Conjugate addition of nitroalkanes to α,β-unsaturated carbonyl compounds occurs in the presence of basic alumina without a solvent. Yields are fair to good also with substrates which are acid or base sensitive.
Electrochemical synthesis of geminal azidonitro compounds
作者:Yu. N. Ogibin、A. I. Ilovaisky、V. M. Merkulova、G. I. Nikishin
DOI:10.1007/s11172-005-0154-2
日期:2004.11
An electrochemical method for the synthesis of geminal azidonitro compounds was developed. The method involves electrooxidative coupling of azide anions with salts of nitro compounds and affords geminal azidonitroalkanes, azidonitrocycloalkanes, and diazidodinitrocycloalkanes in 45–92% yields.
Palladium-Catalyzed α-Allylation of Secondary Nitroalkanes with Allylic Alcohols and Strategic Exploitation of Seebach’s Reagent for the Total Synthesis of (±)-Adalinine
作者:Chieh-Yu Chang、Yen-Ku Wu
DOI:10.1021/acs.joc.8b00710
日期:2018.6.1
method is reported for the catalytic direct coupling of allylic alcohols and nitroalkanes. In the allylation process, the synergistic action of palladium complexes and titanium(IV) alkoxide facilitates the formation of nitronate and π-allylpalladium intermediate. In the cases of reluctant allylations, typically with sterically demanding nitroalkanes, we found the addition of substoichiometric amount
Bifunctional Heterogeneous Catalysis of Silica-Alumina-Supported Tertiary Amines with Controlled Acid-Base Interactions for Efficient 1,4-Addition Reactions
We report the first tunable bifunctional surface of silica–alumina‐supported tertiary amines (SA–NEt2) active for catalytic 1,4‐addition reactions of nitroalkanes and thiols to electron‐deficient alkenes. The 1,4‐addition reaction of nitroalkanes to electron‐deficient alkenes is one of the most useful carbon–carbon bond‐forming reactions and applicable toward a wide range of organic syntheses. The
A New Approach to Nitrones through Cascade Reaction of Nitro Compounds Enabled by Visible Light Photoredox Catalysis
作者:Cheng-Wei Lin、Bor-Cherng Hong、Wan-Chen Chang、Gene-Hsiang Lee
DOI:10.1021/acs.orglett.5b00684
日期:2015.5.15
irradiation photocatalytic process. The mild, efficient, and environmentally benign reaction method, involving dynamic reciprocations of cascade pathways, comprises a mixture of a Ru(bpy)3Cl2 photoredox catalyst and DIPIBA or Hünig’s base in CH3CN. Notably, DIPIBA was found to be the best additive for the cross condensation reaction of nitroalkanes with aldehydes. The structures of appropriate products were