69478-76-8Relevant academic research and scientific papers
γ-Al2O3/triflic acid as cooperative catalysts for the tandem Michael addition/carbocyclization: An easy access to 2-substituted pyrrolo[2,1-a]isoquinolines and 3-substituted pyrrolidine-2,5-diones
Rao, Ramana Sreenivasa,Sahani, Anita,Ali, Sheikh Haider,Pradhan, Sumanta,Ramanathan, Chinnasamy Ramaraj
, p. 1415 - 1428 (2021)
A tandem Michael addition/carbocyclization of 3,4-dimethoxyphenethyl maleimide with carbon and sulfur nucleophiles is accomplished via a relay catalysis using γ-Al2O3/TfOH binary system. The X-ray Photoelectron Spectroscopy (XPS) ana
Silyl Radical-Mediated Activation of Sulfamoyl Chlorides Enables Direct Access to Aliphatic Sulfonamides from Alkenes
Gouverneur, Véronique,Hell, Sandrine M.,Laudadio, Gabriele,Meyer, Claudio F.,Misale, Antonio,No?l, Timothy,Trabanco, Andrés A.,Willis, Michael C.
supporting information, p. 720 - 725 (2020/02/20)
Single electron reduction is more challenging for sulfamoyl chlorides than sulfonyl chlorides. However, sulfamoyl and sulfonyl chlorides can be easily activated by Cl-atom abstraction by a silyl radical with similar rates. This latter mode of activation was therefore selected to access aliphatic sulfonamides, applying a single-step hydrosulfamoylation using inexpensive olefins, tris(trimethylsilyl)silane, and photocatalyst Eosin Y. This late-stage functionalization protocol generates molecules as complex as sulfonamide-containing cyclobutyl-spirooxindoles for direct use in medicinal chemistry.
Dibenzo-epines: Effect of the basic side-chain on neuroleptic activity
Burki,Fischer,Hunziker,et al.
, p. 479 - 485 (2007/10/05)
Structure-activity relationships in a series of dibenzo[b,f][1,4]thiazepines and -oxazepines and dibenzo[b,e][1,4]diazepines having different basic substituents in the 11-position were studied with reference to their neuroleptic activity. A high degree of structure-specificity was found for the piperazinyl moiety as well as for the distances between the distal nitrogen atom of this group and the tricyclic ring system, which distances are probably of importance for receptor binding. It was shown that the N-oxides of the neuroleptic agents clotiapine, loxapine and clozapine were inactive in in vitro binding tests involving central dopaminergic receptors, and it is very likely therefore that the in vivo activity of these N-oxides in the rat is due to their enzymatic reduction to the active parent compounds. All derivatives having a basic side-chain other than N-alkylpiperazinyl were inactive neuroleptically, with the exception of the N-methyl-4-piperidyl derivative which showed relatively weak effects.
