. These are useful intermediates for the synthesis of many target molecules, including polymers, agricultural chemicals, and biologically active compounds.…”