2-Iminopyrrolidines as Potent and Selective Inhibitors of Human Inducible Nitric Oxide Synthase
摘要:
A series of substituted 2-iminopyrrolidines has been prepared and shown to be potent and selective inhibitors of the human inducible nitric oxide synthase (hiNOS) isoform versus the human endothelial nitric oxide synthase (heNOS) and the human neuronal nitric oxide synthase (hnNOS). Simple substitutions at the 3-, 4-, or 5-position afforded more potent analogues than the parent 2-iminopyrrolidine 1. The effect of ring substitutions on both potency and selectivity for the different NOS isoforms is described. Substitution at the 4- and 5-positions of the 2-iminopyrrolidine yielded both potent and selective inhibitors of hiNOS. In particular, (+)-cis-4-methyl-5-pentylpyrrolidin-2-imine, monohydrochloride (20), displayed potent inhibition of hiNOS (IC50 = 0.25 mu M) and selectivities of 897 (heNOS IC50/hiNOS IC50) and 13 (hnNOS IC50/hiNOS IC50) Example 20 was shown to be an efficacious inhibitor of NO production in the mouse endotoxin assay. Furthermore, 20 displayed in vivo selectivity, versus heNOS isoform, by not elevating blood pressure at multiples of the effective dose in the mouse.
Multifaceted catalysis approach to nitrile activation: direct synthesis of halogenated allyl amides from allylic alcohols
作者:Roy P. Lester、Jay J. Dunsford、Jason E. Camp
DOI:10.1039/c3ob41692e
日期:——
Allyl amides were synthesised from the reaction of allylalcohols and halogenated nitriles using a platinum multifaceted catalysis approach in which both the nucleophilic addition and subsequent [3,3]-sigmatropic rearrangement steps of the process were catalysed by the same complex. Additionally, 1H/13C1H} NMR and GC studies provided the first insights into the mechanism of this transformation.
使用铂多面催化方法从烯丙醇与卤化腈的反应中合成烯丙基酰胺,其中该过程的亲核加成和随后的[3,3]-σ重排步骤均由相同的配合物催化。此外,1 H / 13 C 1 H} NMR和GC研究提供了对该转化机理的初步见解。