Trifluoromethylallylation of Heterocyclic C–H Bonds with Allylic Carbonates under Rhodium Catalysis
作者:Miji Choi、Jihye Park、Satyasheel Sharma、Hyeim Jo、Sangil Han、Mijin Jeon、Neeraj Kumar Mishra、Sang Hoon Han、Jong Suk Lee、In Su Kim
DOI:10.1021/acs.joc.6b00721
日期:2016.6.3
The rhodium(III)-catalyzed γ-trifluoromethylallylation of various heterocyclic C–H bonds with CF3-substituted allylic carbonates is described. These reactions provide direct access to linear CF3-containing allyl frameworks with complete trans-selectivity via C–H bond activation followed by a formal SN-type reaction pathway.
Ruthenium(II)- or Rhodium(III)-Catalyzed Grignard-Type Addition of Indolines and Indoles to Activated Carbonyl Compounds
作者:Hyeim Jo、Jihye Park、Miji Choi、Satyasheel Sharma、Mijin Jeon、Neeraj Kumar Mishra、Taejoo Jeong、Sangil Han、In Su Kim
DOI:10.1002/adsc.201600297
日期:2016.9.1
The ruthenium(II)‐ or rhodium(III)‐catalyzed pyrimidinyl‐directed Grignard‐type C−H additions of N‐heterocycles with activated aldehydes and ketones are described. A cationic ruthenium catalyst and sodium acetate additive in dichloroethane as solvent were found to be optimal catalytic system for the construction of C‐7 alkylated indolines. In sharp contrast, a cationic rhodium complex allows the generation
Rhodium-Catalyzed C–H Alkylation of Indolines with Allylic Alcohols: Direct Access to β-Aryl Carbonyl Compounds
作者:Sang Hoon Han、Miji Choi、Taejoo Jeong、Satyasheel Sharma、Neeraj Kumar Mishra、Jihye Park、Joa Sub Oh、Woo Jung Kim、Jong Suk Lee、In Su Kim
DOI:10.1021/acs.joc.5b01696
日期:2015.11.6
The rhodium(III)-catalyzed site-selective C–H alkylation of various N-heterocycles, such as indolines, carbazoles, and pyrroles with readily available allylic alcohols is described. This protocol allows the generation of a heterocyclic scaffold containing a β-aryl carbonyl moiety, which is known to be a crucial structural unit of biologically active compounds.