Highly Chemoselective Reduction of Amides (Primary, Secondary, Tertiary) to Alcohols using SmI<sub>2</sub>/Amine/H<sub>2</sub>O under Mild Conditions
作者:Michal Szostak、Malcolm Spain、Andrew J. Eberhart、David J. Procter
DOI:10.1021/ja412578t
日期:2014.2.12
Highly chemoselective direct reduction of primary, secondary, and tertiary amides to alcohols using SmI2/amine/H2O is reported. The reaction proceeds with C–N bond cleavage in the carbinolamine intermediate, shows excellent functional group tolerance, and delivers the alcohol products in very high yields. The expected C–O cleavage products are not formed under the reaction conditions. The observed
Mechanism of SmI<sub>2</sub>/Amine/H<sub>2</sub>O-Promoted Chemoselective Reductions of Carboxylic Acid Derivatives (Esters, Acids, and Amides) to Alcohols
作者:Michal Szostak、Malcolm Spain、Andrew J. Eberhart、David J. Procter
DOI:10.1021/jo5018525
日期:2014.12.19
Samarium(II) iodide–water–amine reagents have emerged as some of the most powerful reagents (E° = −2.8 V) for the reduction of unactivated carboxylic acid derivatives to primaryalcohols under single electron transfer conditions, a transformation that had been considered to lie outside the scope of the classic SmI2 reductant for more than 30 years. In this article, we present a detailed mechanistic
Palladium-catalyzed selective hydrogenolysis of N-alkyl(aryl)-substituted γ-keto amides as an approach to γ-lactams or linear amides
作者:O. V. Turova、V. G. Berezhnaya、E. V. Starodubtseva、M. G. Vinogradov
DOI:10.1007/s11172-015-0978-3
日期:2015.5
A palladium-catalyzed hydrogenolysis of N-substituted γ-keto amides can proceed with participation of tautomeric 5-hydroxypyrrolidin-2-ones and give either pyrrolidin-2-ones, or linear amides, or their mixtures, depending on the substrate structure.