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.
reported. By taking advantage of the in situ generated α-CF3-benzylsilver intermediates derivedfrom the nucleophilic addition of silver fluoride to gem-difluoroalkenes, this strategy bypasses the use of a strong base, thus enabling a mild and general synthetic method for ready access to non-symmetric α,α-disubstituted trifluoroethane derivatives.
作者:Christoph Heinz、J. Patrick Lutz、Eric M. Simmons、Michael M. Miller、William R. Ewing、Abigail G. Doyle
DOI:10.1021/jacs.7b12212
日期:2018.2.14
describes a three-component, Ni-catalyzed reductive coupling that enables the convergent synthesis of tertiary benzhydryl amines, which are challenging to access by traditional reductive amination methodologies. The reaction makes use of iminium ions generated in situ from the condensation of secondary N-trimethylsilyl amines with benzaldehydes, and these species undergo reaction with several distinct classes
Discovery of Pyrazine-Carboxamide-Diphenyl-Ethers as Novel Succinate Dehydrogenase Inhibitors via Fragment Recombination
作者:Hua Li、Meng-Qi Gao、Yan Chen、Yu-Xia Wang、Xiao-Lei Zhu、Guang-Fu Yang
DOI:10.1021/acs.jafc.0c05646
日期:2020.11.25
and recombined to produce a pyrazine-carboxamide-diphenyl-ether scaffold as a new SDHI. After substituent optimization, compound 6y was successfully identified with good inhibitoryactivity against porcine SDH, which was about 2-fold more potent than pyraziflumid. Furthermore, compound 6y exhibited 95% and 80% inhibitory rates against soybean gray mold and wheat powdery mildew at a dosage of 100 mg/L
We report an improved method for in situ generation of the Ohira–Bestmann reagent. Using the recently reported bench-stable imidazole-1-sulfonylazide as diazotransferreagent, this new method represents a scalable and convenient approach for the transformation of aldehydes into terminal alkynes. The method features an easier workup compared to the existing in situ protocol due to increased aqueous