Direct biocatalysed synthesis of first sulfur-, selenium- and tellurium- containing <scp>l</scp>-ascorbyl hybrid derivatives with radical trapping and GPx-like properties
作者:Damiano Tanini、Beatrice Lupori、Gianni Malevolti、Moira Ambrosi、Pierandrea Lo Nostro、Antonella Capperucci
DOI:10.1039/c9cc02427a
日期:——
6-O-l-Ascorbyl selenoesters, thioesters and telluroesters can be efficiently and directly prepared from l-ascorbic acid and suitable functionalised chalcogenoesters through lipase-catalysed transesterification reactions.
Palladium‐Catalyzed Thio‐ and Selenocarbonylation of 2‐Iodoglycals
作者:Mariana P. Darbem、Henrique A. Esteves、Isadora M. Oliveira、Daniel C. Pimenta、Hélio A. Stefani
DOI:10.1002/cctc.201901403
日期:2020.1.18
The carbonylative cross‐coupling reactions of 2‐iodoglycals with thiols and selenols in the presence of molybdenum hexacarbonyl as a solid source of carbon monoxide is described. This methodology permitted the synthesis of 29 C2‐glycosides bearing thioester and selenoester functionalities in moderate to excellent yields and high functional group tolerance. Moreover, this communication describes the
Selenols: a new class of carbonic anhydrase inhibitors
作者:Andrea Angeli、Damiano Tanini、Alessio Nocentini、Antonella Capperucci、Marta Ferraroni、Paola Gratteri、Claudiu T. Supuran
DOI:10.1039/c8cc08562e
日期:——
were obtained through a convenient procedure. Selenols represent a new chemotype acting as carbonic anhydrase inhibitors (CAIs), inhibiting four human isoforms, CAs I, II, VII and the tumor-associated CA IX. X-ray crystallographic, physical and computational studies provided insights into the binding mode of this conceptually newclass of CAIs.
Studies on Long-range Couplings between<sup>77</sup>Se and<sup>13</sup>C in Some Aryl Selenides, Dichlorides, and Selenoxides. The Inverse Effect on Couplings in the Selenoxide Formation
作者:War\={o} Nakanishi、Yoshitsugu Ikeda
DOI:10.1246/bcsj.56.1661
日期:1983.6
Long-range coupling constants between 77Se and 13C in selenoanisole, diphenyl selenide, diphenyl diselenide, and their 2-mono- and 2,2′-disubstituted derivatives, selenoxanthone, selenanthrene, dichlorides, and selenoxides were measured to disclose predominant factors governing the magnitude of the coupling. Extraordinary large values for two- and three-bond couplings are found in selenoxanthone. Three factors are operative: the orientational effect, the coordination number, and the effect of ring formation. The last factor accompanies a stronger inverse effect on the coupling of selenoxides than on that of selenides.
Copper(I)‐Catalyzed Conjugate Addition/Enantioselective Protonation with Selenols and α‐Substituted α,β‐Unsaturated Thioamides
作者:Hu Tian、Hong‐Ming Zhang、Liang Yin
DOI:10.1002/anie.202301422
日期:2023.6.12
A copper(I)-catalyzed conjugate addition/enantioselective protonation with selenols and α-substituted α,β-unsaturated thioamides is disclosed, which affords a series of chiral selenides in high to excellent enantioselectivity.