Aryl(sulfonyl)amino Group: A Convenient and Stable Yet Activated Modification of Amino Group for Its Intramolecular Displacement
摘要:
Aryl(sulfonyl)amino groups, readily derived from sulfonyl- or arylamines by standard methods as well as the recently introduced methods of sulfonylation and arylation, proved to be good leaving groups in intramolecular substitution reactions by various nitrogen, oxygen, and carbon nucleophiles.
Amide derivatives of the general formulae Ia and Ib:
are disclosed. Pharmaceutical compositions containing these compounds, and methods for their use, inter alia, for treating and/or preventing gastrointestinal disorders, pain, and pruritus are also disclosed.
A novel, rapid, and environmentally-friendly protocol for the synthesis of sulfonamides using iodine as catalyst under solvent-free conditions is described. This method involves the oxidative coupling of sulfonyl hydrazides and amines in the presence of catalytic amount of iodine using TBHP as oxidant. This protocol does not require purification techniques such as column chromatography and recrystalization
<scp>Synthesis and molecular docking studies of novel tricyclic and angular tetracyclic benzothiadiazines</scp> via <i>sp<sup>3</sup>‐C‐H</i><scp>activation as potential colon cancer inhibitors</scp>
作者:Sherif O. Kolade、Oluwafemi S. Aina、Allen T. Gordon、Eric C. Hosten、Idris A. Olasupo、Adeniyi S. Ogunlaja、Olayinka T. Asekun、Oluwole B. Familoni
DOI:10.1002/jhet.4715
日期:2023.10
This paper describes the synthesis of tricyclic and tetracyclic benzothiadiazines and their derivatives, which are known for their versatility as bioactive agents. The starting materials were N-cycloamino-4-substituted-2-nitrobenzenesulfonamides 8–16, which were prepared through the condensation of 4-substituted-2-nitrobenzenesulfonyl chlorides 1–3 and cyclic amines 4–7. The intermediates, N-cyclo
Redox-Neutral α-Amino C–H Functionalization: When the Catalyst Is Also the Nucleophile
作者:Saad Shaaban、Joongsuk Oh、Nuno Maulide
DOI:10.1021/acs.orglett.5b03431
日期:2016.2.5
A redox-neutral functionalization of cyclic amines that leads to acyclic products is presented. The reaction hinges on generation of transient aryl radical intermediates by catalytic activation with a simple hydrazine. Those aryl radicals subsequently undergo translocation and further oxidation prior to trapping with the same hydrazine, thus resulting in an overall process where the catalyst unusually also acts as the nucleophile.