Catalytic Asymmetric Allenylation of Malonates with the Generation of Central Chirality
作者:Qiankun Li、Chunling Fu、Shengming Ma
DOI:10.1002/anie.201204346
日期:2012.11.19
Water plays an important role in a palladium‐catalyzed allenylation of diethyl malonate with 2,3‐allenyl acetates to yield centrally chiral allenyl malonates bearing synthetically useful functional groups (see scheme). The products were formed with 92–96 % ee in the presence of a bulky, electron‐rich biphenyl ligand at room temperature.
水在钯催化的丙二酸二乙酯与2,3-烯丙基乙酸酯的烯丙基化反应中起重要作用,以产生带有合成有用官能团的中心手性烯丙二酸酯(参见方案)。在室温下,在存在大量电子富集的联苯配体的情况下,形成的产品具有92%至96% ee。