Intermolecular Aminocarbonylation of Alkenes using Concerted Cycloadditions of Iminoisocyanates
作者:Amanda Bongers、Christian Clavette、Wei Gan、Serge I. Gorelsky、Lyanne Betit、Kaitlyn Lavergne、Thomas Markiewicz、Patrick J. Moon、Nicolas Das Neves、Nimrat K. Obhi、Amy B. Toderian、André M. Beauchemin
DOI:10.1021/acs.joc.6b02713
日期:2017.1.20
that the LUMO of the iminoisocyanate is reacting with the HOMO of the alkene. Computational and experimental results support a concerted asynchronous [3 + 2] cycloaddition involving an iminoisocyanate, which was observed for the first time by FTIR under the reaction conditions. The products of this reaction are complex azomethineimines, which are precursors to valuable β-amino carbonyl compounds such
A Novel Preparation of 2-Aminocyclopentanecarboxamides
作者:Péter Csomós、Gábor Bernáth、Ferenc Fülöp
DOI:10.1007/s007060200077
日期:2002.8.1
Different syntheses of cis - and trans -2-aminocyclopentanecarboxamides were studied. A convenient and effective method was devised for the preparation of cis -2-aminocyclopentanecarboxamide derivatives starting from the readily available 6- tert -butoxycarbonyl-6-azabicyclo[3.2.0]heptan-7-one.
Provided is a compound which is useful as a therapeutic agent for chronic renal insufficiency and a therapeutic agent for diabetic nephropathy.
The present inventors have made extensive studies on an ornithine derivative having an antagonistic action against an EP4 receptor, and as a result, they have found that by introducing cycloalkanediyl at a C terminal of the ornithine part of the compound of the present invention, the physicochemical properties such as solubility, and the like can be improved, thereby giving further preferred properties as a pharmaceutical. Therefore, they have completed the present invention.
The compound of the present invention exhibits a good antagonistic action against an EP4 receptor, and thus, it is useful as a therapeutic agent for chronic renal insufficiency and diabetic nephropathy.
The structure-activity profile of mercaptobenzamides’ anti-HIV activity suggests that thermodynamics of metabolism is more important than binding affinity to the target
作者:Herman Nikolayevskiy、Marco Robello、Michael T. Scerba、Evan H. Pasternak、Mrinmoy Saha、Tracy L. Hartman、Caitlin A. Buchholz、Robert W. Buckheit、Stewart R. Durell、Daniel H. Appella
DOI:10.1016/j.ejmech.2019.06.020
日期:2019.9
Mercaptobenzamide thioesters and thioethers are chemically simple HIV-1 maturation inhibitors with a unique mechanism of action, low toxicity, and a high barrier to viral resistance. A structure-activity relationship (SAR) profile based on 39 mercaptobenzamide prodrug analogs exposed divergent activity/toxicity roles for the internal and terminal amides. To probe the relationship between antiviral activity and toxicity, we generated an improved computational model for the binding of mercaptobenzamide thioesters (SAMTs) to the HIV-1 NCp7 C-terminal zinc finger, revealing the presence of a second low-energy binding orientation, hitherto undisclosed. Finally, using NMR-derived thiol -thioester exchange equilibrium constants, we propose that thermodynamics plays a role in determining the antiviral activity observed in the SAR profile. (C) 2019 Published by Elsevier Masson SAS.
An effective approach to the enantiomers of alicyclic β-aminonitriles by using lipase catalysis
作者:Mónika Fitz、Katri Lundell、Maria Lindroos、Ferenc Fülöp、Liisa T. Kanerva
DOI:10.1016/j.tetasy.2005.10.017
日期:2005.11
Lipase-catalyzed N-acylations of racemic cis- and trans-2-aminocyclopentane- (and cyclohexane-) carbonitriles with 2,2,2-trifluoethyl butanoate in tert-butyl methyl ether (TBME) and in room-temperature ionic liquids (RTILs) were studied. The racemates were effectively resolved (E > 200) on a preparative scale by lipase PS-C II (lipase from Burkholderia cepacia) in TBME, resulting in two enantiomers in their enantiopure forms at 50% conversion. The reactions in RTILs with Novozym 435 (Candida antarctica lipase B) were slow and proceeded with low enantio selectivity. (c) 2005 Elsevier Ltd. All rights reserved.