Hit-to-Lead Studies for the Antimalarial Tetrahydroisoquinolone Carboxanilides
摘要:
Phenotypic whole-cell screening in erythrocytic cocultures of Plasmodium falciparum identified a series of dihydroisoquinolones that possessed potent antimalarial activity against multiple resistant strains of P. falciparum in vitro and show no cytotoxicity to mammalian cells. Systematic structure activity studies revealed relationships between potency and modifications at N-2, C-3, and C-4. Careful structure property relationship studies, coupled with studies of metabolism, addressed the poor aqueous solubility and metabolic vulnerability, as well as potential toxicological effects, inherent in the more potent primary screening hits such as 10b. Analogues 13h and 13i, with structural modifications at each site, were shown to possess excellent antimalarial activity in vivo. The (+)-(35,4S) enantiomer of 13i and similar analogues were identified as the more potent. On the basis of these studies, we have selected (+)-13i for further study as a preclinical candidate.
DOI:
10.1021/acs.jmedchem.6b00752
作为产物:
描述:
Isobutylidene-4-aminomethylpyridine 、 potassium tert-butylate 在
甲苯 、 水 作用下,
以
甲苯 为溶剂,
反应 2.0h,
以to obtain 85 g (0.525 mol) of 4-pyridylmethylidene-isobutylamine as a slightly yellowish liquid的产率得到Isobutyl-[1-pyridin-4-yl-meth-(Z)-ylidene]-amine
参考文献:
名称:
Process for producing hydrazone derivatives of pyridinaldehydes
A new improved process for producing pyridinaldehydes and hydrazone derivatives thereof, for example, pyridinaldehyde-phenylhydrazones, is described. This comprises reacting an aminomethylpyridine with an aldehyde or a ketone to give a compound of the formula ##STR1## isomerizing the compound (III), in the presence of suitable catalysts, to a compound of the formula ##STR2## and converting the compound (V), in the presence of an acid and optionally in the presence of a hydrazine, into a pyridinaldehyde or a pyridinaldehyde-hydrazone. It is possible to produce by the process according to the invention pyridinaldehydes and pyridinaldehyde-hydrazones in a simple manner, under mild ecologically favorable conditions and in good to very good yields.