Copper-Catalyzed Direct Oxidative α-Arylation of Pyrrolidine with Phenols and Naphtols
作者:Phideline Gerard、Gwilherm Evano
DOI:10.2174/1570178614666171120164418
日期:2018.4.12
An efficient procedure for the direct arylation of pyrrolidine with phenols and naphtols is
reported. Upon reaction with catalytic amounts of a binuclear copper(II)-7-azaindole complex under an
atmosphere of oxygen, pyrrolidine is smoothly oxidized to the corresponding imine which can be
trapped in situ by a series of phenols and naphtols in fair to good yields. This copper-catalyzed direct
oxidative arylation of pyrrolidine offers an efficient entry to α-aryl-pyrrolidines in a single step and
without the need for protecting or directing groups.
An Efficient One-Step Synthesis of Piperidin-2-yl and Pyrrolidin-2-yl Flavonoid Alkaloids through Phenolic Mannich Reactions
作者:Thanh Binh Nguyen、Qian Wang、Françoise Guéritte
DOI:10.1002/ejoc.201101312
日期:2011.12
An efficient one-stepsynthesis of piperidin-2-yl and pyrrolidin-2-yl flavonoid alkaloids was achieved in good to excellent yields by a highly regioselective phenolic Mannich reaction of chrysin with cyclic imines or iminium salts. Performing the reaction in a mixture of H2O/THF in the absence of an external reagent afforded the C-6 alkylated product exclusively. The same reaction in water in the presence