Cyano-borrowing reaction: nickel-catalyzed direct conversion of cyanohydrins and aldehydes/ketones to β-cyano ketone
作者:Zhao-Feng Li、Qian Li、Li-Qing Ren、Qing-Hua Li、Yun-Gui Peng、Tang-Lin Liu
DOI:10.1039/c9sc00640k
日期:——
nickel-catalyzed, high atom- and step-economical reaction of cyanohydrins with aldehydes or ketones via an unprecedented “cyano-borrowing reaction” has been developed. Cleavage of the C–CN bond of cyanohydrins followed by aldol condensation and conjugate addition of cyanide to α,β-unsaturated ketones proceeded to deliver a range of racemic β-cyano ketones with good to high yields. The practical procedure
Titanium-Catalyzed Cyano-Borrowing Reaction for the Direct Amination of Cyanohydrins with Ammonia
作者:Qing-Hua Li、Zhao-Feng Li、Jing Tao、Wan-Fang Li、Li-Qing Ren、Qian Li、Yun-Gui Peng、Tang-Lin Liu
DOI:10.1021/acs.orglett.9b03194
日期:2019.10.18
intermedia in organic chemistry. Herein, the directamination of cyanohydrins with the partner of ammonia to synthesis N-unprotected α-aminonitriles is developed. The reaction proceeds via titanium-catalyzed cyano-borrowing reaction, which features high atom economy and simple operation. A broad range of ketone or aldehyde cyanohydrins was tolerated with ammonia, and the N-unprotected α-aminonitriles were
Facile one-pot preparation of 2-arylpropionic and arylacetic acids from cyanohydrins by treatment with aqueous HI
作者:Andrea Aramini、Manolo R. Sablone、Gianluca Bianchini、Alessia Amore、Michela Fanì、Plinio Perrone、Alberto Dolce、Marcello Allegretti
DOI:10.1016/j.tet.2009.01.005
日期:2009.3
treatment with aqueous HI, fromcyanohydrins. The hydrogenolytic reduction of α-hydroxy-2-arylpropionic acids was the key step of the process and the optimization of the reaction conditions led to identify aqueous HI as an appropriate and selective reagent for the reductive deoxygenation of cyanohydrins. The synthetic route described a general and efficient strategy for the preparation of large libraries of