Stereocontrolled total synthesis of (+)-concanamycin F: the strategic use of boron-mediated aldol reactions of chiral ketones
作者:Ian Paterson、Victoria A. Steadman neé Doughty、Malcolm D. McLeod、Thomas Trieselmann
DOI:10.1016/j.tet.2011.09.012
日期:2011.12
cross-coupling reaction between the C1–C13 vinyl iodide and C14–C22 vinyl stannane fragments to assemble the (12E,14E)-diene, a modified Yamaguchi macrolactonisation delivered the requisite 18-membered macrocyclic core. This advanced intermediate was also obtained by an alternative sequence using an esterification step to connect the C1–C13 and C14–C22 fragments followed by a Pd-catalysed intramolecular
Design, Synthesis and Biological Evaluation of Highly Potent Simplified Archazolids
作者:Solenne Rivière、Christin Vielmuth、Christiane Ennenbach、Aliaa Abdelrahman、Carina Lemke、Michael Gütschow、Christa E. Müller、Dirk Menche
DOI:10.1002/cmdc.202000154
日期:2020.7.20
agents. Their complex macrolide structures and scarce natural supply make the development of more readily available analogues highly important. Herein, we report the design, synthesis and biological evaluation of four simplified and partially saturated archazolid derivatives. We also reveal important structure‐activity relationship data as well as insights into the pharmacophore of these complex polyketides
Biocatalytic production of alpha-hydroxy ketones and vicinal diols by yeast and human aldo–keto reductases
作者:Eduard Calam、Sergio Porté、M. Rosario Fernández、Jaume Farrés、Xavier Parés、Josep A. Biosca
DOI:10.1016/j.cbi.2012.12.006
日期:2013.2
reductases in the production of α-hydroxy ketones and diolsfromvicinal diketones. The reactions have been carried out with pure enzymes and with an NADPH-regenerating system consisting of glucose-6-phosphate and glucose-6-phosphate dehydrogenase. To ascertain the regio and stereoselectivity of the reduction reactions catalyzed by the AKRs, we have separated and characterized the reaction products by means
Biosynthesis of tetronasin: Part 7. Preparation of structural analogues of the tetraketide biosynthetic precursor to tetronasin
作者:Simon L. Less、Peter F. Leadlay、Christopher J. Dutton、James Staunton
DOI:10.1016/0040-4039(96)00601-6
日期:1996.5
The preparation of three structuralanalogues of the putative tetraketide biosyntheticprecursor (2) of the acyl tetronic acid ionophore tetronasin, as N-acetylcysteamine thioesters (3), (4) and (5) is described. Two examples are 19F-labelled.
The anodicoxidation of α-keto and α-hydroxythloacetals provides an efficient way for the regeneration of α-diones and α-ketols, specially in the cases where chemical reactions are unsuccessful.