A Pd/C catalyzed reductive carbonylation of nitroarenes for the synthesis of unsymmetricalureas has been developed. Using inexpensive and stable nitroarenes as the substrates, a series of unsymmetricalureas were produced in moderate to good yields. A range of functional groups including thioethers, halides and vinyl were compatible with this reaction. As a heterogeneous catalyst, Pd/C was recycled
A series of N-alkyl substituted urea derivatives were synthesized and evaluated for their in vitro antibacterial and antifungal activities. The N-alkyl substituted urea derivatives bearing morpholine moiety (3a–3k) showed better activities than those bearing diethylamine moiety (2a–2f). Compounds having fluoro substituent at ortho (3c) and para (3b) positions of the phenyl ring exhibited potent antimicrobial
Efficient Direct Halogenation of Unsymmetrical N-Benzyl- and N-Phenylureas with Trihaloisocyanuric Acids
作者:Lúcia de Aguiar、Marcio de Mattos、Carlos Sanabria、Bruno Costa、Gil Viana
DOI:10.1055/s-0036-1589149
日期:2018.3
halogenation of N-phenylureas was developed using trihaloisocyanuric acids in acetonitrile at room temperature. This protocol proved to be effective for the construction of N-phenylureas with different patterns of substitution. Additionally, less reactive N-benzylureas were halogenated in the presence of a mixture of trifluoroacetic acid and acetonitrile at room temperature. A simple and efficient methodology
Synthesis and biological evaluation of novel tamoxifen analogues
作者:Michael S. Christodoulou、Nikolas Fokialakis、Daniele Passarella、Aída Nelly García-Argáez、Ornella Maria Gia、Ingemar Pongratz、Lisa Dalla Via、Serkos A. Haroutounian
DOI:10.1016/j.bmc.2013.05.012
日期:2013.7
reaction was used as the key synthetic step in the preparation of these analogues and the structural assignment of E, Z isomers was determined on the basis of 2D-NOESY experiments. The compounds were evaluated for their antiproliferative activity on breast cancer (MCF-7), cervix adenocarcinoma (HeLa) and biphasic mesothelioma (MSTO-211H) human tumor cell lines. The estrogen like properties of the novel