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
carbonyl-substituted (arylsulfinyl)methylradicals is presented, based on experimental results and semiempirical calculations. The influence of dipole-dipole interactions, allylic 1,3-strain (A1,3 strain), allylic 1,2-strain (A1,2 strain), and coulombic interactions is discussed based on stereoselectivities observed with (alkoxycarbonyl)-, cyano-, and aryl-substituted (arylsulfinyl)methylradicals. In the second part
A mild and chemoselective CALB biocatalysed synthesis of sulfoxides exploiting the dual role of AcOEt as solvent and reagent
作者:Silvia Anselmi、Siyu Liu、Seong-Heun Kim、Sarah M. Barry、Thomas S. Moody、Daniele Castagnolo
DOI:10.1039/d0ob01966f
日期:——
Sulfoxides have been synthesised from various sulfide substrates under mild conditions exploiting CALB biocatalyst in the presence of urea hydrogen peroxide and AcOEt which acts with the dual role of solvent and reagent.
Investigation of the reaction of α-thioamides, α-esters and α-nitriles with N-halosuccinimides
作者:Marie Kissane、Maureen Murphy、Denis Lynch、Alan Ford、Anita R. Maguire
DOI:10.1016/j.tet.2008.05.026
日期:2008.8
Investigation of the reaction of α-thioamides, α-esters and α-nitriles with NBS and NCS is described. The scope of this stereoselective oxidative transformation to the β-haloacrylamides, β-acrylates and β-acrylonitriles has been determined. A mechanistic rationale to explain the observed differences in reactivity between the amide, ester and nitrile series is proposed.
A cobaloxime-mediated radical route to butenolides
作者:Bruce P. Branchaud、Rachel M. Slade、Samantha K. Janisse
DOI:10.1016/s0040-4039(00)61501-0
日期:1993.12
be converted by oxidation and thermal syn elimination into 3-substituted maleic anhydrides, which are known to be regioselectively and chemoselectively reduced to produce γ-hydroxybutenolides or butenolides.