Nickel-Catalyzed Reversible Functional Group Metathesis between Aryl Nitriles and Aryl Thioethers
作者:Tristan Delcaillau、Philip Boehm、Bill Morandi
DOI:10.1021/jacs.1c00529
日期:2021.3.17
We describe a new functional group metathesis between aryl nitriles and aryl thioethers. The catalytic system nickel/dcype is essential to achieve this fully reversible transformation in good to excellent yields. Furthermore, the cyanide- and thiol-free reaction shows high functional group tolerance and great efficiency for the late-stage derivatization of commercial molecules. Finally, synthetic applications
Ni-Catalyzed Reductive Cyanation of Aryl Halides and Phenol Derivatives via Transnitrilation
作者:L. Reginald Mills、Joshua M. Graham、Purvish Patel、Sophie A. L. Rousseaux
DOI:10.1021/jacs.9b11208
日期:2019.12.11
reductive coupling for the synthesis of benzonitriles from aryl (pseudo)halides and an electrophilic cyanating reagent, 2-methyl-2-phenyl malononitrile (MPMN). MPMN is a bench-stable, carbon-bound electrophilic CN reagent that does not release cyanide under the reaction conditions. A variety of medicinally relevant benzonitriles can be made in good yields. Addition of NaBr to the reaction mixture allows for
Catalytic Asymmetric Synthesis of α-Arylpyrrolidines and Benzo-fused Nitrogen Heterocycles
作者:Xi-Jie Dai、Oliver D. Engl、Thierry León、Stephen L. Buchwald
DOI:10.1002/anie.201814331
日期:2019.3.11
heteroarenes render this method a practical and versatile approach for pyrrolidine synthesis. Additionally, this intramolecular hydroamination strategy facilitates the asymmetric synthesis of tetrahydroisoquinolines and medium‐ring dibenzo‐fused nitrogen heterocycles.
A Dual Palladium and Copper Hydride Catalyzed Approach for Alkyl-Aryl Cross-Coupling of Aryl Halides and Olefins
作者:Stig D. Friis、Michael T. Pirnot、Lauren N. Dupuis、Stephen L. Buchwald
DOI:10.1002/anie.201703400
日期:2017.6.12
We report an efficient means of sp2–sp3 crosscoupling for a variety of terminal monosubstituted olefins with aryl electrophiles using Pd and CuH catalysis. In addition to its applicability to a range of aryl bromide substrates, this process was also suitable for electron‐deficient aryl chlorides, furnishing higher yields than the corresponding aryl bromides in these cases. The optimized protocol does
A compound of formula (I) or a pharmaceutically acceptable salt or prodrug ester thereof:
wherein the groups R1-R6 and A are as defined in the specification.