hydrogenchloride; titanium(III) chloride; TADDOL multistep reaction; enantioselective conjugative addition of silylketeneacetals to 2-carbalkoxycyclopentenones promoted by TADDOL*TiCl2 complexes.;

hydrogenchloride; TiCl2(OPri)2; 4 Angstroem MS; TADDOL 1.) toluene, -78 deg C, 5 h, 2.) reflux; Yield given. Multistep reaction;

triethyl borane; oxonium 1.) hexane, RT, 2h, 2.) RT, 15 h; Yield given. Multistep reaction;

n-butyllithium; diisopropylamine in tetrahydrofuran; N,N,N',N',N'',N''-hexamethylphosphoric triamide 0 deg C -> room temperature;

1: acetic acid 1-tert-butoxy-vinyl ester With lithium diisopropyl amide in tetrahydrofuran T=-78°C; 2: tert-butyldimethylsilyl chloride With N,N,N',N',N'',N''-hexamethylphosphoric triamide in tetrahydrofuran T=-78 - 20°C;