Enantioselective Henry Addition of Methyl 4-Nitrobutyrate to Aldehydes. Chiral Building Blocks for 2-Pyrrolidinones and Other Derivatives
作者:Gonzalo Blay、Víctor Hernández-Olmos、José R. Pedro
DOI:10.1021/ol1010888
日期:2010.7.2
enantioselective Henry addition of methyl 4-nitrobutyrate to aldehydes using a Cu(II)−amino pyridine complex as catalyst is described. The products resulting from this reaction constitute a new, highly versatile family of chiralbuildingblocks as a result of the presence of three different functional groups on the molecule. These products have been transformed into nonracemic chiral γ-lactams, 5-hydroxy-5-substituted
A study of the structure-cytotoxic activity of the acetogenin of Annonaceae, muricatacin 1, is reported. Indeed, muricatacin 1 has shown promising antitumoral activity. Therefore several 5-hydroxy-4-alkanolides were prepared and then tested against KB and VERO cell lines. A few other analogues were synthesized and tested against both cell lines. Thus this work allowed us to better determine the pharmacophore of the molecule and to propose muricatacin 1 instead of a more complicated acetogenin of Annonaceae as a lead compound in the search for new antineoplastic agents.
Stereoselective synthesis of (5S,6S)- and (5S,6R)-aza-muricatacin from an l-glutamic acid derivative
作者:José M. Andrés、Noemı́ de Elena、Rafael Pedrosa、Alfonso Pérez-Encabo
DOI:10.1016/s0957-4166(01)00251-8
日期:2001.6
A stereodivergent synthesis of threo and erythro aza-muricatacin. a non-natural aza-analogue of the bioactive annonaceous acetogenin muricatacin, is presented. The configuration of the C(5) stereocenter is controlled by diastereoselective alkylation of alpha -dibenzylamino aldehyde I or diastercoselective reduction of alpha -dibenzylamino ketone 3. (C) 2001 Elsevier Science Ltd. All rights reserved.