122344-55-2Relevant academic research and scientific papers
3-Aryl-1,2-diacetamidopropane derivatives as novel and potent NK-1 receptor antagonists
Hipskind, Philip A.,Howbert, J. Jeffry,Bruns, Robert F.,Cho, Steven S. Y.,Crowell, Thomas A.,Foreman, Mark M.,Gehlert, Donald R.,Iyengar, Smriti,Johnson, Kirk W.,Krushinski, Joseph H.,Li, Dominic L.,Lobb, Karen L.,Mason, Norman R.,Muehl, Brian S.,Nixon, James A.,Phebus, Lee A.,Regoli, Domenico,Simmons, Rosa M.,Threlkeld, Penny G.,Waters, Diane C.,Gitter, Bruce D.
, p. 736 - 748 (2007/10/03)
Early structure-activity studies on racemic tryptophan ester and amide NK- 1 antagonists 5-7 led to the discovery that the potency of the series could be markedly increased by moving the carbonyl function in these molecules to an off-chain position as in the 3-aryl-1,2-diacetamidopropane 9. Further medicinal chemistry incorporating this change resulted in the discovery of a novel series of highly potent aryl amino acid derived NK-1 antagonists of the R stereoisomeric series (IC50's = 100 pM to >5 μM). Compounds in this series were shown to be competitive antagonists using an in vitro NK-1 smooth muscle assay, and this data correlated well with observed human NK-1 binding affinities. Two of these agents, (R)-25 and (R)-32, blocked intrathecal NK-1 agonist-driven [Ac-[Arg6, Sar9, Met(O2)11]-substance P 6-11 (Ac-Sar9)] nociceptive behavior in mice. Both compounds potently blocked the neurogenic dural inflammation following trigeminal ganglion stimulation in the guinea pig after intravenous administration. Further, upon oral administration in this model, (R)-32 was observed to be very potent (ID50 = 91 ng/kg) and have a long duration of action (>8 h at 1 μg/kg). Compound (R)-32, designated LY303870, is currently under clinical development as an NK-1 antagonist with a long duration of action.
A NEW AND CONVENIENT ROUTE TO THE AMIDES OF α-AMINO ACIDS AND α-HYDROXY ACIDS BY MEANS OF THE PALLADIUM CATALYZED FACILE CLEAVAGE OF 3-SUBSTITUTED-4-ARYLAZETIDIN-2-ONES
Ojima, Iwao,Suga, Shigemi,Abe, Rumiko
, p. 853 - 856 (2007/10/02)
3-Substituted-4-arylazetidin-2-ones were found to be cleaved selectively at the N-C4 bond by the hydrogenolysis on palladium catalyst to give the corresponding amides of α-amino acids or α-hydroxy acids in excellent yields.
