K. Surya Prakash, G. Mandal, Mihirbaran Stereoselective Synthesis of Trifluoromethylated Vicinal Ethylenediamines with α-Amino <i>N</i>-<i>tert</i>-Butanesulfinimines and TMSCF<sub>3</sub> Isolable α-amino <i>N</i>-<i>tert</i>-butanesulfinimines were prepared through the condensation of Reetz's α-amino aldehydes (prepared from α-amino acids) with Ellman's (<i>R</i>)-<i>N</i>-<i>tert</i>-butanesufinamide without any racemization, and these were trifluoromethylated with TMSCF<sub>3</sub> and TMAF (tetramethylammonium fluoride) to the corresponding vicinal ethylenediamines derivatives. Imines derived from l-amino acids gave exclusively one diastereomer with a very high yield. tetramethylammonium fluoride;acid;TMSCF 3;vicinal ethylenediamines derivatives;Trifluoromethylated Vicinal Ethylenediamines;TMAF;tert;Stereoselective Synthesis 2002-05-15
    https://acs.figshare.com/articles/journal_contribution/Stereoselective_Synthesis_of_Trifluoromethylated_Vicinal_Ethylenediamines_with_-Amino_i_N_i_-_i_tert_i_-Butanesulfinimines_and_TMSCF_sub_3_sub_/3640998
10.1021/ja020482+.s001