[EN] SYNTHETIC RETINOIDS FOR CONTROL OF CELL DIFFERENTIATION<br/>[FR] RÉTINOÏDES SYNTHÉTIQUES POUR LE CONTRÔLE DE LA DIFFÉRENCIATION DES CELLULES
申请人:UNIV DURHAM
公开号:WO2012076842A1
公开(公告)日:2012-06-14
The present invention relates to synthetic retinoid compounds of formula (I) and their use in the control of cell differentiation or apoptosis.
本发明涉及式(I)的合成视黄酸化合物及其在控制细胞分化或凋亡方面的应用。
Mechanistic Studies on the Heck−Mizoroki Cross-Coupling Reaction of a Hindered Vinylboronate Ester as a Key Approach to Developing a Highly Stereoselective Synthesis of a C1−C7 <i>Z</i>,<i>Z</i>,<i>E</i>-Triene Synthon for Viridenomycin
作者:Andrei S. Batsanov、Jonathan P. Knowles、Andrew Whiting
DOI:10.1021/jo0626010
日期:2007.3.1
Mechanistic studies of the Heck−Mizoroki reaction of a vinylboronate ester with electronically different (four-substituted) aryl iodides shows that electron donors accelerate the cross-coupling, demonstrating that the oxidative addition step is not rate determining and that there is development of some degree of positive charge in the rate determining step. These results were used as a basis to allow
A Stereoselective Palladium-Mediated Reductive Coupling of Electron-Deficient Terminal Iodoalkenes
作者:Andrei S. Batsanov、Jonathan P. Knowles、Benedict Samsam、Andrew Whiting
DOI:10.1002/adsc.200700464
日期:2008.1.25
Iodoacrylate esters undergo palladium-catalysed reductive homocoupling to derive dienyl diester derivatives. This reductivecoupling can be extended to ester-substituted terminal iododienes to derive tetraene diesters. In all cases, the reactions show relatively high levels of stereocontrol, which shows an inversion of stereochemistry about one iodoalkene unit. This process, and the suggestion that the
A low temperature, vinylboronate ester-mediated, iterative cross-coupling approach to xanthomonadin polyenyl pigment analogues
作者:Katrina S. Madden、Jonathan P. Knowles、Andrew Whiting
DOI:10.1016/j.tet.2019.130657
日期:2019.11
Approaches to the polyene natural product xanthomonadin, an octaenyl electron-deficient bacterial photoprotective agent, and its debromo analogue, were developed. These involved the iterative cross-coupling of multiple C2-fragments, using a vinylboronate ester as a formal vinyl dianion equivalent. Vinyl iodide starting materials undergo Heck-Mizoroki cross-coupling at ambient temperatures, allowing further iododeboronation to derive the next vinyl iodide. This works in a highly effective manner to access systems of up to pentaene chain length. However, final assembly of polyenylboronates with such polyenyl iodides through their Suzuki-Miyaura cross-coupling was less successful, even at lower temperatures, reflecting the extreme sensitivity of such octaenylxanthomonadin analogues. Despite this, the mild cross-coupling conditions could be effectively applied to the assembly of a range of useful polyenyl building blocks, as well as a truncated pentaenyl-debromoxanthomonadin analogue. (C) 2019 Elsevier Ltd. All rights reserved.
Using Nature's polyenes as templates: studies of synthetic xanthomonadin analogues and realising their potential as antioxidants
作者:Katrina S. Madden、Hans R. E. Jokhoo、Fabian D. Conradi、Jonathan P. Knowles、Conrad W. Mullineaux、Andrew Whiting
DOI:10.1039/c9ob00275h
日期:——
Despite the instability of these types of compounds, both analogues proved to be sufficiently stable to allow isolation, spectroscopic analysis and biological studies of their photoprotective behaviour which showed that despite their shorter polyene chain length, they retained the ability to protect bacteria from photochemical damage; i.e. incorporation of one compound into E. coli provided photoprotective