作者:A. Stephen K. Hashmi、Jan P. Weyrauch、Elzen Kurpejović、Tanja M. Frost、Burkhard Miehlich、Wolfgang Frey、Jan W. Bats
DOI:10.1002/chem.200501268
日期:2006.7.24
acylated hydroxymethyl and ammonium groups, on the furan ring of substrates in gold-catalyzed phenol synthesis has been investigated. The furan ring was also replaced by different heterocycles, such as pyrroles, thiophenes, oxazoles, and a 2,4-dimethoxyphenyl group; gold catalysis then delivered no phenols, but occasionally other products were obtained. [Ru(3)(CO)(12)] also catalyzed the conversion
在金催化的苯酚合成中,已研究了不同的取代基(如溴,氯甲基,羟甲基,甲酰基,乙酰基,羧基和酰化的羟甲基和铵基)对基质的呋喃环的影响。呋喃环也被不同的杂环所取代,例如吡咯,噻吩,恶唑和2,4-二甲氧基苯基。金催化然后没有提供酚,但是偶尔获得其他产物。[Ru(3)(CO)(12)]还以低速率催化了1的转化,[Os(3)(CO)(12)]未能作为催化剂,并带有[Co(2)(CO) (8)]可获得炔烃络合物19,其不产生任何酚,但与降冰片烯反应以产生Pauson-Khand反应的产物。制备1的亚乙烯基配合物的努力为这些物种提供了唯一的证据。在具有钌的膦配体存在下,观察到有趣的脱氧为22。苯酚2 c被转化为烯丙基醚(对-克莱森重排的基础),并转化为三氟甲磺酸芳基酯(用于交叉偶联反应的基础)。