Enantiopure Trifluoromethylated β3,3-Amino Acids: Synthesis by Asymmetric Reformatsky Reaction with Stable Analogues of Trifluoromethyl N-tert-Butanesulfinylketoimines and Incorporation into α/β-Peptides
摘要:
Addition of a Reformatsky reagent to alpha-aryl(alkyl) alpha-trifluoromethyl N-tert-butanesulfinyl hemiaminals, bench-stable surrogates of trifluoromethyl ketoimines, provided beta-alkyl(aryl) beta-trifluoromethyl beta-amino acids derivatives in good yields and high diastereoselectivities. The N-tert-butanesulfinyl beta(3,3)-amino esters were further utilized as versatile intermediates for the elaboration of heterodi- and -tripeptides.
Enantiopure Trifluoromethylated β<sup>3,3</sup>-Amino Acids: Synthesis by Asymmetric Reformatsky Reaction with Stable Analogues of Trifluoromethyl <i>N</i>-<i>tert</i>-Butanesulfinylketoimines and Incorporation into α/β-Peptides
作者:Fabienne Grellepois
DOI:10.1021/jo302549v
日期:2013.2.1
Addition of a Reformatsky reagent to alpha-aryl(alkyl) alpha-trifluoromethyl N-tert-butanesulfinyl hemiaminals, bench-stable surrogates of trifluoromethyl ketoimines, provided beta-alkyl(aryl) beta-trifluoromethyl beta-amino acids derivatives in good yields and high diastereoselectivities. The N-tert-butanesulfinyl beta(3,3)-amino esters were further utilized as versatile intermediates for the elaboration of heterodi- and -tripeptides.
Diastereoselective Addition of Organomagnesium and Organolithium Reagents to Chiral Trifluoromethyl<i>N</i>-<i>tert</i>-Butanesulfinyl Hemiaminals
作者:Fabienne Grellepois、Abdelkhalek Ben Jamaa、Abdoulaye Gassama
DOI:10.1002/ejoc.201300890
日期:2013.10
The asymmetricsynthesis of trifluoromethylated tertiary and secondary carbinamines (α,α-dibranched and α-branched amines) was achieved by reaction of alkyl, aryl and allyl organomagnesium or organolithium reagents to trifluoromethyl N-tert-butanesulfinyl hemiaminals, bench-stable analogs of the corresponding ketoimines.