A series of new 2H-benzo[1,4]thiazine derivatives were synthesized from aroylmethylidene malonates and o-aminothiophenols by condensation/cyclization methodology in order to evaluate their COX-2 inhibitory activity. In-silico studies indicated that among the synthesized compounds, 5i could serve as a potential candidate for the task. So, compound 5i was taken as a model ligand for in vitro studies
Boron Trifluoride-Promoted Indium(III) Triflate-Catalyzed Sequential One-Pot Synthesis of (1,2-Diaryl-2-oxoethyl)malonates from<i>trans</i>-2-Aryl-3-nitrocyclopropane-1,1-dicarboxylates and Activated Arenes
作者:Thangavel Selvi、Kannupal Srinivasan
DOI:10.1002/adsc.201500143
日期:2015.6.15
A sequential one‐pot synthesis of Michael adducts of aroylmethylidenemalonates with activated aromatics is described. The method involves treatment of trans‐2‐aryl‐3‐nitro‐cyclopropane‐1,1‐dicarboxylates with boron trifluoride etherate to form aroylmethylidenemalonates in situ and then addition of activated aromatics such as indoles, carbazole, pyrrole, thiophenes, methoxybenzenes and benzodioxole
An efficient asymmetric organocatalytic conjugate addition reaction of pyrazolin-5-ones with arylomethylidene malonates has been successfully developed by employing bifunctional Cinchona derived thiourea organocatalysts. The protocol provides straightforward access to pyrazole substituted scaffolds in good yields with high stereocontrol.
A two-step synthesis of 2,3-disubstituted thiophenes from trans-2-aryl-3-nitrocyclopropane-1,1-dicarboxylates and 1,4-dithiane-2,5-diol is described. The nitrocyclopropane dicarboxylates when treated with boron trifluoride etherate formed aroylmethylidene malonates in situ through ring-opening followed by rearrangement and a Nef reaction, and subsequent addition of 1,4-dithiane-2,5-diol and triethylamine