An easy access to halogenated and non-halogenated spiro-hexadienones
作者:Lucimara J. Martins、Bruno R.V. Ferreira、Wanda P. Almeida、Marcelo Lancellotti、Fernando Coelho
DOI:10.1016/j.tetlet.2014.07.114
日期:2014.9
Nájera oxime-derived palladacycles catalyze intermolecular Heck reaction with Morita–Baylis–Hillman adducts. An improved and highly efficient synthesis of α-benzyl-β-ketoesters
作者:Bruno R.V. Ferreira、Rodrigo V. Pirovani、Luis G. Souza-Filho、Fernando Coelho
DOI:10.1016/j.tet.2009.06.084
日期:2009.9
An improved and highly efficient synthesis of several alpha-benzyl-beta-ketoesters from Morita-Baylis-Hillman adducts is described. These adducts were used as substrates for an intermolecular Heck reaction catalyzed by a Najera oxime-derived palladacycles. These efficient catalytic conditions probed to be very selective providing only the corresponding functionalized beta-ketoesters in high yield with no decarboxylation product. It seems that the method herein described is one of the most efficient for the synthesis of alpha-benzyl-beta-ketoesters. (C) 2009 Elsevier Ltd. All rights reserved.