Dual Rh(
<scp>II</scp>
)/Pd(0) Relay Catalysis for
<scp>One‐Pot</scp>
Synthesis of
<scp>α‐Quaternary</scp>
Allylated Indolin‐2‐ones and Benzofuran‐2‐ones
作者:Yu Lim Lee、Kyu Ree Lee、Zi Xuan、Sang‐gi Lee
DOI:10.1002/bkcs.12211
日期:2021.3
Cooperative Rh(II) and Pd(0) dual relay catalysis has been developed, which allowed one‐potsynthesis of α‐quaternary allylated indolin‐2‐ones and benzofuran‐2‐ones. The catalytic reaction proceeded through the sequential Rh(II)‐catalyzed intramolecular aromatic C(sp2)‐H bond functionalization of α‐diazo carbonyl compounds, followed by Pd(0)‐catalyzed allylic alkylation with allylic carbonates to afford
chemo‐selective Rh(II)/Pd(0) dual catalysis that promotes one‐pot synthesis of C3‐quaternary allylic oxindoles from N‐aryl‐α‐diazo‐β‐ketoamides and functionalized allyl carbonates in good to excellent yields has been developed. The efficiency of this transformation relies on the choice of Rh(II)/Pd(0) dual catalysis strategy that enabled cascade intramolecular aryl C−H insertion and allylic alkylation