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.
α-Trifluoromethylated tertiary homoallylic amines: diastereoselective synthesis and conversion into β-aminoesters, γ- and δ-aminoalcohols, azetidines and pyrrolidines
作者:Fabienne Grellepois、Abdelkhalek Ben Jamaa、Nathalie Saraiva Rosa
DOI:10.1039/c7ob02506h
日期:——
The diastereoselective addition of allyl zinc and allylindium derivatives to α-trifluoromethyl N-tert-butanesulfinyl hemiaminals, bench stable precursors of aryl and alkyl trifluoromethyl ketimines, allows the synthesis of homoallylic amines containing a tetrasubstituted carbon stereocentre bearing a trifluoromethyl group with good diastereoselectivities (up to dr > 99 : 1). This approach was also
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.
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.
A General and Highly Selective Method for the Asymmetric Synthesis of Trifluoromethyl-Substituted<i>α</i>- and<i>β</i>-Aminophosphonates
作者:Lijing Wang、Qilong Shen、Long Lu
DOI:10.1002/cjoc.201300344
日期:2013.7
A highly selective method for the asymmetric formation of trifluoromethyl‐substitutedα‐ and β‐aminophosphonates was described. The reaction proceeded with high yields and good to excellent diastereoselectivity. The product can be easily converted into corresponding trifluoromethyl‐substituted aminophosphoric acids.