Pd(II)-Catalyzed Enantioselective C–H Activation/C–O Bond Formation: Synthesis of Chiral Benzofuranones
摘要:
Pd(II)-catalyzed enantioselective C-H activation of phenylacetic acids followed by an intramolecular C-O bond formation afforded chiral benzofuranones. This reaction provides the first example of enantioselecctive C-H functionalizations through Pd(II)/Pd(IV) redox catalysis.
Ligand-Accelerated Palladium(II)-Catalyzed Enantioselective Amination of C(sp<sup>2</sup>)–H Bonds
作者:Xiu-Fen Cheng、Fan Fei、Yan Li、Yi-Ming Hou、Xin Zhou、Xi-Sheng Wang
DOI:10.1021/acs.orglett.0c02216
日期:2020.8.21
The first example of the Pd(II)-catalyzed enantioselective amination of aryl C–H bonds is reported. The key to the successful realization of this asymmetric catalytic transformation was the identification of mono-N-protected α-amino-O-methylhydroxamic acid (MPAHA) ligands, which promote reactivity under mild conditions and control enantioselectivity. The counteranions in the solvent medium, hexafluoroacetylacetate
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
Room-Temperature Bismuth-Catalyzed Bis-arylation of Carbonyl Compounds with Aryl Ethers and Phenols
作者:Congrong Liu、Manbo Li
DOI:10.1002/cjoc.201300522
日期:2013.10
Using Bi2(SO4)3 as the catalyst and TMSCl as the additive, a wide variety of aldehydes, ketones, and acetals were smoothly condensed with arylethers at room temperature to provide the corresponding diarylmethanes and triarylmethanes selectively in good to excellent yields.
Enantioselective CH Arylation Strategy for Functionalized Dibenzazepinones with Quaternary Stereocenters
作者:Tanguy Saget、Nicolai Cramer
DOI:10.1002/anie.201303816
日期:2013.7.22
Tada! Highly functionalized chiraldibenzazepinones are obtained by a mild palladium(0)‐catalyzed enantioselective CH arylation with excellent selectivities by using simple taddol phosphoramidite ligands. The amide tether allows exclusive regioselectivity through a rare eight‐membered palladacycle intermediate.
Electrochemical Decarboxylative Elimination of Carboxylic Acids to Alkenes
作者:Jiage Yu、Teng Liu、Wanhao Sun、Yunfei Zhang
DOI:10.1021/acs.orglett.3c02997
日期:2023.11.3
An electrochemical strategy for the decarboxylative elimination of carboxylic acids to alkenes at room temperature has been developed. This mild and oxidant-free method provides a green alternative to traditional thermal decarboxylation reactions. Structurally diverse aliphatic carboxylic acids, including biologically active drugs, underwent smooth conversion to the corresponding alkenes in good to