Anionic Phospho-Fries Rearrangement at Ferrocene: One-Pot Approach to P,O-Substituted Ferrocenes
作者:Marcus Korb、Dieter Schaarschmidt、Heinrich Lang
DOI:10.1021/om5002827
日期:2014.4.28
For the first time the anionic phospho-Fries rearrangement has been successfully applied in ferrocene chemistry, giving access to 1,2-P,O-substituted ferrocenes. The 1,3 (O → C)-migration occurs at ferrocenyl phosphates, thiophosphates, phosphite–borane adducts, and phosphinates by treatment with a base such as lithium diisopropylamide at low temperature, whereas the highest yields were obtained starting
阴离子磷酸-弗里斯重排首次成功地应用于二茂铁化学中,从而获得了1,2-P,O-取代的二茂铁。1,3(O→C)迁移发生于二茂铁基磷酸酯,硫代磷酸酯,亚磷酸酯-硼烷加合物和次膦酸酯,是通过在低温下用碱(如二异丙基氨基化锂)处理来实现的,而从二乙基二茂铁基磷酸酯开始获得最高的收率。膦酸酯的伯膦和随后施特尔策P的完全还原,C交叉耦合允许Fe的合成(η 5 -C 5 H ^ 3 -2-OME-PPH 2)(η 5 -C 5 H ^ 5)(1) 。资质1在钯催化的Suzuki-Miyaura C,C偶合中作为支撑配体已通过在温和的反应条件下以良好或优异的收率合成空间拥挤的三邻位取代的联芳基来证明。