2,4,6-Triaminopyrimidine as a Novel Hinge Binder in a Series of PI3Kδ Selective Inhibitors
作者:Leena Patel、Jayaraman Chandrasekhar、Jerry Evarts、Aaron C. Haran、Carmen Ip、Joshua A. Kaplan、Musong Kim、David Koditek、Latesh Lad、Eve-Irene Lepist、Mary E. McGrath、Nikolai Novikov、Stephane Perreault、Kamal D. Puri、John R. Somoza、Bart H. Steiner、Kirk L. Stevens、Joseph Therrien、Jennifer Treiberg、Armando G. Villaseñor、Arthur Yeung、Gary Phillips
DOI:10.1021/acs.jmedchem.6b00213
日期:2016.4.14
describe the discovery and optimization of a series of propeller shaped PI3Kδ inhibitors comprising a novel triaminopyrimidine hinge binder. Combinations of electronic and structural strategies were employed to mitigate aldehyde oxidase mediated metabolism. This medicinal chemistry effort culminated in the identification of 52, a potent and highly selective inhibitor of PI3Kδ that demonstrates efficacy in
The gamma-aminobutyric acid (GABA) receptor bears important sites of action for insecticides. Alantrypinone is an insecticidal alkaloid that acts as a selective antagonist for housefly (vs rat) GABA receptors, and is considered to be a lead compound for the development of a safer insecticide. In an attempt to obtain compounds with greater activity, a series of racemic alantrypinone derivatives were systematically synthesized using hetero Diels-Alder reactions, and a total of34 compounds were examined for their ability to inhibit the specific binding of [H-3]4'-ethynyl-4-n-propylbicycloorthobenzoate, a high-affinity non-competitive antagonist, to housefly-head membranes. The assay results showed that (1) there is no significant difference between the potencies of natural (+)-alantrypinone and its synthetic racemate; (2) the amide NHs at the 2- and 18-positions are important for high activity; (3) there is a considerable drop in potency for compounds without an aromatic ring at the 16-position; and (4) a large substituent at the 3-position is detrimental to high activity. (c) 2008 Elsevier Ltd. All rights reserved.
Efficient synthesis of biologically important chiral 2-alkylamino benzoxazinones
作者:Debendra K. Mohapatra、Apurba Datta
DOI:10.1016/s0960-894x(97)10010-5
日期:1997.10
A novel general method has been developed for the synthesis of various amino acid derived chiral 2-substituted benzoxazinones, known inhibitors of standard serine proteases of the chymotrypsin superfamily. (C) 1997 Elsevier Science Ltd.
Three-Component One-Pot Total Syntheses of Glyantrypine, Fumiquinazoline F, and Fiscalin B Promoted by Microwave Irradiation
作者:Ji-Feng Liu、Ping Ye、Bailin Zhang、Grace Bi、Katie Sargent、Libing Yu、Daniel Yohannes、Carmen M. Baldino
DOI:10.1021/jo0508043
日期:2005.8.1
A microwave-promoted three-component one-pot reaction has been developed to provide access to the core pyrazino[2,1-b]quinazoline-3,6-dione (1) scaffold, which is common to several families of alkaloids with significant biological activities. By adapting this synthetic strategy through the use of selected Boc-amino acids and amino acid esters, we have accomplished highly efficient and concise total syntheses of glyantrypine (2), fumiquinazoline F (3), and fiscalin B (5), achieving overall yields of 55, 39, and 20%, respectively.