Selenium-Catalyzed Regioselective Cyclization of Unsaturated Carboxylic Acids Using Hypervalent Iodine Oxidants
作者:Fateh V. Singh、Thomas Wirth
DOI:10.1021/ol202800k
日期:2011.12.16
A new and convenient selenium-catalyzed regioselective cyclization of γ,δ-unsaturated carboxylic acids to the corresponding 3,6-dihydro-2H-pyran-2-ones is described. The cyclization products have been obtained in good to excellent yields using diphenyl diselenide as a catalyst and [bis(trifluoroacetoxy)iodo]benzene as a stoichiometric oxidant.
描述了一种新的和便捷的硒催化的γ,δ-不饱和羧酸向相应的3,6-二氢-2 H-吡喃-2-酮的区域选择性环化。使用二苯二硒化物作为催化剂和[双(三氟乙酰氧基)碘]苯作为化学计量的氧化剂,已经以良好或优异的收率获得了环化产物。