6487-92-9Relevant academic research and scientific papers
Synthesis of N-aryloxyalkylanabasine derivatives
Slyn'Ko,Tatarova,Shakirov,Shul'Ts
, p. 294 - 301 (2013/07/26)
N-Aryloxyalkylanabasine derivatives were prepared via the reaction of anabasine hydrochloride with various aryloxyhaloalkanes in the presence of potash in DMF. The reaction occurred with retention of the chiral center C-(2) of the piperidine group. Side products of bis(aryloxy)ethanes were characterized.
Design of PAP-1, a selective small molecule Kv1.3 blocker, for the suppression of effector memory t cells in autoimmune diseases
Schmitz, Alexander,Sankaranarayanan, Ananthakrishnan,Azam, Philippe,Schmidt-Lassen, Kristina,Homerick, Daniel,Haensel, Wolfram,Wulff, Heike
, p. 1254 - 1270 (2007/10/03)
The lymphocyte K+ channel Kv1.3 constitutes an attractive pharmacological target for the selective suppression of terminally differentiated effector memory T (TEM) cells in T cell mediated autoimmune diseases, such as multiple sclerosis and type 1 diabetes. Unfortunately, none of the existing small molecule Kv1.3 blockers is selective, and many of them, such as correolide, 4-phenyl-4-[3-(methoxyphenyl)-3-oxo-2- azapropyl] cyclohexanone, and our own compound Psora-4 inhibit the cardiac K+ channel Kv1.5. By further exploring the structure activity relationship around Psora-4 through a combination of traditional medicinal chemistry and whole-cell patch-clamp, we identified a series of new phenoxyalkoxypsoralens that exhibit 2- to 50-fold selectivity for Kv1.3 over Kv1.5, depending on their exact substitution pattern. The most potent and "druglike" compound of this series, 5-(4-phenoxybutoxy)psoralen (PAP-1), blocks Kv1.3 in a use-dependent manner, with a Hill coefficient of 2 and an EC50 of 2 nM, by preferentially binding to the C-type inactivated state of the channel. PAP-1 is 23-fold selective over Kv1.5, 33- to 125-fold selective over other Kv1-family channels, and 500- to 7500-fold selective over Kv2.1, Kv3.1, Kv3.2, Kv4.2, HERG, calcium-activated K+ channels, Na+, Ca2+, and Cl- channels. PAP-1 does not exhibit cytotoxic or phototoxic effects, is negative in the Ames test, and affects cytochrome P450-dependent enzymes only at micromolar concentrations. PAP-1 potently inhibits the proliferation of human TEM cells and suppresses delayed type hypersensitivity, a TEM cell-mediated reaction, in rats. PAP-1 and several of its derivatives therefore constitute excellent new tools to further explore Kv1.3 as a target for immunosuppression and could potentially be developed into orally available immunomodulators. Copyright
Synthesis and stereochemical studies: Chemical and catalytic reductions of a new class of dihydropyrrole and tetrahydropyridine derivatives
Ghosh, Arindam,Bhattacharya, Sudin,Raychaudhuri, S. R.,Chatterjee, Amreshwar
, p. 299 - 309 (2007/10/02)
Tetrahydropyridine derivatives 1g,h on catalytic (PtO2/H2) or hydride (LAH or NaBH4) reductions afford stereoselectively the corresponding cis-amines 20a,b.Catalytic reduction of the dihydropyrrole derivative 1e gives a complex material; while NaBH4 reduc
