Ungesättigte Oxime, 18. Mitt. Dichlorphenyl-alkenone und ihre Oxime
作者:Bernard Unterhalt
DOI:10.1002/ardp.19783110313
日期:——
Einige Dichlorbenzaldehyde werden mit Aceton oder Butanon zu den Ketonen 1, 3 und 4 kondensiert. Mit 2,6‐Dichlorbenzaldehyd und Butanon entsteht neben 3c und 4c das kristalline Aldol 7. Alle ungesättigten Ketone werden oximiert und die Oxime 2und5 dc getrennt.
Novel Dipolar CycloadditionReactions of Zwitterionic Species Generated from Dimethoxycarbeneand Dimethyl Acetylenedicarboxylate with Carbonyl Compounds: FacileSynthesis of Dihydrofuran Derivatives
The reaction of 1:1 zwitterionic species, generated in situ by the addition of dimethoxycarbene to dimethyl acetylenedicarboxylate, towards carbonyl compounds is described. The reactions presented offer a one-pot synthesis of dihydrofuran and spiro dihydrofuran derivatives in high yields.
The Preparation and Bacteriostatic Activity of Substituted Ureas
作者:David J. Beaver、Daniel P. Roman、Paul J. Stoffel
DOI:10.1021/ja01562a053
日期:1957.3
2,6-Bis(3,4,5-trihydroxybenzylydene) derivatives of cyclohexanone
作者:Roberta Costi、Roberto Di Santo、Marino Artico、Silvio Massa、Rino Ragno、Roberta Loddo、Massimiliano La Colla、Enzo Tramontano、Paolo La Colla、Alessandra Pani
DOI:10.1016/j.bmc.2003.10.005
日期:2004.1
A number of 2,6-bisbenzylidenecyclohexane-1-one derivatives have been synthesized and tested as HIV-1 integrase (IN) inhibitors with the aim of obtaining compounds capable to elicit antiviral activity at non-cytotoxic concentrations in cell-based assays. 3,5-Bis(3,4,5-trihydroxybenzylidene)-4-oxocyclohexaneacetic acid (20d) resulted one of the most potent and selective derivatives in acutely infected MT-4 cells (EC50 and CC50 values of 2 and 40 muM, respectively). In enzyme assays with recombinant HIV-1 integrase (rIN), this compound proved able to inhibit both 3'-processing and disintegration with IC50 values of 0.2 and 0.5 muM, respectively. In order to develop a model capable to predict the anti HIV-IN activity and useful to design novel derivatives, we performed a comparative molecular field analysis (CoMFA) like 3-D-QSAR. In our model the ligands were described quantitatively in the GRID program, and the model was optimized by selecting only the most informative variables in the GOLPE program. We found the predictive ability of the model to increase significantly when the number of variables was reduced from 20,925 to 1327. A Q(2) of 0.73 was obtained with the final model, confirming the predictive ability of the model. By studying the PLS coefficients in informative 3-D contour plots, ideas for the synthesis of new compounds could be generated. (C) 2003 Elsevier Ltd. All rights reserved.
A Novel Approach to the Synthesis of Bicyclic Lactones via an Interrupted Nazarov Reaction of <i>g</i><i>em</i>-Divinyl Dihydrofurans