Anomeric oxygen to carbon rearrangements of alkynyl tributylstannane derivatives of furanyl (γ)- and pyranyl (δ)-lactols
作者:Marianne F. Buffet、Darren J. Dixon、Steven V. Ley、Dominic J. Reynolds、R. Ian Storer
DOI:10.1039/b316858a
日期:——
Tetrahydropyran and tetrahydrofuran containing natural products, drugs and agrochemicals often possess carbonâcarbon bonds adjacent to the heteroatom. Consequently, new methods for the construction of anomeric carbonâcarbon bonds are of considerable importance. We have devised a new strategy to access these systems that requires the treatment of O-glycoside alkynyl tributylstannane derivatives of furanyl and pyranyl lactols with Lewis acid to effect oxygen to carbon rearrangements. This leads to the formation of the corresponding carbon linked alkynol products that can be further manipulated to produce key structural motifs and building blocks for the assembly of complex molecules.
A Short and Efficient Stereoselective Synthesis of the Potent 5-Lipoxygenase Inhibitor CMI-977
作者:Darren J. Dixon、Steven V. Ley、Dominic J. Reynolds、Mukund S. Chorghade
DOI:10.1080/00397910008087245
日期:2000.6
Abstract A short and efficient synthesis of the potent 5-lipoxygenase inhibitor CMI-977 is described using as the key step a stereoselective anomeric oxygen to carbon rearrangement of an alkynyl stannane tetrahydrofuranyl ether derivative mediated by boron trifluoride etherate.
A novel and simple asymmetric synthesis of CMI-977 (LDP-977): a potent anti-asthmatic drug lead
作者:Mukund K Gurjar、A.M.S Murugaiah、P Radhakrishna、C.V Ramana、Mukund S Chorghade
DOI:10.1016/s0957-4166(03)00157-5
日期:2003.5
A practical gram scale asymmetric synthesis of CMI-977 is described. A tandem doubleelimination of an α-chlorooxirane and concomitant intramolecular nucleophilic substitution was used as the key step. Jacobsen hydrolytic kinetic resolution and Sharpless asymmetric epoxidation protocols were applied for the execution of the synthesis of the key chiral buildingblock.
[EN] COMPOUNDS AND METHODS FOR THE TREATMENT OF CARDIOVASCULAR, INFLAMMATORY AND IMMUNE DISORDERS<br/>[FR] COMPOSES ET PROCEDES POUR LE TRAITEMENT DES TROUBLES CARDIO-VASCULAIRES, INFLAMMATOIRES ET IMMUNITAIRES
申请人:CYTOMED, INC.
公开号:WO1996000212A1
公开(公告)日:1996-01-04
(EN) Tetrahydrofurans, tetrahydrothiophenes, pyrrolidines and cyclopentanes are disclosed that reduce the chemotaxis and respiratory burst leading to the formation of damaging oxygen radicals of polymorphonuclear leukocytes during an inflammatory or immune response. The compounds exhibit this biological activity by acting as PAF receptor antagonists, by inhibiting the enzyme 5-lipoxygenase, or by exhibiting dual activity, i.e., by acting as both a PAF receptor antagonist and inhibitor of 5-lipoxygenase. It has been determined that 5-lipoxygenase activity, oral availability, and stability $i(in vivo) (for example, glucuronidation rate) can vary significantly among the optical isomers of the disclosed compounds.(FR) L'invention concerne des tétrahydrofurannes, des tétrahydrothiophènes, des pyrrolidines et des cyclopentanes qui réduisent le chimiotactisme et l'activation métabolique respiratoire entraînant la formation de radicaux oxygène dommageables de leucocytes polymorphonucléaires lors d'une réaction inflammatoire ou immunitaire. Ces composés présentent cette activité biologique en agissant comme antagonistes du récepteur du facteur d'activation des plaquettes, en inhibant la 5-lipoxygénase, ou bien en présentant une activité double, c'est-à-dire en agissant à la fois comme antagonistes du récepteur du facteur d'activation des plaquettes et comme inhibiteur de la 5-lipoxygénase. Il a été déterminé que l'activité 5-lipoxygénase, la disponibilité orale, et la stabilité $i(in vivo)(par exemple le taux de glucuronidation) peuvent varier substantiellement parmi les isomères optiques descomposés décrits.