Efficient construction of diverse 3-cyanoindoles under novel tandem catalysis
作者:Jun Wu、Jiabin Liu、Kerui Zhou、Zhenni He、Qian Wang、Fen Wu、Tingting Miao、Jinjie Qian、Qian Shi
DOI:10.1039/d0cc05439a
日期:——
unprotected, N-alkyl and N-aryl 3-cyanoindoles are obtained with good to excellent yields. The usefulness of this synthetic approach is further demonstrated by the successful synthesis of practical compounds such as the therapeutic estrogen receptor ligand A precursor. Mechanism study shows that the tandem catalysis exploits a Suzuki cross-coupling with subsequent base-induced isoxazole fragmentation, followed
Transition-Metal-Free Synthesis of 1,2-Disubstituted Indoles
作者:Gleb A. Chesnokov、Alexandra A. Ageshina、Maxim A. Topchiy、Mikhail S. Nechaev、Andrey F. Asachenko
DOI:10.1002/ejoc.201900772
日期:2019.8.15
A new robust transition‐metal‐free method for synthesis of 1,2‐disubstituted indoles from easily available tertiary amides is presented. This approach can be performed in a one‐pot two‐step manner directly from secondary amines. Mechanistic studies showed that acyl transfer might be an important step in the course of the reaction. Viability of the presented approach for benzofurans and benzothiophenes
LIGANDS FOR METALS AS CATALYSTS FOR CARBON-CARBON BOND FORMATION
申请人:LIANG Lan-Chang
公开号:US20090163740A1
公开(公告)日:2009-06-25
The present invention provides a family of novel and stable ligands which chelate with a metal to form a complex. The ligand contains a t-butyl group or a ring, particularly a substituted aromatic group, linked to a nitrogen atom. The nitrogen atom further links to PR
1
R
2
, PR
1
R
2
R
9
, P(═O)R
1
R
2
, NR
1
R
2
, OR
1
, SR
1
, or AsR
1
R
2
group with a saturated or unsaturated hydrocarbon such that the structure of the ligand can be stabilized.