Facile synthesis of β,β′-diketophosphine sulfides from imines and Lawesson’s reagent
作者:Hosni Slimani、Soufiane Touil
DOI:10.1016/j.tetlet.2011.09.110
日期:2011.11
In a convenient one-pot sequence, treatment of imines with Lawesson’s reagent (LR) followed by hydrolytic work-up leads to β,β′-diketophosphine sulfides in good to excellent yields. These compounds were isolated exclusively in their tautomeric β-keto-β′-enol form as was evident from IR and NMR spectroscopic data.
Intramolecular reductive Heck reaction in the synthesis of 3,3-disubstituted isoindolin-1-ones
作者:M. A. Ashatkina、A. N. Reznikov、S. Yu. Vostrukhina、D. S. Nikerov、Yu. N. Klimochkin
DOI:10.1007/s11172-023-3963-2
日期:2023.8
An efficient approach to the synthesis of 3,3-disubstituted isoindolinones by intramolecular cyclization of enamides in the presence of the Pd(OAc)2/Ph3P catalytic system and sodium formate as a reducing agent was suggested.
提出了一种在 Pd(OAc) 2 /Ph 3 P 催化体系和甲酸钠作为还原剂存在下通过烯酰胺分子内环化合成 3,3-二取代异吲哚啉酮的有效方法。
Application of tris(trimethylsilyl) phosphite as convenient phosphorus nucleophile in the direct synthesis of tetrasubstituted α-aminophosphonic acids from ketimines
作者:Bogdan Boduszek、Tomasz K. Olszewski
DOI:10.3998/ark.5550190.p009.773
日期:——
various ketimines leads directly to tetrasubstituted αaminophosphonic acids. The presented reaction proceeds readily at room temperature and provides labile silylated esters of tetrasubstituted α-aminophosphonic acids, as non-isolable reaction intermediates. Subsequent methanolysis of the latter provides the desired α-aminophosphonic acids bearing an fully substituted α-carbon in good overall yields as crystalline
Base-Catalyzed [3 + 2] Cycloaddition of <i>N-</i>Benzyl Ketimines to Arylacetylenes Followed by Oxidation: A One-Pot Access to Polyarylated 2<i>H</i>-Pyrroles via Intermediate Pyrrolines
作者:Ivan A. Bidusenko、Elena Yu. Schmidt、Igor A. Ushakov、Alexander V. Vashchenko、Boris A. Trofimov