One-pot synthesis of polysubstituted indoles from aliphatic nitro compounds under mild conditions
作者:Christopher A. Simoneau、Alexis M. Strohl、Bruce Ganem
DOI:10.1016/j.tetlet.2007.01.031
日期:2007.3
Polysubstitutedindoles can be prepared directly from functionalized nitroalkanes under very mildly acidic conditions in a simple, one-pot, two-stage procedure.
Merrifield Resin−C<sub>6</sub>H<sub>4</sub>CH<sub>2</sub>N<sub>3</sub>P(MeNCH<sub>2</sub>CH<sub>2</sub>)<sub>3</sub>N: An Efficient Reusable Catalyst for Room-Temperature 1,4-Addition Reactions and a More Convenient Synthesis of Its Precursor P(MeNCH<sub>2</sub>CH<sub>2</sub>)<sub>3</sub>N
作者:Reddy、John G. Verkade
DOI:10.1021/jo062505z
日期:2007.4.1
donors were efficiently catalyzed at room temperature by the title reusable Merrifield resin-supported catalyst. Advantages of this catalyst include a simple workup (filtration of the reaction mixture) and good to excellent product yields. We also report a substantially simplified synthesis of the commercially available strong nonionic base 1, a precursor to the title polymer-bound catalyst.
The Michaelreaction of various nitroalkanes 1 with electrophilic alkenes 2 can be performed in NaOH (0.025−0.1 M), without any organic solvent. In many cases the presence of cetyltrimethylammonium chloride (CTACl), as cationic surfactant, produces better results. Good yields of the products 3 are obtained even with hindered, and functionalized starting materials.
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