66674-16-6Relevant articles and documents
Enantioconvergent Cu-Catalyzed Radical C-N Coupling of Racemic Secondary Alkyl Halides to Access α-Chiral Primary Amines
Cheng, Jiang-Tao,Dong, Xiao-Yang,Gu, Qiang-Shuai,Li, Zhong-Liang,Liu, Juan,Liu, Xin-Yuan,Luan, Cheng,Wang, Fu-Li,Wang, Li-Lei,Yang, Ning-Yuan,Zhang, Yu-Feng
supporting information, p. 15413 - 15419 (2021/09/30)
α-Chiral alkyl primary amines are virtually universal synthetic precursors for all other α-chiral N-containing compounds ubiquitous in biological, pharmaceutical, and material sciences. The enantioselective amination of common alkyl halides with ammonia is appealing for potential rapid access to α-chiral primary amines, but has hitherto remained rare due to the multifaceted difficulties in using ammonia and the underdeveloped C(sp3)-N coupling. Here we demonstrate sulfoximines as excellent ammonia surrogates for enantioconvergent radical C-N coupling with diverse racemic secondary alkyl halides (>60 examples) by copper catalysis under mild thermal conditions. The reaction efficiently provides highly enantioenrichedN-alkyl sulfoximines (up to 99% yield and >99% ee) featuring secondary benzyl, propargyl, α-carbonyl alkyl, and α-cyano alkyl stereocenters. In addition, we have converted the masked α-chiral primary amines thus obtained to various synthetic building blocks, ligands, and drugs possessing α-chiral N-functionalities, such as carbamate, carboxylamide, secondary and tertiary amine, and oxazoline, with commonly seen α-substitution patterns. These results shine light on the potential of enantioconvergent radical cross-coupling as a general chiral carbon-heteroatom formation strategy.
Novel sulfonamide-based carbamates as selective inhibitors of bche
?těpánková, ?árka,Enriz, Ricardo D.,Garro, Adriana D.,Ho?ek, Jan,Imramovsky, Ale?,Jampílek, Josef,Jendrzejewska, Izabela,Magar, Pratibha,Parravicini, Oscar,Pauk, Karel,Svr?ková, Katarina
, (2021/09/04)
A series of 14 target benzyl [2-(arylsulfamoyl)-1-substituted-ethyl]carbamates was prepared by multi-step synthesis and characterized. All the final compounds were tested for their abil-ity to inhibit acetylcholinesterase (AChE) and butyrylcholinesterase
Chiral pyrazole derivative and synthesis method thereof
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Paragraph 0027-0029; 0040-0042; 0053-0055, (2020/06/20)
The invention belongs to the technical field of organic synthesis, and discloses a chiral pyrazole derivative and a synthesis method thereof. The chiral pyrazole derivative is (1-(4'-amino-5'-carbamoyl-1'-pyrazolyl)-(S)-2-propyl-benzyloxy amide. The synth
