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
Scalable Electrocatalytic Intermolecular Acylcyanation and Aminocyanation of Alkenes
作者:Xianqiang Kong、Xiaohui Chen、Yiyi Chen、Zhong-Yan Cao
DOI:10.1021/acs.joc.1c03134
日期:2022.6.3
Electrocatalytic three-component acylcyanation and aminocyanation of simple alkenes have been developed. The protocol features high functional group tolerance and can easily be scaled up. The key to success is to use an electrophilic cyanation source, enabling a broadened use of alkenes to aliphatic ones for acylcyanation.
A first example of solvent- and additive-free 1,4-addition reaction of alpha,beta-unsaturated ketones such as chalcones, 3-nonen-2-one and benzalacetone with trimethylsilyl cyanide (TMSCN) is described. The addition of TMSCN to chalcones, 3-nonen-2-one, and benzalacetone under microwave irradiation in the absence of Lewis or Bronsted acids and solvents, yielded the corresponding beta-cyanoketones in good to moderate yields, as quite rapidly as in 5 min. No systematic substituent effect of chalcones on the yields was observed. No reaction of alpha,beta-unsaturated esters such as methyl cinnamate with TMSCN took place under the same conditions. (c) 2007 Published by Elsevier Ltd.
Coudert, P.; Couquelet, J.; Tronche, P., Journal of Heterocyclic Chemistry, 1988, vol. 25, p. 799 - 802
作者:Coudert, P.、Couquelet, J.、Tronche, P.
DOI:——
日期:——
COUDERT, P.;COUQUELET, J.;TRONCHE, P., J. HETEROCYCL. CHEM., 25,(1988) N 3, C. 799-802