41029-45-2Relevant articles and documents
A unified approach to quinolizinium cations and related systems by ring-closing metathesis
Nunez, Ana,Cuadro, Ana M.,Alvarez-Builla, Julio,Vaquero, Juan J.
, p. 4125 - 4127 (2004)
(Chemical Equation Presented) The first example of an olefin ring-closing metathesis reaction on cationic heteroaromatic systems is described. Dihydroquinolizinium cations and a variety of related cationic systems are synthesized in an efficient approach from N-alkenyl α-vinyl azinium salts using Grubbs' catalysts.
Synthesis of tertiary alkyl fluorides and chlorides by site-selective nucleophilic ring-opening reaction of α-aryl azetidinium salts
Kawai, Kohei,Tayama, Eiji
, p. 39607 - 39618 (2021/12/27)
Site-selective nucleophilic ring-opening reactions of 2-arylazetidine-2-carboxylic acid ester-derived tetraalkyl ammonium salts2with tetrabutylammonium halides (Bu4NX) to give tertiary alkyl halides are successfully demonstrated. For example, a nucleophilic ring-opening reaction of 2-(o-tolyl) derivative2awith 1.2 equivalents of tetrabutylammonium fluoride (Bu4NF) in THF at 60 °C preferentially proceeded at a more substituted carbon atom (2-position) compared to a less-substituted carbon atom (4-position) and affordedtert-butyl 4-(dimethylamino)-2-fluoro-2-(o-tolyl)butanoate3aain 71% yield as the corresponding tertiary alkyl fluoride. This result was applied to synthesize optically active organofluorine compounds starting from commercially available (R)-1-phenylethylamine.
Conformationally restricted pyrrolidines by intramolecular [2+2] photocycloaddition reactions
Fort, Diego A.,Woltering, Thomas J.,Nettekoven, Matthias,Knust, Henner,Bach, Thorsten
supporting information, p. 2989 - 2991 (2013/05/09)
Intramolecular [2+2] photocycloaddition reactions of diversely substituted N-Boc protected 4-(allylaminomethyl)-2(5H)-furanones resulted in rigid products (53-75%) with three spatially defined positions for further functionalisation. The Royal Society of Chemistry.