Synthesis of a stereoisomer of wortmannilactone C—failure and success
摘要:
A diastereomer of wortmannilactone C was synthesized according to a versatile strategy from tert-butyl 3-hydroxypropanoate and ethyl (R)-3-hydroxybutanoate, by using versatile organometallic reagents to control four stereogenic centers out of five. The successful strategy consists of the construction of the C13-C17 triene by using a Liebeskind coupling and the construction of the C2-C7 triene by utilizing a Horner-Wadsworth-Emmons reaction to form the macrocycle. (C) 2015 Elsevier Ltd. All rights reserved.
The first total synthesis of the potent RNA-polymerase inhibitor etnangien is described, which establishes unequivocally the relative and absolute configuration of this sensitive macrolide antibiotic. Key features of the expedient and modular synthesis include stereoselective substrate-controlled boron- and tin-mediated aldol couplings to set the characteristic sequences of methyl and hydroxyl bearing
A highlystereoselective joint total synthesis of the potent polyketide macrolide antibiotics etnangien and etnangien methyl ester was accomplished by a convergent strategy and proceeds in 23 steps (longest linear sequence). Notable synthetic features include a sequence of highlystereoselective substrate-controlled aldolreactions to set the characteristic assembly of methyl- and hydroxyl-bearing
Fructose-1,6-bisphosphatase Inhibitors. 1. Purine Phosphonic Acids as Novel AMP Mimics
作者:Qun Dang、Brian S. Brown、Yan Liu、Robert M. Rydzewski、Edward D. Robinson、Paul D. van Poelje、M. Rami Reddy、Mark D. Erion
DOI:10.1021/jm900078f
日期:2009.5.14
Inhibition of FBPase is considered a promising way to reduce hepatic gluconeogenesis and therefore could be a potential approach to treat type 2 diabetes. Herein we report the discovery of a series of purine phosphonic acids as AMP mimics targeting the AMPsite of FBPase, which was achieved using a structure-guided drug design approach. These non-nucleotide purine analogues inhibitFBPase in a similar
Callipeltosides A, B and C: Total Syntheses and Structural Confirmation
作者:James R. Frost、Colin M. Pearson、Thomas N. Snaddon、Richard A. Booth、Richard M. Turner、Johan Gold、David M. Shaw、Matthew J. Gaunt、Steven V. Ley
DOI:10.1002/chem.201501877
日期:2015.9.14
Since their isolation almost 20 years ago, the callipeltosides have been of long standing interest to the synthetic community owing to their unique structural features and inherent biological activity. Herein we present our full research effort that has led to the synthesis of these molecules. Key aspects of our final strategy include 1) synthesis of the C1–C9 pyran core (5) using an AuCl3‐catalysed
The invention relates to a novel class of aminobenzophenones derivatives, to pharmaceutical preparations comprising said compounds, to dosage units of such preparations, to methods of treating patients comprising administering said compounds, and to the use of said compounds in the manufacture of pharmaceutical preparations.