Antti Pohjakallio and Petri M . Pihko . 2008 . A versatile entry to 3 - unsubstituted
نویسندگان
چکیده
منابع مشابه
Synthesis and Reactions of 3-Unsubstituted 2-Isoxazolines
Pohjakallio_176x250.indd 3 4.3.2011 10.34 Abstract_Pohjakallio_176x250.indd 3 4.3.2011 10.34Pohjakallio_176x250.indd 3 4.3.2011 10.34 2-Isoksatsoliinit ovat heterosyklisiä yhdisteitä, joita voidaan käyttää monipuolisesti synteettisinä välivaiheina erilaisten hyödyllisten rakenneyksiköiden valmistamisessa. 2-Isoksatsoliinien hyödyllisyys on pitkään perustunut niiden helppoon synteesiin erityises...
متن کامل2,3-unsubstituted chromones and their enaminone precursors as versatile reagents for the synthesis of fused pyridines.
A divergent and regioselective approach to fused pyridines was developed through formal [3 + 3] cyclocondensations from simple 2,3-unsubstituted chromones or their enaminone precursors.
متن کاملDihydrooxazine oxides as key intermediates in organocatalytic Michael additions of aldehydes to nitroalkenes.
Pause and play: dihydrooxazine oxides are stable intermediates that are protonated directly, without the intermediacy of the zwitterions, in organocatalytic Michael additions of aldehydes and nitroalkenes (see scheme, R=alkyl). Protonation of these species explains both the role of the acid co-catalyst in these reactions, and the observed stereochemistry when the reaction is conducted with α-al...
متن کاملSolvent free oxidation of primary alcohols and diols using thymine iron(III) catalyst.
In this study, we developed an efficient and selective iron-based catalyst system for the synthesis of ketones from secondary alcohols and carboxylic acids from primary alcohol. In situ generated iron catalyst of thymine-1-acetate (THA) and FeCl(3) under solvent-free condition exhibits high activity. As an example, 1-octanol and 2-octanol were oxidized to 1-octanoic acid and 2-octanone with 89%...
متن کاملFinding Semantic Errors in the Rule-base of Production Systems, and Reasoning with Insufficient Input Data Petri-net-based Approach
Two simple but practical production systems are modeled using Petri Nets. Petri-net models are very useful in finding semantic errors like generalization error and missing conditions. In addition, reasoning with insufficient input information is formulated to yield meaningful results. In both rule-base verification and reasoning with insufficient data, heuristic methods like backward-chained re...
متن کامل