6642-39-3Relevant articles and documents
Bimetallic Catalysis: Asymmetric Transfer Hydrogenation of Sterically Hindered Ketones Catalyzed by Ruthenium and Potassium
Slagbrand, Tove,Kivij?rvi, Tove,Adolfsson, Hans
, p. 3445 - 3449 (2015/11/10)
An efficient protocol for the asymmetric reduction of sterically hindered ketones under transfer-hydrogenation conditions was developed. The corresponding chiral alcohols were obtained in good to excellent yields with enantiomeric excess values up to 99 %. The role of the cation associated with the base present in the reduction reaction was investigated. In contrast to previous studies on this catalyst system, potassium ions rather than lithium ions significantly enhanced the reaction outcome.
Reaction of secondary and tertiary aliphatic halides with aromatic aldehydes mediated by chromium(II): a selective cross-coupling of alkyl and ketyl radicals
Wessjohann, Ludger A.,Schmidt, Gisela,Schrekker, Henri S.
, p. 2134 - 2142 (2008/09/18)
Takai-Utimoto reactions with secondary and tertiary aliphatic halides usually failed according to previous reports. Now, significant improvements could be achieved, and especially secondary aliphatic halides can be coupled to aromatic aldehydes in yields of up to >95%. A variety of processes are competing with the desired one, and thus conditions must be adapted to the nature of the aldehyde as well as the aliphatic halide used, as the outcome of these reactions is strongly affected by the putative radical intermediates.
Hypercoordinafion of boron and aluminum: Synthetic utility as chelating lewis acids [7]
Ooi,Uraguchi,Kagoshima,Maruoka
, p. 5327 - 5328 (2007/10/03)
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