The present invention is directed to [1,2,4]triazolo[4,3-b][1,2,4]triazines, and pharmaceutical compositions thereof, which are inhibitors of kinases such as c-Met and are useful in the treatment of cancer and other diseases related to the dysregulation of kinase pathways.
Enantioselective α-Functionalization of 1,3-Dithianes by Iridium-Catalyzed Allylic Substitution
作者:Panpan Wang、Qian Jiang、Ruibo Zhao、Xingang Xie、Shouchu Tang、Xiaolei Wang
DOI:10.1021/acs.joc.0c01683
日期:2020.10.2
iridium-catalyzed asymmetric allylicsubstitution reaction with 2-alkoxy carbonyl-1,3-dithianes has been achieved with high regio- and enantioselectivities. The transformation provides a new method for the enantioselective α-functionalization of dithianes. The corresponding dithiane-containing products are easily converted into many other derivatives with high yields and enantioselectivities.
Reactions of 2-acyl-1,3-dithianes with α,β-unsaturated ketones: Simple preparation of cyclohexendione monoacetals
作者:Philip C. Bulman Page、Shaun A. Harkin、Allan P. Marchington
DOI:10.1016/s0040-4039(01)93945-0
日期:1989.1
2-Acyl-1,3-dithianes undergo efficient Lewis acid-catalysed addition to α,β-unsaturated ketones giving δ-diketones which suffer intramolecular aldol reaction to produce cyclohex-2-en-1,4-dione monoacetals and/or cyclohex-3-en-1,2-dione monoacetals.
ENANTIOSELECTIVE SYNTHESIS OF α-HYDROXYTHIOACETALS BY THE BAKER’S YEAST REDUCTION OF α-KETOTHIOACETALS
作者:Tamotsu Fujisawa、Eiji Kojima、Toshiyuki Itoh、Toshio Sato
DOI:10.1246/cl.1985.1751
日期:1985.11.5
Asymmetric reduction of a-ketothioacetals was achieved by fermenting baker’s yeast to afford optically pure α-hydroxythioacetals which play as equivalents of valuable α-hydroxy aldehydes. The utility of the present method was demonstrated in the stereo-selective syntheses of (4S,5S)- and (4S,5R)-4,5-dihydroxydecanoic acid γ-lactones from (S)-(−)-1-(1,3-dithian-2-yl)-1,4-butanediol.
Studies towards the total synthesis of batzelladine A
作者:Mark C. Elliott、Matthew S. Long
DOI:10.1039/b404679j
日期:——
Application of a diastereoselective three-component coupling to the bicyclic core of the batzelladine alkaloids is described. The synthesis features the elaboration of glutamic acid by use of Eschenmoser sulfide contraction. An earlier approach is also included, which shows some limitations of dithiane chemistry when applied to the particular compounds required for this target.