Thiol-Catalyzed Radical Decyanation of Aliphatic Nitriles with Sodium Borohydride
作者:Takuji Kawamoto、Kyohei Oritani、Dennis P. Curran、Akio Kamimura
DOI:10.1021/acs.orglett.8b00626
日期:2018.4.6
Radical decyanation of aliphaticnitriles was achieved in the presence of NaBH4 and a thiol. The reaction proceeds via a radical mechanism involving borane radical anion addition to nitrile to form an iminyl radical, which undergoes carbon–carbon cleavage. Reductive radical addition to acrylonitrile is followed by decyanation to give a two-carbon homologated product in a net radical ethylation reaction
1-Butyl-3-methylimidazol-2-ylidene Borane: A Readily Available, Liquid N-Heterocyclic Carbene Borane Reagent
作者:Daniel A. Bolt、Dennis P. Curran
DOI:10.1021/acs.joc.7b02730
日期:2017.12.15
1-Butyl-3-methylimidazol-2-ylidene borane has been synthesized directly from two inexpensive commercial reagents: 1-butyl-3-methylimidazolium bromide and sodium borohydride. This NHC-borane reagent is a stable, free-flowing liquid that shows promise for use in radical, ionic, and metal-catalyzed reactions.
Titanocene(II)-promoted desulfurizative acylation of thioacetals with alkanenitriles
作者:Takeshi Takeda、Haruhiko Taguchi、Tooru Fujiwara
DOI:10.1016/s0040-4039(99)02001-8
日期:2000.1
Ketones were obtained in good yields by titanocene(II)-promoted reaction of thioacetals with alkanenitriles. The regioselective formation of α-substituted ketone was observed when the reaction was carried out in the presence of methyl iodide or benzyl bromide.
New synthesis of multi-substituted α-chlorocyclobutanones from 1-chloro-3-cyanoalkyl p-tolyl sulfoxides by 4-Exo-Dig nucleophilic ring closure of magnesium carbenoids to nitrile group as the key reaction
prepared from 1-chlorovinyl p-tolyl sulfoxides, which were synthesized fromcarbonylcompounds and chloromethyl p-tolyl sulfoxide, with lithium α-cyano carbanion of acetonitrile derivatives in good yields. Treatment of these sulfoxides with i-PrMgCl resulted in the formation of multi-substituted α-chlorocyclobutanones in good to high yields via the 4-Exo-Dig nucleophilic ring closure of the generated magnesium
Reductive decyanation of α-cyano and α-alkoxycarbonyl substituted nitriles promoted by samarium(II) iodide
作者:Han-Young Kang、Woo Sang Hong、Yong Seo Cho、Hun Yeong Koh
DOI:10.1016/0040-4039(95)01606-i
日期:1995.10
Decyanation of geminaldinitriles and α-alkoxycarbonyl substituted nitriles promoted by samarium(II) iodide has been efficiently achieved. This method has advantages over the previously known radical route using tin hydride with respect to applicable substrates and the reaction temperature employed. This decyanation could broaden the synthetic applicability of the nitrile derivatives.