Rhodium-catalysed addition of organotrialkoxysilanes to α-substituted acrylic esters
作者:Jonathan D. Hargrave、Jennifer Herbert、Gerwyn Bish、Christopher G. Frost
DOI:10.1039/b606977k
日期:——
The cationic rhodium complex [Rh(cod)2][BF4] effectively catalyses the 1,4-addition of organotrialkoxysilanes to alpha-substituted acrylicesters. The reactions are promoted by heating in an oil-bath or more conveniently in a microwave reactor allowing rapid access to a useful range of functionalised products including 2-alkyl succinates and alpha-amino acid derivatives.
The rhodium-catalysed addition of boronic acids to α-substituted activated alkenes proceeds smoothly in water resulting in a unique synthesis of both succinic esters and β 2 -amino acid derivatives.
Rhodium-catalysed 1,4-addition–halogenation: the crucial role of lithium halide
作者:Jérôme Le Nôtre、Christopher G. Frost
DOI:10.1016/j.tetlet.2008.08.047
日期:2008.10
The rhodium-catalysed 1,4-addition-iodination or 1,4-addition-bromination of dimethylitaconate has been accomplished in high yield using arylzinc reagents and electrophilic halogenating agents. The product distribution is influenced by the presence of specific lithium halide salts. (C) 2008 Elsevier Ltd. All rights reserved.