A series of alpha-branched alpha,beta-unsaturated ketones were prepared via boron trifluoride etherate mediated reaction between arylalkynes and carboxaldehydes. The evaluation of the antiproliferative activity over hematological (NB4) and solid cancer (A549, MCF-7) cell lines provided a structure-activity relationship. 5-Parameter QSAR equations were built which were able to explain 80%-92% of the variance in activity. The resulting selective lead compound showed IC50 value 0.6 mu M against the hematological cell line and did not cause apoptosis, but blocked cell cycle in G0/G1. Moreover, it was demonstrated that this compound enhances and accelerates retinoic acid induced granulocytic differentiation. (C) 2015 Published by Elsevier Masson SAS.
A Cooperative Catalysis Approach to the Morita-Baylis-Hillman Reaction of Aryl Vinyl Ketones
作者:Kyungsoo Oh、Jian-Yuan Li
DOI:10.1055/s-0030-1260468
日期:2011.6
achieved for the first time through cooperative catalysis of proline and brucine N-oxide. A unique mode of activation of the aldehydes through proline iminium intermediates has been identified as a key reaction parameter for the successful MBH reaction of aryl vinyl ketones. The reaction pathways leading to 1:2 MBH products under typical nucleophiliccatalysis conditions were investigated. A systematic