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Relevant academic research and scientific papers

Zirconium-catalyzed cycloalumination of alkenes in the one-pot synthesis of 3-substituted 1H-phospholane oxides

A new one-pot synthesis of 3-R-1H-phospholane oxides (57–65% yield) was implemented by reaction of phosphorus tri- or pentahalides with 3-R-1-aluminacyclopentanes (in situ generated by Zr-catalyzed cycloalumination of alkenes). The products are readily P-vinylated by Cu-promoted reaction with alkynes.

Zirconium-catalyzed alkene cycloalumination for the synthesis of substituted phosphines and their transition metal (Mo, Pd) complexes

An original method for the synthesis of substituted phosphines R2P(X)BuR′(R′?=?n-Hex, Bn, napht, cyclo-Hex) and R2P(X)EtR′(R′?=?2-bycyclo[2.2.1]hept-2-yl) (R?=?Et, Ph, X?=?O, S), in 65–72%

Synthesis and transformations of metallacycles 40. Catalytic cycloalumination in the synthesis of 3-substituted phospholanes

An efficient one-pot method was developed for the synthesis of 3-alkyland 3-benzyl-substituted phospholanes through the successive Cp2ZrCl 2-catalyzed cycloalumination of α-olefins in the presence of AlEt3 giving the corre

Aluminacyclopentanes in the synthesis of 3-substituted phospholanes and α,ω-bisphospholanes

An efficient one-pot process for the synthesis of 3-substituted phospholanes and α,ω-bisphospholanes was developed. The method involves the replacement of aluminium in aluminacyclopentanes, prepared in situ by catalytic cycloalumination of α-olefins and α,ω-diolefins, by phosphorus atoms on treatment with dichlorophosphines (R'PCl2). Hydrogen peroxide oxidation and treatment with S8 of the synthesized phospholanes and α,ω-bisphospholanes afforded the corresponding 3-alkyl(aryl)-1-alkyl(phenyl)phospholane 1-oxides, 3-alkyl(aryl)-1-alkyl(phenyl)phospholane 1-sulfides, bisphospholane 1,1'-dioxides, and bisphospholane 1,1'- disulfides in nearly quantitative yields. The complexes LMo(CO)5 (L = 3-hexyl-1-phenylphospholane, 3-benzyl-1-methylphospholane, 1,2-bis(1-phenylphospholan-3-yl)ethane, and 1,6-bis(1-phenylphospholan-3-yl)hexane were prepared by the reaction of 3-substituted phospholanes and α,ω-bisphospholanes with molybdenum hexacarbonyl. The structure of the complexes was proved by multinuclear 1H, 13C, and 31P spectroscopy.

Synthesis and transformations of metallacycles 32. Novel method for the synthesis of cyclopentanols from aluminacyclopentanes

Cyclopentanols were synthesized by a one-pot method involving Cp2ZrCl2-catalyzed cycloalumination of α-olefins with trialkylalanes followed by the in situ reactions of aluminacyclopentanes with esters in the presence of catalytic amounts of Cu, Ni or Pd salts and complexes.

SYNTHESIS AND TRANSFORMATIONS OF METALLOCYCLES. 5. REGIOSELECTIVE SYNTHESIS OF β-SUBSTITUTED ALUMOCYCLOPENTANES BY THE CYCLOMETALLATION OF α-OLEFINS USING Et3Al IN THE PRESENCE OF Cp2ZrCl2

A new method has been proposed for the synthesis of N-, O-, and S-containing alumocyclopentanes by the reaction of Et3Al with functional α-olefins in the presence of catalytic amounts of Cp2ZrCl2.The alumocyclopentanes obtained may react with S8 to give β-substituted tetrahydrothiophenes.