1.1. 10 Stereoselective Conjugate Addition of Methyl and Cyanide
Buch
Herausgeber: van Leeuwen, P. W. N. M.
Titel: C-1 Building Blocks in Organic Synthesis 1
Untertitel: Additions to Alkenes, Alkynes, and Carbonyl Compounds
Print ISBN: 9783131707611; Online ISBN: 9783132064416; Buch-DOI: 10.1055/b-003-125818
1st edition © 2014. Thieme. All rights reserved.
Georg Thieme Verlag KG, Stuttgart
Fachgebiete: C1-bildende Blöcke in der organischen Synthese
Science of Synthesis Reference Libraries
Übergeordnete Publikation
Titel: Science of Synthesis
DOI: 10.1055/b-00000101
Typ: Mehrbändiges Werk
Abstract
Conjugate additions of methyl and cyanide nucleophiles to Michael acceptors are powerful methods for stereoselective homologation. New ligands and a variety of copper sources today enable highly enantioselective nucleophilic 1,4-methylations. Besides Grignard reagents, methylzinc reagents and trimethylaluminum are well established as nucleophilic methyl sources. Enantioselective cyanations of alkenes, aldehydes, or imines can be accomplished with metal catalysts (e.g., based on nickel, aluminum, or titanium) or organocatalysts, mostly employing silyl cyanides or acetone cyanohydrin as the cyanide source.
Schlüsselwörter
copper catalysts - methyl Grignard reagents - methylaluminum reagents - cyanide - asymmetric catalysis - asymmetric synthesis - conjugate addition - CC bonds - carbonheteroatom bonds - Michael acceptors - nucleophilic addition- 1 Tomioka K, Nagaoka Y, Comprehensive Asymmetric Catalysis. Jacobsen EN, Pfaltz A, Yamamoto H. Springer; Heidelberg 1999. 3.
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