6-Magnesiated Purines: Preparation and Reaction with Aldehydes
作者:Tomáš Tobrman、Dalimil Dvořák
DOI:10.1021/ol0355027
日期:2003.11.1
[reaction: see text] Halogen-metalexchange reaction of 9-benzyl-6-iodopurine with iPrMgCl in toluene at -80 degrees C proceeds almost quantitatively. Such a purine-derived Grignardreagent reacts selectively with aldehydes in toluene, giving the corresponding alcohols in 25-62% yield, while other functional groups such as ketones, esters, and nitriles do not react under these conditions. The reaction
An Improved Route to Purin-6-yl Magnesium Halides by Metal–Halogen Exchange in Dichloromethane
作者:Stephen Lindell、Malcolm Gordon、Daniel Richards
DOI:10.1055/s-0036-1591727
日期:2018.3
Treatment of a solution of 9-benzyl or 9-phenyl 6-iodopurine in dichloromethane with an ethereal solution of ethylmagnesium bromide at ambient temperature generates the corresponding purin-6-yl magnesium halides which react with aldehydes to give carbinols in 55–80% yield. Performing the same procedure with THF as solvent gave carbinols in much lower yields (≤15%).
Regioselective C<sup>6</sup>–H Hydroxyalkylation of Purines and Purine Nucleosides via α-C–H Functionalization of Alcohols at Room Temperature
作者:Mingwu Yu、Zheng Zhou、Yiwen Chen、Zhichuan Wang、Weili Wang、Kai Sun
DOI:10.1021/acs.orglett.2c01680
日期:2022.7.15
The highly regioselective C6–H hydroxylalkylation of purines and purine nucleosides within 10 min via the α-C(sp3)–H functionalization of alcohols at room temperature is reported here for the first time. The reaction tolerated various functional groups, which have the potential for further modification to afford other valuable molecules. The reported method avoids metal catalysts, light, and protecting
Microwave promoted reaction of purin-6-yl magnesium halides with aldehydes in dichloromethane at 100 °C
作者:Malcolm R. Gordon、Stephen D. Lindell
DOI:10.1016/j.tetlet.2018.04.014
日期:2018.5
a dichloromethane solution of 9-benzyl or 9-phenyl 6-iodopurine with ethereal ethylmagnesium bromide at ambient temperature gives the corresponding purin-6-yl magnesium halides. Addition of an aldehyde followed by heating at 100 °C in a microwave reactor yielded the corresponding carbinols in 52–81% yield.