The firmware upgrade is the safe option for update our KARA Mega 3 but The most of Smartphone user want to install a fresh Firmware, So they have to choose second option Format all + Download Rom. When we are upgrading Mediatek devices (Micromax, Gionee, Spice etc.) by SP Tool then SP flash Tool ask for two option first firmware upgrade, second Format all + Download or Download only Rom. before going to backup and restore procedure First, we know that What is MTK NVRAM error and why does it come in our smartphones and MTK devices.Backup your current Firmware With MTK Droid Tool.Backup your Call Log – Contacts – Sms – Etc With G Backup.Read more about how to correctly acknowledge RSC content. Permission is not required) please go to the Copyright
If you want to reproduce the wholeĪrticle in a third-party commercial publication (excluding your thesis/dissertation for which If you are the author of this article, you do not need to request permission to reproduce figuresĪnd diagrams provided correct acknowledgement is given. Provided correct acknowledgement is given. If you are an author contributing to an RSC publication, you do not need to request permission Please go to the Copyright Clearance Center request page. To request permission to reproduce material from this article in a commercial publication, Provided that the correct acknowledgement is given and it is not used for commercial purposes. This article in other publications, without requesting further permission from the RSC, Herein we present the generality of this approach and some chemical transformations that can be achieved with our substrates.Īlkynyl Prins carbocyclization cascades for the synthesis of linear-fused heterocyclic ring systemsĬreative Commons Attribution-NonCommercial 3.0 Unported Licence. It is worth noting that this chemistry also facilitates the synthesis of piperidines and 1,4-oxazepanes, as well as the inclusion of indoles and benzofurans, which are privileged motifs for medicinal chemistry. The described method results in the preparation of synthetically versatile scaffolds with ample opportunity for further derivatization at the resulting tetrasubstituted olefin, or by inclusion of other functionalizable motifs from the starting materials. The diastereoselectivity of the cascade is studied using secondary alcohols/sulfonamides with different carbonyl partners. A formal cycloaddition is embedded in the cationic cascade, which enables the synthesis of a wide range of fused heterotricycles. We report a Brønsted acid-catalyzed carbocyclization cascade, featuring condensation of an alcohol/sulfonamide with an aldehyde followed by an intramolecular three-component coupling involving an alkyne, an oxocarbenium/iminium ion, and an arene.
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