Syntheses and Neuraminidase Inhibitory Activity of Multisubstituted Cyclopentane Amide Derivatives
作者:Pooran Chand、Y. Sudhakar Babu、Shanta Bantia、Scott Rowland、Ali Dehghani、Pravin L. Kotian、Tracy L. Hutchison、Shoukath Ali、Wayne Brouillette、Yahya El-Kattan、Tsu-Hsing Lin
DOI:10.1021/jm0303406
日期:2004.4.1
position 3, were tested for their ability to inhibit A and B forms of influenza neuraminidase. The 1-ethylpropylamide, diethylamide, dipropylamide, and 4-morpholinylamide showed very good inhibitoryactivity (IC(50) = 0.015-0.080 microM) vs the neuraminidase A form, but modest activity (IC(50) = 3.0-9.2 microM) vs the neuraminidase B form. Since the parent amides bear two chiral centers (C-1 and C-1'), three
SN2' Additions of cuprates to sulfone and ester-polarized cyclopentenylic systems
作者:Y. Pan、D.K. Hutchinson、H.H. Nantz、P.L. Fuchs
DOI:10.1016/0040-4020(89)80074-2
日期:1989.1
The stereochemistry of SN2' addition of cuprates to sulfone and ester-polarized cyclopentenyl systems is shown to depend upon the nature of the leaving group. Allyl ammonium salts usually undergo stercospecific synfacial additionreactions.
Highly diastereoselective cycloaddition of nitrileoxides to the title compounds gives masked polyfunctional products amenable to a variety of synthetic elaboration; an entry to enantiomerically pure derivatives is described.
Studies Dealing with Thionium Ion Promoted Mannich Cyclization Reactions
作者:Albert Padwa、Alex G. Waterson
DOI:10.1021/jo991414h
日期:2000.1.1
six-membered alkylthio-substituted lactams as transient intermediates. Further reaction of the alkylthio-substituted lactam with DMTSF generates an N-acyliminium ion, which undergoes cyclization with the tethered aromatic ring to produce an azapolycyclic ring system. Related cyclization sequences occur when amido thioacetals possessing simple olefinic tethers were used. The overall procedure represents an efficient
Trithioorthoester Exchange and Metathesis: New Tools for Dynamic Covalent Chemistry
作者:Michael Bothe、A. Gastón Orrillo、Ricardo L. E. Furlan、Max von Delius
DOI:10.1055/s-0039-1690992
日期:2019.10
acid-catalyzed exchangereaction of trithioorthoesters with thiols. We found that trithioorthoester exchange occurs readily in various solvents in the presence of stoichiometric amounts of strong Bronsted acids or catalytic amounts of certain Lewis acids. The scope of the exchangereaction was explored with various substrates, and conditions were identified that permit clean metathesis reactions between two