39199-22-9Relevant articles and documents
Synthesis of Vicinal Quaternary All-Carbon Centers via Acid-catalyzed Cycloisomerization of Neopentylic Epoxides
Schmid, Matthias,Sokol, Kevin R.,Wein, Lukas A.,Torres Venegas, Sofia,Meisenbichler, Christina,Wurst, Klaus,Podewitz, Maren,Magauer, Thomas
supporting information, p. 6526 - 6531 (2020/09/02)
We report our studies on the development of a catalytic cycloisomerization of 2,2-disubstituted neopentylic epoxides to produce highly substituted tetralins and chromanes. Termination of the sequence occurs via Friedel-Crafts-type alkylation of the remote (hetero)arene linker. The transformation is efficiently promoted by sulfuric acid and proceeds best in 1,1,1,3,3,3-hexafluoroisopropanol (HFIP) as the solvent. Variation of the substitution pattern provided detailed insights into the migration tendencies and revealed a competing disproportionation pathway of dihydronaphthalenes.
Biomimetic transfer hydrogenation of 2-alkoxy- and 2-aryloxyketones with iron-porphyrin catalysts
Enthaler, Stephan,Spilker, Bj?rn,Erre, Giulia,Junge, Kathrin,Tse, Man Kin,Beller, Matthias
, p. 3867 - 3876 (2008/09/20)
In situ generated iron porphyrins are applied as homogeneous catalysts in the transfer hydrogenation of α-substituted ketones. Using 2-propanol as hydrogen donor various protected 1,2-hydroxyketones are reduced to the corresponding mono-substituted 1,2-di
Synthesis and reactivity of α-halomethyl ketimines
De Kimpe,De Cock,Stevens
, p. 2739 - 2760 (2007/10/02)
The synthesis of N-(1-halo-2-alkylidene)amines, i.e. α-halomethyl ketimines, is described for the first time, utilizing the TiCl4-induced condensation of α-halomethyl ketones with primary amines. The reactivity of these new α-halomethylketimines was studied with respect to nucleophiles such as iodide, cyanide, alcohols, alkoxides, amines and thiolates. α-Halomethyl ketimines are powerful ambident electrophiles which underwent a variety of reactions leading to functionalized imines and heterocycles.