esters over aldehydes was improved by introducing an electron-withdrawing group
at the para-positions of benzylic alcohols.
Dehydrogenative lactonization of diols in aqueous media catalyzed by a watersoluble Ir complex 44 was developed by Fujita and Yamaguchi et al. (Scheme 51)
Scheme 49 Esterification and lactonization catalyzed by 54
Scheme 50 Esterification of primary alcohols catalyzed by 64
Scheme 51 Lactonization of diols in water catalyzed by Ir complex 44
Iridium-Catalyzed Dehydrogenative Reactions
33
at the para-positions of benzylic alcohols.
Dehydrogenative lactonization of diols in aqueous media catalyzed by a watersoluble Ir complex 44 was developed by Fujita and Yamaguchi et al. (Scheme 51)
Scheme 49 Esterification and lactonization catalyzed by 54
Scheme 50 Esterification of primary alcohols catalyzed by 64
Scheme 51 Lactonization of diols in water catalyzed by Ir complex 44
Iridium-Catalyzed Dehydrogenative Reactions
33