Copper-catalyzed regiodivergent 1,4-and 1,6-conjugate silyl addition to diendioates: Access to functionalized allylsilanes
A copper-catalyzed regioselective 1,4-and 1,6-conjugate addition of a silyl reagent to diendioates was established. Various 1,4-and 1,6-protosilylation products were obtained in good yields and with high regioselectivity via tuning the ligands used in the reactions. This protocol has provided a simple and efficient method for the synthesis of multisubstituted functionalized allylsilanes.
Natural α-amino acid l-lysine-catalyzed knoevenagel condensations of α,β-unsaturated aldehydes and 1,3-dicarbonyl compounds
Knoevenagel condensations of α,β-unsaturated aldehydes and 1,3-dicarbonyl compounds were catalyzed by primary natural amino acid L-lysine. The reactions were carried out at room temperature in dimethylsulfoxide. It provides a facile entry to a wide variety of α,β,γ,δ- unsaturated dicarbonyl compounds. Supplemental materials are available for this article. Go to the publisher's online edition of Synthetic Communications to view the free supplemental file.
He, Yan-Hong,Hu, Ying,Guan, Zhi
experimental part
p. 1617 - 1628
(2011/06/21)
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