4566-58-9Relevant academic research and scientific papers
Direct introduction of nitrogen and oxygen functionality with spatial control using copper catalysis
Shaum, James B.,Fisher, David J.,Sroda, Miranda M.,Limon, Luis,De Alaniz, Javier Read
, p. 8748 - 8752 (2018/12/10)
Synthetic chemists have spent considerable effort optimizing the synthesis of nitrogen and oxygen containing compounds through a number of methods; however, direct introduction of N- and O-functionality remains challenging. Presented herein is a general method to allow for the simultaneous installation of N- and O-functionality to construct unexplored N-O heterocyclic and amino-alcohol scaffolds. This transformation uses earth abundant copper salts to facilitate the formation of a carbon-centered radical and subsequent carbon-nitrogen bond formation. The intermediate aminoxyl radical is terminated by an intramolecularly appended carbon-centered radical. We have exploited this methodology to also access amino-alcohols with a range of aliphatic and aromatic linkers.
Water promoted iodotrimethyl silane reactions: Reductive cleavage of isoxazolidines and 2,1-benzisoxazoles to γ-amino alcohols and o-aminobenzophenones
Boruah, Monalisa,Konwar, Dilip
, p. 601 - 603 (2007/10/03)
Water promoted iodotrimethyl silane [ITMS] reductively cleaved isoxazolidines and 2,1-benzisoxazoles to γ-amino alcohols and o-aminobenzophenones respectively at shorter times and in higher yields at room temperature.
Zn-AlCl3.6H2O-THF system: A mild and convenient reducing agent for isoxazolidines to 1,3-amino alcohols
Boruah, Monalisa,Konwar, Dilip
, p. 232 - 233 (2007/10/03)
The Zn-AlCl3.6H2O-THF system reduces isoxazolidines to 1,3-amino alcohols at room temperature.
Functionalized organolithium compounds of DTBB-catalyzed sulfur-lithium exchange
Foubelo, Francisco,Gutiérrez, Ana,Yus, Miguel
, p. 503 - 514 (2007/10/03)
The successive reaction of β- or γ-hydroxy or amino phenyl thioethers (1,4) with butyllithium and an excess of lithium powder in the presence of a catalytic amount of DTBB in THF at - 78°C leads to the formation of the corresponding β- or γ-functionalized organolithium compounds 2 or 5, respectively, which by treatment with different electrophiles [D2O, t- BuCHO, PhCHO, Me2CO, (CH2)4CO, (CH2)5CO] at temperatures ranging between - 78°C and room temperature yields, after hydrolysis with water, the expected functionalized alcohols or amines 3 or 6, respectively, in a completely regioselective manner.
β-Functionalised organolithium compounds through a sulfur-lithium exchange
Foubelo, Francisco,Gutierrez, Ana,Yus, Miguel
, p. 4837 - 4840 (2007/10/03)
The successive reaction of different β-hydroxy or β-amino tbioethers 1a-d with n-butyl-lithium and an excess of lithium powder and a catalytic amount of DTB in THF at -78°C leads to the formation of the corresponding β-functionalised organolithium compounds 2a-d, which by reaction with several electrophiles [D2O, Bu(t)CHO, PhCHO, Me2CO, (CH2)5CO] at temperatures ranging between -78 and 20°C yields, after hydrolysis with water, the expected functionalised alcohols or amines 3aa-de in a regioselective manner.
Diastereoselective Reduction of Acyclic N-Aryl-β-amino Ketones
Pilli, R. A.,Russowsky, D.,Dias, L. C.
, p. 1213 - 1214 (2007/10/02)
A stereoselective route to anti- and syn-N-aryl-γ-amino alcohols is reported featuring the reduction of the corresponding β-amino ketones with Et3BHLi or Zn(BH4)2, respectively.
β-Substituted Organolithium Compounds. Reaction with Alkyl Halides, Dimethyl Disulfide, and Imines
Barluenga, Jose,Fananas, Francisco J.,Villamana, Jorge,Yus, Miguel
, p. 1560 - 1564 (2007/10/02)
The reaction of β-substituted organolithium derivatives with several electrophiles leads to mono- as well as bifunctionalized organic compounds.Thus, by treatment of these dianions with alkyl halides a direct attack on the carbanionic carbon atom is performed, giving as a result substituted amines.When dimethyl disulfide is used, β-amino and β-hydroxy thioethers are obtained.Finally, on reaction with imines, 1-amino-3-hydroxy compounds and 1,3-diamines are obtained.Since these dianions are easily preparated by mercury-lithium transmetalation from β-substituted organomercurials resulting from the addition of mercury(II) salts to olefins, this whole process gives an appropriate way of functionalizing olefins.
