Regioselective Intramolecular [3+2] Annulation of Allene-Nitrones
نویسندگان
چکیده
منابع مشابه
Regioselective intramolecular [3+2] annulation of allene-nitrones.
The regioselective intramolecular 1,3-dipolar cycloaddition of the phenylsulfonylallene-nitrone derivatives has been developed. This reaction showed that the distal double bond of the allene exclusively reacted with the nitrone group to produce the bicyclic isoxazolidine derivatives regardless of the substitution pattern on the allenyl moiety.
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Advances in hydroarylation have been achieved by the development of a one-pot regioselective allene hydrosilylation/Pd(0)-catalyzed cross-coupling protocol. The regioselectivity is primarily governed by N-heterocyclic carbene (NHC) ligand identity in the hydrosilylation step and is preserved in the subsequent cross-coupling reaction. This methodology affords streamlined access to functionalized...
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A novel Pd-catalyzed regioselective intramolecular aminofluorination of unactivated alkenes has been developed, which is an efficient method for the synthesis of a variety of monofluoromethylated nitrogen-containing heterocycles.
متن کاملOrganocatalysis "on water". Regioselective [3 + 2]-cycloaddition of nitrones and allenolates.
The first example of a regioselective and organocatalyzed 1,3-dipolar cycloaddition reaction between conjugated alkynoates and nitrones "on water" is described.
متن کاملRegioselective allene hydrosilylation catalyzed by N-heterocyclic carbene complexes of nickel and palladium.
Regioselective methods for allene hydrosilylation have been developed, with regioselectivity being governed primarily by the choice of metal. Alkenylsilanes are produced via nickel catalysis with larger N-heterocyclic carbene (NHC) ligands, and allylsilanes are produced via palladium catalysis with smaller NHC ligands. These complementary methods allow either regioisomeric product to be obtaine...
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ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 2012
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.60.381