WebOct 1, 2024 · This semireduction proceeds chemoselectively in the presence of other functional groups, which are typically reduced using conventional hydrogenations. Isotopic labelling studies support a ... WebNov 2, 2024 · The treatment of PdCl2 with K2CO3 and HCO2H in dioxane gives black precipitates, which are an effective catalyst for the semireduction of alkynes to alkenes using formic acid as a reductant. Even 0.05 mol % Pd promoted the reduction reaction of tolane in h …
A Selective Ru-Catalyzed Semireduction of Alkynes to
WebSep 27, 2024 · We report a chemoselective, phosphine-catalyzed semireduction of primary and secondary propiolamides. In the presence of stoichiometric pinacolborane and catalytic n-tributylphosphine, a variety of propiolamides were successfully converted to the corresponding acrylamides in excellent yield with (E)-stereoselectivity.The reaction … Websemireduction of primary and secondary propiolamides to their respective (E)-cinnamamides in the presence of catalytic n-tributylphosphine and stoichiometric pinacolborane. We surveyed the scope and reactivity of substrates bearing N-substitutions, electron-rich or deficient aryls, and aliphatics using optimized reaction conditions and ... duluth walk in clinics
Heterogeneous Gold‐Catalyzed Selective Semireduction of …
WebApr 14, 2014 · A new efficient method for chemo- and regio-selective semireduction of alkynes using CO/H2O as the hydrogen source catalyzed by gold supported on high surface area TiO2 was developed. WebSep 4, 2024 · We report a transition-metal-free trans-selective semireduction of alkynes with pinacolborane and catalytic potassium tert-butoxide. A variety of 3-substituted primary … WebA convenient and robust protocol for the selective transfer semireduction of alkynes was developed, using bio-renewable formic acid as the hydrogen source and easily handled supported gold nanoparticles as the catalyst. duluth walking trails