para-bromoacetophenone; Benzoic acid (S)-1-[(S)-5-oxo-2-phenyl-3-(toluene-4-sulfonyl)-[1,3,2]oxazaborolidin-4-yl]-ethyl ester in toluene T=-10°C; 18 h; optical yield given as percent ee;

para-bromoacetophenone; Benzoic acid (S)-1-[(S)-5-oxo-2-phenyl-3-(toluene-4-sulfonyl)-[1,3,2]oxazaborolidin-4-yl]-ethyl ester in toluene T=-10°C; 18 h; optical yield given as percent ee;

With  hydrogenchloride in  tetrahydrofuran; water T=20°C;  optical yield given as percent ee;