Gold-Catalyzed Carboalkoxylations of 2-Ethynylbenzyl Ethers to form 1- and 2-Indanones Chemoselectively: Effects of Ligands and Solvents
作者:Chiou-Dong Wang、Yi-Feng Hsieh、Rai-Shung Liu
DOI:10.1002/adsc.201300988
日期:2014.1.13
acidic [tris(pentafluorophenyl)phosphine]gold hexafluoroantimonate [P(C6F5)3AuSbF6] in nitromethane (MeNO2) preferably gives 1‐indanones whereas [(ortho‐biphenyl)di(tert‐butyl)phosphine]gold triflimide [P(tBu)2(o‐biphenyl)AuNTf2] in dichloroethane tends to form 2‐indanone derivatives. For 2‐indanone products, we isolated two indenyl methyl ethers for deuterium labeling analyses, providing evidence for
使用合适的催化剂和溶剂,可以从2-乙炔基苄基醚选择性合成1-和2-茚满酮化合物。硝基甲烷(MeNO 2)中的高酸性[三(五氟苯基)膦]六氟锑酸金[P(C 6 F 5)3 AuSbF 6 ]优选产生1-茚满酮,而[(邻-联苯基)二(叔丁基)膦]三氟化金[P(t Bu)2(o-联苯)AuNTf 2]在二氯乙烷中往往会形成2-茚满酮衍生物。对于2-茚满酮产品,我们分离了两个茚基甲基醚进行氘标记分析,为π-炔烃活化提供了证据。