Site-Selective Mono-Oxidation of 1,2-Bis(boronates)
作者:Lu Yan、James P. Morken
DOI:10.1021/acs.orglett.9b01204
日期:2019.5.17
Site-selective oxidation of vicinal bis(boronates) is accomplished through the use of trimethylamineN-oxide in 1-butanol solvent. The reaction occurs with good efficiency and selectivity across a range of substrates, providing 2-hydro-1-boronic esters which are shown to be versatile intermediates in the synthesis of chiral building blocks.
One-Pot Transformation of Simple Furans into Octahydroindole Scaffolds
作者:Dimitris Kalaitzakis、Myron Triantafyllakis、Georgios I. Ioannou、Georgios Vassilikogiannakis
DOI:10.1002/anie.201700620
日期:2017.3.27
A highly efficient and general singlet‐oxygen‐initiated one‐pot transformation of readily accessible furans into octahydroindolescaffolds has been developed.
已经开发了一种高效且通用的单线态氧引发的单锅法,将易得的呋喃转化为八氢吲哚支架。
The Power of Triplet and Singlet Oxygen in Synthesis: 2-Oxindoles, 3-Hydroxy-2-oxindoles, and Isatins from Furans
A straightforward synthesis of substituted 2-oxindoles, 3-hydroxy-2-oxindoles, and isatins has been developed. Easily accessible furans were transformed into tetrahydropyranopyrrolones by a singlet oxygen initiated cascade reaction sequence. An acid-catalyzedrearrangement, followed by aromatization, gave access to a variety of 2-oxindole motifs, which were oxidized to 3-hydroxy-2-oxindoles or isatins
Ring-Rearrangement Metathesis (RRM) Mediated by Ruthenium-Indenylidene Complexes
作者:Hervé Clavier、Julie Broggi、Steven P. Nolan
DOI:10.1002/ejoc.200901316
日期:2010.2
Several ruthenium-indenylidenecomplexes bearing N-heterocyclic carbenes (NHCs) and phosphanes have been investigated for the ring rearrangement of cyclic compounds by alkene metathesis. These catalysts were found to promote efficiently such domino reactions, especially sterically hindered NHC-containing complexes. Moreover, indenylidene-type catalysts were compared to benzylidene- and Hoveyda-type
A range of 1-azaspirocycles, spiroaminals and 1,6-diazaspirocycles has been synthesized, starting from simple and readily accessible furan precursors, using a cascade reaction sequence initiated by singlet oxygen.