Cross-coupling of nonstabilized aziridinylmagnesiums with alkylhalides catalyzed by Cu(I) iodide: a new synthesis of amines bearing a quaternary chiral center and an asymmetric synthesis of both enantiomers of the amines from one chiral starting material
with Pd(OH)2 in alcohol to give the amines bearing a quaternary chiral center in quantitative yields. Synthesis of both enantiomers of the amines bearing a quaternary chiral center was realized starting from optically active (R)-chloromethyl p-tolyl sulfoxide in good overall yields with perfect asymmetricinduction.
Generation of aziridinyllithiums from sulfinylaziridines by the ligand exchange reaction of sulfoxides with tert-butyllithium: Their properties and an application to asymmetric synthesis of α-dialkylamino acid ester
sulfinylaziridines by the ligand exchange reaction of sulfoxides with tert-butyllithium. The aziridinyllithiums were found to be stable in THF at below −30 °C and reactive with several electrophiles such as carbonyl compounds. Synthesis of an optically active α-dialkylamino acid ester was realized via the aziridinyllithium starting from optically active chloromethyl p-tolyl sulfoxide.
Generation of Aziridinyllithiums from Sulfinylaziridines with tert-Butyllithium: Properties, Reactivity, and Application to a Synthesis of α,α-Dialkylamino Acid Esters and Amides Including an Optically Active Form
aziridinyllithiums having several alkyl groups were investigated. As an extension of this method, a synthesis of α,α-dialkylamino acid esters, including an opticallyactive form, and amides was realized via the aziridinyllithiums. N-Non substituted α,α-dialkylamino acid esters were synthesized starting from N-(4-methoxyphenyl) aldimine.
Alkylation of nonstabilized aziridinylmagnesiums catalyzed by Cu(I) iodide: a new synthesis of amines, including optically active form, bearing a quaternary chiral center
sulfoxide–magnesium exchange, with primary alkyl halides in the presence of Cu(I) iodide as a catalyst, was realized. The alkylated aziridines were converted in quantitative yield to amines bearing a quaternary chiral center by hydrogenation with Pd(OH)2. A synthesis of the opticallyactiveamines, bearing a quaternary chiral center, was realized, starting from opticallyactive (R)-chloromethyl p-tolyl sulfoxide