Sulfur-containing scaffold, as aubiquitous structural motif, has been frequently used in natural products, bioactive chemicals and pharmaceuticals, particularly CÀS/NÀS bonds are indispensable in many biological importantc ompounds and pharmaceuticals. Development of mild and general methods for CÀS/NÀSb onds formation hasg reat significance in modern research. Iodine and its derivativesh ave been recognizeda si nexpensive,e nvironmentally benign and easy-handled catalysts or reagents to promote the construction of CÀS/NÀSb onds under mild reactionc onditions, with good regioselectivities andb road substrate scope.E specially based on this, severaln ew strategies, such as oxidation relay strategy,havebeen greatlydeveloped and accelerated the advancement of this field. This review focuses on recent advances in iodine and its derivatives promoted hybridized CÀS/NÀSbonds formation.The features and mechanisms of corresponding reactions are summarized and the results of some cases are compared with those of previous reports. In addition, the future of this domain is discussed.
Nowadays, semiconductor‐based heterogeneous photocatalysis is receiving much more attention than ever before owing to the increasing challenge of environmental pollution and worldwide demand for clean energy. The stoichiometry of the photocatalytic reactions usually includes the simultaneous gain or loss of electrons and protons. However, not enough emphasis has been placed on the effect of proton transfer on the photocatalytic reactions, particularly on the kinetics of interfacial redox steps. In this article, we highlight the effects of proton on the interfacial electron transfer during the photocatalytic redox reactions. We try to emphasize that the proton transfer can largely determine the energetic profile and reaction pathway by participating in the interfacial redox reactions. Better understanding on the roles and the detailed mechanisms of proton transfer in the photocatalytic surface reactions is required for the further improvement of photocatalytic efficiency.
A versatile Cu-catalyzed cross-coupling reaction to various unsymmetrical disulfanes has been presented, from phthalimide-carried disulfur transfer reagents and commercially available boronic acids under mild and practical conditions. The method features the unprecedented use of phthalimide-carried disulfurating reagents (Harpp reagent) in cross-coupling chemistry and is highlighted by the broad substrate scopes, even applicable for the transfer of aryldisulfur moieties (ArSS−). Notably, the robustness of this methodology is shown by the late-stage modification of bioactive scaffolds of coumarin, estrone, and captopril.
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