Synthesis and characterization of new di-n-butylhydroxytin(IV) derived compounds from 1,3-diketone malonates

Electronic effects on keto–enol tautomerism of p-substituted aryl-1,3-diketone malonates

“…1,3-Diketone malonates have been applied in the synthesis of some heterocyclic compounds [23] or metal-ligand coordination compounds such as organotin (IV) complexes [24,25]. We have also shown the use of the title diketone malonates as additives in corrosion inhibition of metals, by considering the importance of tautomeric equilibrium property [26], as it has been observed in curcuminoid 1,3-diketones [27].…”

Synthesis and Characterization of Three New di-n-butyl [bis (alkyl-aminopropionic acid)]tin (IV)

“…This can indicate unique species or a fast exchanging equilibrium, on the NMR time scale. The chemical shifts are within the range of di-n-butyl (IV) hexacoordinated compounds [3][4][5][6][18][19][20][21][22]. Neverthelees, for compound 2a, the 119 Sn NMR spectrum show five signals in ca.…”

“…All compounds (2a-2c) exhibited 1 J( 119 Sn-13 C) and 2 J( 117 Sn-13 C) coupling 749/608, 720/690 and 705/633 Hz respectively within the range of trans six-coordinated tin compound [16][17][18][19] The 119 Sn NMR spectra of 2b and 2c at room temperature in chloroform show only one signal at -203.96 and -204.20 ppm respectively. This can indicate unique species or a fast exchanging equilibrium, on the NMR time scale.…”

“…In particular, diorganotin (IV) compounds derived from ligands containing nitrogen and oxygen donor atoms present increasing number of reports, mainly derivates of aminoacids and analogues have been investigated [16,17]. Our current interest in the synthesis of organotin compounds and structural analysis [18][19][20][21][22], prompted us to extend our investigation in the synthesis of new organotin (IV) compounds, which could have corrosion inhibitors properties [23].…”

A Chelating Nucleophile Plays a Starring Role: 1,8-Naphthyridine-Catalyzed Polycomponent α,α-Difluorination of Acid Chlorides

“…When 1,8-naphthyridine was combined with the acid chloride, bands were observed at 1628 and 1606 cm –1 , indicative of an acylpyridinium salt . Upon the addition of Sn(OTf) 2 to the naphthyridine–acid chloride mixture, a band emerged at 1736 cm –1 , suggesting coordination between tin and the carbonyl group . Moreover, bands at 1272 and 1375 cm –1 imply ionic CF 3 SO 3 – and monodentate-bound trifluoromethanesulfonate, respectively .…”