Efficient Asymmetric Synthesis of α-Trifluoromethyl-Substituted Primary Amines via Nucleophilic 1,2-Addition to Trifluoroacetaldehyde SAMP− or RAMP−Hydrazone
作者:Dieter Enders、Kazumasa Funabiki
DOI:10.1021/ol015869g
日期:2001.5.1
[GRAPHICS]An efficient asymmetric synthesis of alpha -trifluoromethyl-substituted primary amines via nucleophilic 1,2-addition of alkyllithium reagents to trifluoroacetaldehyde SAMP- or RAMP-hydrazone followed by benzoylation and SmI2-promoted nitrogen-nitrogen single bond cleavage is described.
Solvent-Free Stereoselective Synthesis of (E)-Trifluoromethyl Imines and Hydrazones
ketimines, aldimines, and hydrazones starting from the corresponding trifluoromethyl carbonyl compounds or their hemiacetals is reported. The condensation reactions were performed under solvent-free conditions with a range of amines or hydrazines and proceeded with high stereoselectivity, always giving only the E-isomer in very good yields. fluorinated compounds - imines - hydrazones - stereoselectivity
An efficient asymmetric synthesis of both enantiomers of α-trifluoromethylated homoallylamine via nucleophilic allylation of trifluoroacetaldehyde SAMP- or RAMP-hydrazone, followed by benzoylation and SmI2-promoted nitrogen-nitrogen single bond cleavage is described.