Oxidative bromination of ketones using ammonium bromide and oxone®
作者:Arun Kumar Macharla、Rohitha Chozhiyath Nappunni、Mahender Reddy Marri、Swamy Peraka、Narender Nama
DOI:10.1016/j.tetlet.2011.11.011
日期:2012.1
esters and α,α-dibromination of 1,3-diketones and β-keto esters without catalyst is reported using ammonium bromide as a bromine source and oxone® as an oxidant. The reaction proceeds at ambient temperature and yields range from moderate to excellent. Bromination of unsymmetrical ketones takes place at the less substituted α-position predominantly. Aromatisation of tetralones is also carried out with this
A series of erythro-1-(2-hydroxy-3-nonyl)azole derivatives have been synthesized and evaluated for adenosinedeaminase (ADA) inhibitory activity, in order to introduce simplifications in the ADA inhibitor erythro-9-(2-hydroxy-3-nonyl)adenine (EHNA, 1a). The synthesis of most of the reported compounds was achieved by reaction of 2-bromo-3-nonanone with the suitable azole followed by reduction of the
Novel, Highly Potent Adenosine Deaminase Inhibitors Containing the Pyrazolo[3,4-<i>d</i>]pyrimidine Ring System. Synthesis, Structure−Activity Relationships, and Molecular Modeling Studies
作者:Federico Da Settimo、Giampaolo Primofiore、Concettina La Motta、Sabrina Taliani、Francesca Simorini、Anna Maria Marini、Laura Mugnaini、Antonio Lavecchia、Ettore Novellino、Daniela Tuscano、Claudia Martini
DOI:10.1021/jm050136d
日期:2005.8.1
This study reports the synthesis of a number of 1- and 2-alkyl derivatives of the 4-aminopyrazolo[3,4-d]pyrimidine (APP) nucleus and their evaluation as inhibitors of ADA from bovine spleen. The 2-substituted aminopyrazolopyrimidines proved to be potentinhibitors, most of them exhibiting K(i) values in the nanomolar/subnanomolar range. In this series the inhibitory activity is enhanced with the increase
Treatment of benzyl bromoacetate with 3-butenylgallium dichloride in ether in the presence of a catalytic amount of Et3B as a radical initiator provided benzyl 3-cyclopropylpropanoate in 64% yield via a radical addition–substitution sequence. The use of 3-butenylindium dichloride in place of the gallium reagent also afforded the same product in good yield.
Synthesis and biological effects of acyclic pyrimidine nucleoside analogs
作者:Alan C. Schroeder、Robert G. Hughes、Alexander Bloch
DOI:10.1021/jm00141a012
日期:1981.9
K-12, the most potent among these, 1-[(2-hydroxyethoxy)methyl]-5-fluorouracil being active at an IC50 of 1.2 micro M. This compound was equally active in preventing the growth of a 5-fluorouracil resistant strain of E. coli. Some of the analogues were also found to selectively interfere with herpes simplex virus replication in vitro. None of the cytosine derivatives tested served as either substrates