Transition-metal-free decarboxylative thiolation of stable aliphatic carboxylates
作者:Wei-Long Xing、De-Guang Liu、Ming-Chen Fu
DOI:10.1039/d1ra00063b
日期:——
transition-metal-free decarboxylative thiolation protocol is reported in which primary, secondary, tertiary (hetero)arylacetates and α-CN substitutedacetates undergo the decarboxylative thiolation smoothly, to deliver a variety of functionalized aryl alkyl sulfides in moderate to excellent yields. Aryl diselenides are also amenable substrates for construction of C–Se bonds under the simple and mild reaction
bibenzyls and related ethane derivatives in high yields. Other diselenides were easily caused to cleave to give various aromatic and aliphatic olefins in good yields together with elemental selenium. Lepidopterene, [2.2]paracyclophane, and benzocyclobutene were prepared by thermal cleavage of their corresponding phenylselenomethyl-substituted compounds as an application of the pyrolysis concerned.
We report the first metal-free selenolations of pyridinium salts with diselenides to prepare unsymmetrical organoselenides catalysed by visible light. This protocol is an efficient and green method for the preparation of unsymmetrical organoselenides because metal-free conditions and readily accessible diselenides are used.
A highly efficient heterogeneous ruthenium(III)-catalyzed reaction of diaryl diselenides with alkyl halides leading to unsymmetrical diorganyl selenides
作者:Qiurong Chen、Pingping Wang、Tao Yan、Mingzhong Cai
DOI:10.1016/j.jorganchem.2017.04.004
日期:2017.7
A highly efficient heterogeneous ruthenium(III)-catalyzed reaction of diaryldiselenides with alkyl halides was achieved in DMF at 100 °C in the presence of 2 mol% of an MCM-41-immobilized bidentate nitrogen ruthenium(III) complex [MCM-41-2N-RuCl3] and zinc, yielding a variety of unsymmetrical diorganyl selenides in good to excellent yields. This new heterogeneous ruthenium catalyst can easily be prepared
The flash vacuum pyrolysis of benzyl phenyl selenides gave bibenzyls and diphenyl diselenide in excellent yields. This type of reaction was successfully applied to the synthesis of the title compounds.