172842-09-0Relevant articles and documents
Asymmetric Methoxyselenenylation of Alkenes with Chiral Ferrocenylselenium Reagents
Fukuzawa, Shin-Ichi,Takahashi, Kaoru,Kato, Hirohisa,Yamazaki, Hiroshi
, p. 7711 - 7716 (1997)
Asymmetric methoxyselenenylation of alkenes was studied using some chiral ferrocenylselenium compounds which were prepared from chiral ferrocenyl-substituted amine, sulfoxide, oxazoline, and pyrrolidine. The highest diastereoselectivity was observed using the chiral amino-substituted ferrocenylserenium triflates in the reaction with trans-β-methylstyrene in an excellent yield. The reaction with silyl enol ethers gave chiral α-seleno ketone with moderate to excellent selectivities. The β,γ-unsaturated ester may be converted into the optically active γ-alkoxy α,β-unsaturated ester using ammonium persulfate in the presence of a catalytic amount of the chiral diferrocenyl diselenide in low optical yields.
163. Chiral diselenides from benzylamines: Catalysts in the diethylzinc addition to aldehydes
Wirth, Thomas,Kulicke, Klaus J.,Fragale, Gianfranco
, p. 1957 - 1966 (2007/10/03)
A series of new chiral diselenides with a N-atom in the side chain was prepared by a short synthetic sequence (Scheme 1). Only 1 mol-% of these diselenides catalyzed very effectively the diethylzinc addition to various aromatic and α,β-unsaturated aldehyd
