Dehydrogenative Lactonization of Diols in Aqueous Media Catalyzed by a Water-Soluble Iridium Complex Bearing a Functional Bipyridine Ligand
作者:Ken-ichi Fujita、Wataru Ito、Ryohei Yamaguchi
DOI:10.1002/cctc.201300717
日期:2014.1
A new catalytic system for the dehydrogenative lactonization of a variety of benzylic and aliphatic diols in aqueous media was developed. By using a water‐soluble, dicationic iridium catalyst bearing 6,6′‐dihydroxy‐2,2′‐bipyridine as a functional ligand, highly atom economical and environmentally benign synthesis of various lactones was achieved in good to excellent yields. Recovery and reuse of the
开发了一种新的催化体系,用于在水性介质中对各种苄基和脂肪族二醇进行脱氢内酯化。通过使用带有6,6'-二羟基-2,2'-联吡啶作为功能性配体的水溶性阳离子铱催化剂,可以实现高原子经济且对环境无害的各种内酯合成,收率良好至极佳。催化剂的回收和再利用也可以通过简单的相分离来完成,并且回收的催化剂至少在第五次运行之前一直保持其高活性。