Iron-Catalyzed Tandem Cyclization and Cross-Coupling Reactions of Iodoalkanes and Aryl Grignard Reagents
作者:Jae Gon Kim、Young Hoon Son、Jin Won Seo、Eun Joo Kang
DOI:10.1002/ejoc.201403511
日期:2015.3
Several experimental results, such as cyclopropyl ring opening, the stereochemical outcome of the reaction with a secondary iodide substrate, and intermediate identification with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO), support the conclusion that a radical process is involved in this catalytic system. Moreover, deuterium labeling experiments indicated that radical disproportionation could occur in
Copper-Catalyzed Dicarbofunctionalization of Unactivated Olefins by Tandem Cyclization/Cross-Coupling
作者:Surendra Thapa、Prakash Basnet、Ramesh Giri
DOI:10.1021/jacs.7b01922
日期:2017.4.26
We present a strategy that difunctionalizes unactivated olefins in 1,2-positions with two carbon-based entities. This method utilizes alkyl/arylzinc reagents derived from olefin-tethered alkyl/aryl halides that undergo radical cyclization to generate C(sp3)-Cu complexes in situ, which are intercepted with aryl and heteroaryl iodides. A variety of (arylmethyl)carbo- and heterocycles (N, O) can be synthesized
We have developed a one-potring-closingmetathesis (RCM)/oxidation methodology to yield various 2-quinolines from 2-vinyl-N-allylaniline derivatives. This is a first example of an oxidation involving methylene (CH2) groups with modified Grubbs-type ruthenium complexes. Hence, this adds an example of a non-methathesis reaction using a ruthenium carbene catalyst.
The environmentally benign synthesis of indoline boronic esters, especially through a way of arylboration to alkenes, remains a challenge due to the use of transition metals or high-temperature conditions. We described a photoinduced metal-free arylboration of unactivatedalkenes for the synthesis of indoline boronic esters and 1,2,3,4-tetrahydroquinoline boronic ester in good yields. This approach