Double-Chelation-Assisted Rh-Catalyzed Intermolecular Hydroacylation between Salicylaldehydes and 1,4-Penta- or 1,5-Hexadienes
作者:Masanori Imai、Masakazu Tanaka、Keitaro Tanaka、Yoichiro Yamamoto、Naoko Imai-Ogata、Masato Shimowatari、Shinji Nagumo、Norio Kawahara、Hiroshi Suemune
DOI:10.1021/jo035395u
日期:2004.2.1
Intermolecular hydroacylation between salicylaldehydes 1, 26−40 and 1,4-penta- or 1,5-hexadienes 4−13 by Rh-catalyst proceeded under mild reaction conditions to give a mixture of iso- and normal-hydroacylated products 14−25, 41−55, and 57−60. In the hydroacylation reaction, chelation of both salicylaldehyde and diene to the Rh-complex plays a crucial role. The ratio of iso- and normal-hydroacylated
水杨醛之间的分子间加氢酰化1,26 - 40和1,4-五-或1,5-己二烯4 - 13由Rh的催化剂在温和的反应条件下进行,得到的混合物异-和正常-hydroacylated产品14 - 25,41 - 55,和57 - 60。在加氢酰化反应中,水杨醛和二烯与Rh络合物的螯合起关键作用。等值线与正常值之比可以通过添加水杨酸或胺来调节-氢酰化产物。在氘标记水杨醛实验的基础上,研究了各种Rh络合物,溶剂和添加剂的作用,并提出了催化循环的合理机理。