The trifluoromethylation of enamines of ethyl 3-oxocarboxylates catalyzed by Fenton reagent with CF3I was investigated. Trifluoromethylation followed by acid hydrolysis provided 3-oxo-2-(trifluoromethyl)carboxylates in 64–94% yields, which were greater than those obtained by the trifluoromethylation of 3-oxocarboxylates as reported previously. Enamines trifluoromethylated at the 2-position were isolated
Compounds of formula (I):
wherein variable groups are defined within; their use in the inhibition of 11βHSD1, processes for making them and pharmaceutical compositions comprising them are described.
From Triazoles to Imidazolines through the Sequential N–H Insertion of α-Imino Rhodium–Carbenes into β-Enamino Esters/Enamine–Imine Tautomerization/Conjugate Addition Cascade
作者:Hyun Ji Jeon、Da Jung Jung、Ju Hyun Kim、Youngmee Kim、Jean Bouffard、Sang-gi Lee
DOI:10.1021/jo501785d
日期:2014.10.17
A rhodium(II)-catalyzed denitrogenative coupling of N-sulfonyl-1,2,3-triazoles with ambiphilic beta-enamino esters affords 2,5-dihydro-H-1-imidazoles (3-imidazolines) with broad functional group tolerance. Mechanistic studies using a deuterium-labeled triazole suggest that the reaction proceeds in a cascade through the N-H insertion of an alpha-imino rhodium-carbene, followed by enamine-imine tautomerization and conjugate addition. Moreover, the reaction proceeds with high diastereoselectivity for alpha-substituted beta-enamino esters (R-3 = Me, Ph) to give a single diastereomer.
Discovery of a Potent, Selective, and Orally Bioavailable Acidic 11β-Hydroxysteroid Dehydrogenase Type 1 (11β-HSD1) Inhibitor: Discovery of 2-[(3<i>S</i>)-1-[5-(Cyclohexylcarbamoyl)-6-propylsulfanylpyridin-2-yl]-3-piperidyl]acetic Acid (AZD4017)
作者:James S. Scott、Suzanne S. Bowker、Joanne deSchoolmeester、Stefan Gerhardt、David Hargreaves、Elaine Kilgour、Adele Lloyd、Rachel M. Mayers、William McCoull、Nicholas J. Newcombe、Derek Ogg、Martin J. Packer、Amanda Rees、John Revill、Paul Schofield、Nidhal Selmi、John G. Swales、Paul R. O. Whittamore
DOI:10.1021/jm300592r
日期:2012.6.28
Inhibition of 11 beta-HSD1 is an attractive mechanism for the treatment of obesity and other elements of the metabolic syndrome. We report here the discovery of a nicotinic amide derived carboxylic acid class of inhibitors that has good potency, selectivity, and pharmacokinetic characteristics. Compound 11i (AZD4017) is an effective inhibitor of 11 beta-HSD1 in human adipocytes and exhibits good druglike properties and as a consequence was selected for clinical development.