Asymmetric Transfer Hydrogenation of Imines in Water by Varying the Ratio of Formic Acid to Triethylamine
作者:Vaishali S. Shende、Sudhindra H. Deshpande、Savita K. Shingote、Anu Joseph、Ashutosh A. Kelkar
DOI:10.1021/acs.orglett.5b00889
日期:2015.6.19
Asymmetrictransferhydrogenation (ATH) of imines has been performed with variation in formic acid (F) and triethylamine (T) molar ratios in water. The F/T ratio is shown to affect both the reduction rate and enantioselectivity, with the optimum ratio being 1.1 in the ATH of imines with the Rh-(1S,2S)-TsDPEN catalyst. Use of methanol as a cosolvent enhanced reduction activity. A variety of imine substrates
Barbier; Rumpf, Bulletin de la Societe Chimique de France, 1953, p. 293,295
作者:Barbier、Rumpf
DOI:——
日期:——
Tetrahydroisoquinolines. I. 1-Alkyl-6,7-dihydroxy-1,2,3,4-tetrahydroisoquinolines<sup>1</sup>
作者:P. N. Craig、F. P. Nabenhauer、P. M. Williams、E. Macko、J. Toner
DOI:10.1021/ja01125a051
日期:1952.3
Identification of 3,4-Dihydroisoquinoline-2(1<i>H</i>)-sulfonamides as Potent Carbonic Anhydrase Inhibitors: Synthesis, Biological Evaluation, and Enzyme−Ligand X-ray Studies
作者:Rosaria Gitto、Stefano Agnello、Stefania Ferro、Laura De Luca、Daniela Vullo、Jiri Brynda、Pavel Mader、Claudiu T. Supuran、Alba Chimirri
DOI:10.1021/jm9014026
日期:2010.3.25
Following previous studies we herein report the exploration of the carbonic anhydrase (CA, EC 4.2.1.1) inhibitory effects and enzyme selectivity of a small class of 1-(cyclo)alkylisoquinolines containing a sulfonamide function considered a key feature for inhibiting CA. The results of enzymatic assays against human (h) CA isoforms, hCA I and hCA II (cytosolic, ubiquitous enzymes), hCA IX (transmembrane, tumor-associated), and hCA XIV (transmembrane), suggested that the presence of C-1 small substituents on isoquinoline scaffold controls both inhibitory potency and selectivity. Some derivatives showed potent hCA IX and hCA. XIV inhibitory effects at nanomolar concentrations as well as low affinity for the ubiquitous hCA II. Moreover, we report the X-ray crystal structure of one of these derivatives in complex with dominant human isoform II, thus confirming the sulfonamide zinc interactions. Finally, the results of docking experiments suggested the hypothetic interactions in the catalytic binding site for the most active and selective hCA IX and hCA XIV inhibitor.