New entries to 2(1H)-quinolinones and 2H-1-benzazepin-2-ones by acid-catalyzed olefin cyclization of N-(o-(alk-1-enyl)phenyl)-2-(methylsulfinyl)acetamides.
An electrochemical synthesis of functionalized (aza)indolinesthrough dehydrogenative [3+2] annulation of arylamines with tethered alkenes has been developed. Previous reported syntheses through similar inter‐ and intramolecular annulation reactions required noble‐metal catalysts and are mostly limited to terminal alkenes or 1,3‐dienes. The electrosynthesis employs the easily available and inexpensive
作者:Andrew Whyte、Katherine I. Burton、Jingli Zhang、Mark Lautens
DOI:10.1002/anie.201808460
日期:2018.10.15
An enantioselective copper‐catalyzed intramolecular borylacylation is reported. The reaction proceeds through an initial enantioselective borylcupration of the styrene, followed by a nucleophilic attack on the tethered carbamoyl chloride. The products, chiral borylated 3,3‐disubstituted oxindoles, were generated in excellent yields and enantioselectivities. The versatile carbon–boron bond provides
Asymmetric Cycloisomerization of <i>o</i>
-Alkenyl-<i>N</i>
-Methylanilines to Indolines by Iridium-Catalyzed C(sp<sup>3</sup>
)−H Addition to Carbon-Carbon Double Bonds
diphosphine effectively promotes the intramolecular addition of the C(sp3)−H bond across a carbon–carbon double bond in a highly enantioselective fashion. The reaction gives indolines bearing a quaternary stereogenic carbon center at the 3‐position. The reactionmechanism involves rate‐determining oxidative addition of the N‐methyl C−H bond, followed by intramolecular carboiridation and subsequent reductive
Nickel/Photo-Cocatalyzed Asymmetric Acyl-Carbamoylation of Alkenes
作者:Pei Fan、Yun Lan、Chang Zhang、Chuan Wang
DOI:10.1021/jacs.9b12554
日期:2020.2.5
of pendant alkenes tethered on aryl carbamic chlorides with both aliphatic and aromatic aldehydes has been developed via the cooperative catalysis of a chiral nickel-PHOX complex and tetrabutylammonium deca-tungstate. This reaction represents the first example of merging hydrogen-atom-transfer photochemistry and asymmetric transition metal catalysis in difunctionalization of alkenes. Using this protocol
A Copper-Catalyzed Aerobic [1,3]-Nitrogen Shift through Nitrogen-Radical 4-<i>exo</i>
-trig Cyclization
作者:Yan Li、Rui Wang、Tao Wang、Xiu-Fen Cheng、Xin Zhou、Fan Fei、Xi-Sheng Wang
DOI:10.1002/anie.201709894
日期:2017.11.27
shift catalyzed by copper diacetate under an oxygen atmosphere (1 atm) has been developed for the construction of a diverse range of indole derivatives from α,α‐disubstituted benzylamine. In this reaction, oxygen was used as a clean terminal oxidant, and water was produced as the only by‐product. Five inert bonds were cleaved, and two C−N bonds and one C−C double bond were constructed in one pot during