作者:Tsuyoshi Mita、Sho Ishii、Yuki Higuchi、Yoshihiro Sato
DOI:10.1021/acs.orglett.8b03337
日期:2018.12.7
By using a new catalytic system (PdCl2[P(n-Bu)(3)](2) in combination with ZnEt2), various 3-indolylmethanol derivatives were successfully carboxylated with CO2 (1 atm) via dearomatization of the indole nucleus, affording 3-methyleneindoline-2-carboxylates. In contrast, carboxylation of 2-indolylmethanol derivatives afforded unexpected doubly carboxylated products, which are useful synthetic precursors for biologically active compounds.