Palladium-Catalyzed C–H/C–H Cross-Coupling by Mechanochemistry: Direct Alkenylation and Heteroarylation of N1-Protected 1<i>H</i>-Indazoles
作者:Jingbo Yu、Xinjie Yang、Chongyang Wu、Weike Su
DOI:10.1021/acs.joc.9b02951
日期:2020.1.17
C3-(hetero)arylated 1H-indazoles are privileged structural motifs in numerous pharmaceuticals. Direct C3-alkenylation and C3-(hetero)arylation of 1H-indazoles have been significantly challenging because of the inert nature of this carbon center. Herein, we present an efficient mechanochemical strategy for palladium-catalyzed C-H/C-H cross-coupling to construct C3-alkenylated and C3-heteroarylated 1H-indazoles using
Regioselective zincation of indazoles using TMP2Zn and Negishi cross-coupling with aryl and heteroaryl iodides
作者:Andreas Unsinn、Paul Knochel
DOI:10.1039/c2cc17804d
日期:——
The metalation of various SEM-protected functionalized indazoles with TMP2Zn provides 3-zincated indazoles which undergo palladium-catalyzed Negishi cross-couplings in good yields.
用 TMP2Zn 对各种 SEM 保护的官能化吲唑进行金属化,可得到 3-锌化吲唑,这些吲唑在钯催化下发生内吉西交叉耦合反应,产量很高。