Benzoic acid (S)-1-[(S)-5-oxo-2-phenyl-3-(toluene-4-sulfonyl)-[1,3,2]oxazaborolidin-4-yl]-ethyl ester in diethyl ether T=-10°C; Mukaiyama reaction; 97 h; Inert atmosphere; optical yield given as percent eeenantioselective reaction;

Benzoic acid (S)-1-[(S)-5-oxo-2-phenyl-3-(toluene-4-sulfonyl)-[1,3,2]oxazaborolidin-4-yl]-ethyl ester in diethyl ether T=-40°C; Mukaiyama reaction; 24 h; Inert atmosphere; optical yield given as percent eeenantioselective reaction;

Benzoic acid (S)-1-[(S)-5-oxo-2-phenyl-3-(toluene-4-sulfonyl)-[1,3,2]oxazaborolidin-4-yl]-ethyl ester in dichloromethane T=-40°C; Mukaiyama reaction; 24 h; Inert atmosphere; optical yield given as percent eeenantioselective reaction;

1: With Benzoic acid (S)-1-[(S)-5-oxo-2-phenyl-3-(toluene-4-sulfonyl)-[1,3,2]oxazaborolidin-4-yl]-ethyl ester in dichloromethane; toluene T=-10°C; Mukaiyama reaction; 48 h; Inert atmosphere; 2: With hydrogenchloride in tetrahydrofuran; water T=20°C; 3 h; optical yield given as percent eeenantioselective reaction;

1: With Benzoic acid (S)-1-[(S)-5-oxo-2-phenyl-3-(toluene-4-sulfonyl)-[1,3,2]oxazaborolidin-4-yl]-ethyl ester in dichloromethane; toluene T=-10°C; Mukaiyama reaction; 48 h; Inert atmosphere; 2: With hydrogenchloride in tetrahydrofuran; water T=20°C; 3 h; optical yield given as percent eeenantioselective reaction;

1: S-tert-butyl thioacetate With lithium diisopropyl amide in tetrahydrofuran T=-78°C; 1.5 h; 2: dimethylmono-chlorosilane in tetrahydrofuran T=-78°C; 0.5 h;