An efficient one-pot route to synthesize tertiary alcohol compounds using Barbier–Grignard reaction of unactivated alkyl or arylbromides with ester in THF at 65 °C catalyzed by CuO has been developed and systematically investigated. A wide range of substituted tertiary alcohol compounds were obtained in good to high yields. The reaction is highly chemoselective. The mechanism involving the leaving
Doing the methylene shuffle – Further insights into the inhibition of mitotic kinesin Eg5 with S-trityl l-cysteine
作者:Murad N. Abualhasan、James A.D. Good、Kitiyaporn Wittayanarakul、Nahoum G. Anthony、Giacomo Berretta、Oliver Rath、Frank Kozielski、Oliver B. Sutcliffe、Simon P. Mackay
DOI:10.1016/j.ejmech.2012.05.034
日期:2012.8
S-Trityl L-cysteine (STLC) is an inhibitor of the mitotic kinesin Eg5 with potential as an antimitotic chemotherapeutic agent. We previously reported the crystal structure of the ligand protein complex, and now for the first time, have quantified the interactions using a molecular dynamics based approach. Based on these data, we have explored the SAR of the trityl head group using the methylene shuffle strategy to expand the occupation of one of the hydrophobic pockets. The most potent compounds exhibit strong (<100 nM) inhibition of Eg5 in the basal ATPase assay and inhibit growth in a variety of tumour-derived cell lines. (C) 2012 Elsevier Masson SAS. All rights reserved.
Palladium-catalysed direct synthesis of benzo[b]thiophenes from thioenols
作者:Kiyofumi Inamoto、Yukari Arai、Kou Hiroya、Takayuki Doi
DOI:10.1039/b811362a
日期:——
The one-pot conversion of thioenols into benzo[b]thiophenes was achieved by using a simple palladium catalyst such as PdCl(2) or PdCl(2)(cod).